SG-2000 MANUAL SG-2000 1.6-30 MHz 150 Watt Output Multi-Mission HF SSB Transceiver Operations and Programming Manual Revised: Oct, 1995 CAUTION: Carefully read the "Quick Start" (yellow card packed with your radio) and the "Operating the SG-2000" section of this manual beginning on Page 41. The SG-2000 is a high precision electronic device. Taking the time to learn all of its capabilities will insure maximum performance, reliability and enjoyment of the unit. ©1995, SGC, Inc. The SGC Building, 13737 S.
SG-2000 MANUAL TABLE OF CONTENTS 1.0 General Description and Specifications.......................................................1 1.1 General Description of the SG-2000 ........................................1 1.2 Power Requirements .................................................................2 1.3 SG-2000 Performance Specifications .......................................2 1.4 Data Comunications ..................................................................3 1.5 Computer Control of SG-2000......
SG-2000 MANUAL ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 9.0 Installation 9.1 9.2 9.2 9.3 9.4 9.5 9.6 9.7 9.8 10.0 Power Supplies..................................................................................................30 10.1 Cabling.........................................................................................30 10.2 AC Power Supplies....................................................................31 10.3 Transformer-Rectifier Supplies................................................31 10.4 Mobile Power Supplies ...........
SG-2000 MANUAL 13.9 13.10 13.11 13.12 Programming..............................................................................63 Scanning Functions....................................................................64 Changing Frequency or Channel Scan Rates .........................68 Additional Functions.................................................................69 14.0 Mobile Installation ...........................................................................................75 14.
SG-2000 MANUAL 20.0 ©1995, SGC, Inc. Answers to Frequently Asked Questions.....................................................108 The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 21.0 Technical Reference..........................................................................................110 21.1 Squelch Scale Recalibration ......................................................110 21.2 SG-2000 Microprocessor Reset Procedure..............................110 21.3 Emergency Calling.....................................................................111 21.4 Basic Tune-up Procedure (Alignment) ...................................112 21.5 AM Filter Bypass..............
SG-2000 MANUAL 1.0 General Description and Specifications This section includes a short description of the features of the SG-2000 Transceiver along with its specifications. This manual includes information useful for the SG-2000, the SG-2000 SlimPak, and the Military version (PRC-2250 MIL). 1.1 General Description of SG-2000 Model Channels SG-2000 100 channels field programmable 644 factory programmed ITU voice and data channels Up to 100 channels programmable in 6 groups of 10 channels each In 0.
SG-2000 MANUAL Alarm generator Programmed for standard ITU and CCIR alarm on emergency frequency 2182 KHz or can be broadcast on any frequency. Having to press two push-buttons simultaneously to activate transmitter prevents accidental alarm. Operating temperature Full specification temperature Approvals -45° to 85° C -30° to 60° C FCC type accepted, parts 80, 87 and 90. DOC and CEPT(pending).
SG-2000 MANUAL AGC response Less than 5dB variation at the output for 5µVolt to 1 Volt RMS at the receiver input Clarifier range ±600 Hz in 100 Hz steps Receiver protection Up to 50 Volt RMS at the receiver input Squelch Voice operated with syllabic detection — adjustable threshold Speaker Internal ( on removable front panel) TRANSMITTER SPECIFICATIONS Power output in 50 ohms Power output reduction Maximum stress power output Sideband suppression Harmonic suppression Carrier suppression Carrier level Noise
SG-2000 MANUAL Access and recall Software System software ©1995, SGC, Inc. Of all transceiver functions except audio SG-2000 for DOS (Supplied with C language source code) DOS Ver. 3.0 or greater for IBM and compatibles (user supplied) The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 1.6 Multiple Control Head Specifications Local Remote Intercom Maximum number of controllers Telephone remote 1.7 8 (Total of control heads and computers not to exceed 8) Through standard telephone line and modem with telecommunication software and SGC-RS-232 software Dimensions and Weight Overall Dimensions Weight 1.8 One controller mounted to the radio (except SlimPak) Up to 50 meters away from the radio (10 wires) On all remotes 11.7 (H) x 25.4 (W) x 38 (L) cm 4.75 in.
SG-2000 MANUAL 1.9 External Accessories • Marine antennas • Vehicular antennas • Whip antenna in 8, 23, 28 or 35 ft.
SG-2000 MANUAL *** ©1995, SGC, Inc. Under ambient temperature and normal load conditions The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL DO NOT ATTEMPT TO TRANSMIT UNTIL THE RADIOTELEPHONE IS WARMED UP FOR AT LEAST TEN MINUTES. The crystals that control the operating frequency are contained in a precision oven that requires 10 minutes to rise to the correct temperature. Transmitting before the 10 minute warm-up period has elapsed may cause a violation of FCC regulations. Precautions: 1. Operating and installation personnel must observe all applicable safety regulations at all times.
SG-2000 MANUAL Please note that the radio arrived in a polyethylene bag which includes the instruction manual, warranty registration card and a quick reference card. Information on use of AT&T High Seas services is also provided for your convenience. The plastic bag protects the unit from dust and moisture when shipping.
SG-2000 MANUAL 3.0 History of the SG-2000 The SG-2000 is a high performance, microprocessor (computer) controlled multimission HF SSB radio designed to meet the needs of marine, commercial, para-military, and amateur radio users through the year 2000 and beyond. The SG-2000's heritage includes the SG-705, the world's smallest commercial HF SSB, the SG-715 waterproof manpack radio, and the SG-712 EX-11 which has been proven in commercial and military applications in all regions of the world.
SG-2000 MANUAL control for local use at short to moderate distances. • This radio would need to be controllable by a computer or its own control heads and it would have to support control from up to eight locations all at the same time. It would also be nice if the radio could be directed through a local area network with one computer on the network operating as a gateway.
SG-2000 MANUAL 4.0 12 About the SG-2000 The basic SG-2000 is really two units, which may be easily separated. One unit is what is called the Radio or RF unit. This contains the receiver and the transmitter's exciter and linear power amplifier modules. In addition, it contains the SG-2000's main microprocessor. The second unit, normally supplied attached to the radio unit, is called the control head.
SG-2000 MANUAL capture of signals in all modes. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL Once amplified to a standard level, the audio is sent to a jack on the back of the SG-2000 which allows for connection to a control head. In the control heads, the audio signal is further amplified and processed. A syllabic squelch circuit (which was pioneered by SGC in 1976) is used to turn off the noise coming out of the speaker in the event that a signal is not being received.
SG-2000 MANUAL mixed with the correct frequency developed by the synthesizer and is then amplified at the operating frequency. This amplification process involves several steps: a pre-driver, a driver, and a final amplifier section which utilizes a splitter - combiner circuit The pre-driver and the driver sections are very straight-forward in design. But the final LPA (Linear Power Amplifier) deserves special note because it is very conservatively constructed. This amplifier is made up of four transistors.
SG-2000 MANUAL For more information on controlling the SG-2000 via computer, see Section 16.5 of this manual regarding "Computer Networks - Serial Control" and the parts of Section 17.0 dealing with RS-232 software. 4.4 Control Heads There are several design considerations behind the SG-2000 control head which you should know about in order to appreciate the beauty of the architecture of the radio.
SG-2000 MANUAL The last jack, J505, is used for connecting an external speaker. This is also the most common connection for the Weatherfax. In addition, just to the right of the "U" bracket is an RS-232 connector for computer control of the SG-2000 radio, as explained later in this manual. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 5.0 SGC Family of Control Heads The SG-2000 comes with the standard control head described throughout this manual. In addition, there are six other control heads to choose from. These range from the small remote mobile heads to the new PowerTalk™ head incorporating ADSP™ and SNS™ noise reduction capabilities. 5.1 Remote Mobile Heads The four models of the remote mobile heads are designed to be used in conjunction with the SG-2000.
SG-2000 MANUAL 6.0 SG-2000 Software and Accessories This section lists various software options that are available for the MicroProcessor controlled SG-2000. In the event that you own an SG-2000 and later wish to add different software, such as the GPS software, Oil Rig software, Hong Kong software, or other software as may be periodically published, please be advised that there is a software update charge if the software is retrofitted into an existing radio. 6.
SG-2000 MANUAL 7.0 Planning for Installation Before installing the SG-2000, some pre-planning based on the capabilities and features of this radio should be undertaken to ensure the best possible performance. 7.1 Location of Power Supplies If you are installing your SG-2000 in a normal environment, such as a radio room of a ship or in a room of an office building or home, placement of the power supply is not critical as long as it is placed within 25 feet of the radio.
SG-2000 MANUAL cockpit. Aviation. Installation on aircraft presents an unusual challenge. In most cases, the control head is mounted separately from the radio. This allows the radio unit to be placed very close to the aircraft center of gravity. 7.3 Control Head Wiring The control head cables which are used with the SG-2000 are designed for use in normal conditions. This means that the cables are suitable for use in mobile and fixed installations.
SG-2000 MANUAL located) to the rear panel. When the head is detached, this wiring is no longer available. 7.5 External Accessories External accessory location should also be part of the planning process.
SG-2000 MANUAL 8.0 Radio Licenses Finally, before we discuss installation of the SG-2000 radio, we should discuss licensing. The operation of an SG-2000 generally requires two types of licensing. In the United States, both a station license and an operator permit are issued by the Federal Communications Commission. The SG-2000 is type accepted for use on both U.S. marine and amateur bands. Therefore it is exempt from Part 97.11 (b) regulations requiring separation of marine and ham radio equipment.
SG-2000 MANUAL If you do not plan to operate aboard a ship, but have a need to communicate with vessels on a regular commercial basis, you may qualify for a private coast station license. The U.S. F.C.C. also has licenses available for specialized needs such as long distance aviation communication. In the United States the use of a commercial SSB station on land to communicate with vessels is not allowed without proper licensing. To make application for a U.S. shore station, you will need to complete F.C.C.
SG-2000 MANUAL 9.0 25 Installation Your SG-2000/PRC-2250-MIL will provide superior communications under all conditions if you take the time to plan and install the radio equipment for maximum performance. Please read this section very carefully and implement as many of the suggestions as possible to assure a trouble free installation, a superior transmit signal, and clear reception.
SG-2000 MANUAL From left to right, these jacks provide the following: J-502 SG-230/SG-235 Smartuner™ connections J-301 Aux. Audio input/output and PTT line J-503 Remote control head or multiple head junction box J-504 Remote control head or multiple head junction box (Head mounted on radio is normally connected here.
SG-2000 MANUAL 9.2 External Modem, Weatherfax and High Seas Direct™ Connector J301 is used to connect the SG-2000 to an external modem.
SG-2000 MANUAL SGC Part Number 51-81 is an internal fan option which consists of a muffin type fan which is controlled by a temperature sensor inside the radio. With the fan on, air enters the bottom of the radio and is exhausted through a special louvered top cover and slots on the rear panel. When using the continuous duty option on the SG-2000, power output is limited to 110120 watts continuous. Maintain an unrestricted air flow area of at least 1 inch around all surfaces of the radio.
SG-2000 MANUAL TEST EQUIPMENT REQUIRED: None CAUTIONS: • Power must be disconnected from radio. • Do not over tighten screws which will strip heads. Installation Procedure 1. Remove top cover-secured by six black #6 Philips Head screws-set cover and screws aside. 2. Remove bottom cover-secured by six black #6 Philips Head screws-set cover and screws aside. 3. Remove rear panel connector cover-secured by three #4 Philips Head screws-set cover and screws aside. 4.
SG-2000 MANUAL 11. Install RF ground jumper braid onto radio rear panel RF ground bolt. 12. Install RF coax jumper into radio rear panel RF in/out connector-set the radio/tray assembly aside. 13. Install the control head rear panel as follows; a. Unplug the control head cable connector (10-position) from the control head display board assembly-set the cable assembly aside. b. Remove either head mounting bracket by removing two Philips Head screws. c.
SG-2000 MANUAL to front panel) ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 19. Re-install control head cable connector (10-position) into rear panel (from step #5) 20. Re-install cable clamp using one #4 Philips Head screws (from step #4). 21. Re-install rear panel connector cover using three #4 Philips Head screws (from step #3). 22. Install louvered top cover (supplied) using six #6 black Philips Head screws (from step 2). This concludes the Rack Mount Retrofit Procedure. 9.5 Control Head Installations The SG-2000 is a multiple control head radio.
SG-2000 MANUAL 3. 4. 5. 6. 7. 8. 9. ©1995, SGC, Inc. of the radio. Turn radio upside down on a stable surface. Remove the six screws which hold the bottom cover of the SG-2000 and remove the bottom cover. Two screws are located on each side of the radio and two screws are located on the bottom of the radio. Turn radio right side up. Locate and remove four Phillips head screws which hold the control head in place. (Two on each side.
SG-2000 MANUAL 9.7 Additional Control Heads (Part No. 04-11) Additional control heads may be added to the SG-2000 via the 10-pin connector located under the protective cover on the rear panel of the radio. In the event more than one additional control head is desired, a junction box is used. Please refer to the following diagram: REAR PANEL CONNECTION FOR ADDITIONAL CONTROL HEADS SG-2000 Rear Single control head ©1995, SGC, Inc.
SG-2000 MANUAL 9.8 Remote Head Cable Extension In the event that you need to extend the length of the control cable on the head of an SG-2000, two steps need to occur: First, you have to remove the control head from the radio. The procedure above will allow you to remove the control head. Second, you need to replace the existing cable with a longer one. The cable which connects the SG-2000 to the control head(s) is attached to the units using standard connectors at each end.
SG-2000 MANUAL 10.0 Power Supplies Many power sources can be used with the SG-2000. Among these are: • • • • Transformer or regulated power supplies from AC mains Battery systems Solar Systems Wind Powered Systems All modern transceivers run on 12 Volts DC. With the exception of AC mains power supplies, all other systems supply DC suitable to run a radio. However, various regulators may be necessary, because regulation of solar and wind powered systems is difficult.
SG-2000 MANUAL power is drawn, and nothing may work correctly because the voltage will drop dramatically. Let's consider wire sizes between the power source and the radio. At 25 feet we recommend number 6 wire. At 12 feet we also recommend number 6. At 2 feet we recommend number 8, but we use number 6 because its more in line with our practice of building generous margins into all SGC products. 10.
SG-2000 MANUAL 10.4 Mobile Power Supplies In virtually all mobile power supplies, the source of power is the alternator or generator system of a vehicle and the battery. There are several principals of good design that come into play in the mobile environment which you should consider when going mobile on HF. First, HF takes a lot of power on transmit.
SG-2000 MANUAL resistor in series with the ignition wire and installed at the distributor will usually help matters. When you are tracking down ignition noise near a gasoline engine, you may find that the distributor is a major source of noise. Generally, you can't use capacitors to reduce noise from a distributor because the noise is coming from the spark generated for ignition.
SG-2000 MANUAL 11.0 Antenna Systems The function of an antenna is to couple radio energy into space and the most important factor in considering an antenna is to realize an inescapable law of physics: big antennas are capable of doing a better job of coupling energy into space than are small antennas at any given frequency. The single most important formula to know in dealing with antennas is that the size of a 1/2 wavelength dipole antenna is: 468 divided by the frequency in Megahertz.
SG-2000 MANUAL 11.1 Antenna Wire Size Antennas are working their best when current in the antenna is high. A large wire will radiate more efficiently than a small wire. Stranded wires will also radiate better than solid wires. Because AC electrical voltages are carried by the surface of a wire, stranded wire has more surface area and therefore radiates more efficiently.
SG-2000 MANUAL There are also some other effects on antenna performance when it is raised up from ground. At low levels, down close to the ground, an antenna will exhibit a certain impedance (usually lower than at higher elevations). As a dipole antenna is moved up from the ground, it will go to a higher impedance until it settles at between 50 and 72 ohms at one wavelength over the ground. Radio signals are polarized.
SG-2000 MANUAL At closer distances, inverted “L” wire antennas with a suitable high efficiency coupler such as an SG-230 work very well. Dipoles, folded dipoles, and any other efficient 50 ohm antenna will work well at distances up to 1,000 Km. Loop antennas are best for receiving because they are quieted by presenting a short circuit to local noise pulses from industrial and commercial sources. But loop antennas need to be very large at low frequencies to radiate efficiently.
SG-2000 MANUAL 11.5 Antenna Couplers If the transmitter and the feedline are both 50 ohms and the antenna is 100 ohms, a mismatch will occur. A portion of the power coming from the transmitter which should be radiated by the antenna will be "reflected" back toward the transmitter. As this occurs, standing waves develop on the feedline.
SG-2000 MANUAL not generally well built and may fail when used in commercial service because of its poor base insulation and its lack of a shock absorbing base. It just whips around and doesn't stay where it belongs. Single element commercial heavy duty antennas such as those made by Hustler are a step in the right direction for lower frequency HF work.
SG-2000 MANUAL 3. If an antenna coupler is mounted in the trunk of a vehicle, it will have 1 to 2 feet of HV cable going to the antenna on the outside. With as short as a 1-foot lead wire, and using a 9-foot antenna, this means that fully 10% of the antenna system is inside the vehicle where it won't transmit or receive. It also creates another 10 to 100 pico Farads of capacitance which results in more losses! With QMS, you'll pick up 3-6 dB. 4. Wire size of the antenna counts.
SG-2000 MANUAL Loop antennas are similar, except that they will go all the way around the top of a vehicle and will have one side grounded to the coupler ground while the other side will be connected to the "hot" antenna lead at the insulator. A variation on the "J" antenna is something called a "shunt fed" antenna, like a towel bar; it is used by some of our clients on aircraft and on top of various vehicles which have special communications requirements.
SG-2000 MANUAL 12.0 Operating the SG-2000 Now with licenses, power supply, and antenna out of the way, let's get to the SG-2000 and its features. This portion of the manual is divided into three sections: syntax, front panel diagram, and key functions. Key functions are loosely grouped into two categories, basic and advanced. Basic key functions do not require the use of the Shift/Function keys. Advanced operations do require the use of the Shift/Function keys and may involve several key strokes.
SG-2000 MANUAL With an SG-2000, all you need to figure out is where the power switch is and know enough to hit the channel button until four dashes appear ( - - - - ), punch in 403 (the channel number desired) and press the channel button again to select the frequency. From this point, the radio will do the rest. You should know that when an SG-2000 is turned on, the speaker volume automatically comes up to a usable level.
SG-2000 MANUAL One other question that comes up from mariners from time to time is why some manufacturers refer to HF channels as “6A,” “4B,” and so forth. The “A” stands for the first simplex channel within a particular marine radio band when counted from lowest to highest frequency. Channel 6A would be ITU channel number 650 on a simplex frequency of 6215.0 KHz. This is also the 6 MHz band Distress frequency. Similarly, channel 4B would be 4146.
SG-2000 MANUAL 51 12.3 Push-Button Functions BASIC FUNCTIONS Power ON/OFF Press POWER NOTE: When you first turn on the SG-2000, it will automatically switch to the last frequency used. Monitor 2182 KHz Press EMER Send Emergency ALARM Press EMER + SHIFT/FUNC WARNING: Do not test this function unless you are operating the SG-2000 into a properly shielded dummy load. Otherwise, authorities such as the U.S. Coast Guard may begin a search effort.
SG-2000 MANUAL 52 the key sequence to execute the sequence. EXAMPLE: To enter the simplex frequency 3920.5 KHz, you would PRGM , FREQ Press Enter a DUPLEX Frequency Press PRGM , FREQ enter mode FREQ 39205 PRGM enter receive frequency FREQ enter transmit frequency PRGM EXAMPLE: To enter the duplex frequency 3920.5 KHz receive, 3815.3 KHz transmit and Lower Sideband, you would press: PRGM , FREQ 39205 FREQ 1 NOTE: The 1 key example.
SG-2000 MANUAL 53 receiver is silenced if no signal is present. Speaker On - Off Press 4 Observe front panel display changes and speaker is silenced when SPK light is extinguished on LCD. Timer On - Off Press 5 Observe "TIMER" indication over clock portion Displays clock time or date on front panel. on LCD.
SG-2000 MANUAL Scan by FREQUENCY 54 RADIO MUST BE IN FREQUENCY DISPLAY MODE. PRESS FREQ BEFORE ACCESSING THIS FUNCTION. THEN: Press SCAN then Up Arrow or Down Arrow Change Scan Direction While Scanning, press Up Arrow or Down Arrow Change Frequency Step While scanning by frequency, Press SHIFT/FUNC , FREQ or then Up Arrow Down Arrow Steps of .1, .5, 1, 3, 5 KHz may be selected.
SG-2000 MANUAL Delete User Channel Press PRGM (Begin with Channel Display) 55 , CHAN enter channel # to delete, CHAN SHIFT/FUNC , 7 , PRGM TIMER FUNCTIONS Set Time ON Press PRGM , 5 on time Down Arrow , off time Set Timer On Frequency Press PRGM , 5 , FREQ receive frequency PRGM FREQ mode PRGM Set Timer on CHAN 12.
SG-2000 MANUAL ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 13.0 Tour of the SG-2000 The heart of the SG-2000 is the front panel. We have made that as uncluttered as possible while still being able to handle many advanced functions. The front panel of the SG-2000 is dominated by a large liquid crystal display (LCD) which dominates the front panel. The large display was selected because in many applications, the operating conditions of the radio need to be quickly determined. The large backlit display is easily read under all conditions.
SG-2000 MANUAL LCD Numerals A3J A3H A3A CW USB LSB VOC TLX SPK SQL TND ATT NB Upper center of display. This shows the frequency or the channel which is being used by the SG-2000. Just left of the numerals is a flag which indicated "CHN" if channel information is displayed or "FRQ" if frequency is being displayed. Upper right corner of radio.
SG-2000 MANUAL INTCM Lower center of display over bar graph. It indicates the intercom feature to another control head is active. (You can activate this feature on an SG-2000 with no additional heads attached, but no one will hear you!) Bar Graph Lower center of display. Small numbers show under graph (10, 20, 50, 100). The bar graph displays relative strength of received signals and relative strength of transmitted signals. TEMP Lower right corner of display.
SG-2000 MANUAL 13.2 Front Panel Controls Control of the SG-2000 is accomplished through push buttons located on the front panel of the radio. We will cover the functions of each button; then we will do some actual “on-the-air” operations in the Operating Session section. The primary functions of each button are imprinted on the button itself. The yellow 1 button is the number 1 when you are entering a frequency. When you are listening to the radio, it will toggle between LSB and USB (see Section 13.
SG-2000 MANUAL The SG-2000 comes preprogrammed with all standard marine ITU and most SITOR channels (see ITU programmed frequency chart). The SG-2000 has the capability to hold up to 100 operator chosen channels in permanent memory. MODE Display of the current mode is in the upper right corner of the LCD display. The mode operation button allows the user to sequence through 4 modes of operations. The modes of operations are: 1) A3H: AM/AM compatible.
SG-2000 MANUAL VOC - TLX The standard SG-2000 has two selectable audio filters which allow the user to optimize the reception of incoming voice or data signals. The Voice filter, (VOC) allows a wide band width of 400 Hz to 2400 Hz. The second, the Telex (TLX) filter, is a tight filter centered at 1700 Hz. This filter increases the "signal to noise ratio" of the frequencies used in SITOR, RTTY, and FEC communications by removing unwanted noise.
SG-2000 MANUAL and helps to prevent signal overload when communicating with nearby stations. Signal overload occurs only when your location is extremely close to another transmitting station or the amount of signal arriving at your location is extremely high due to high power transmitters and high gain directional antennas being used. If your SG-2000 is operated in the area of high power broadcast stations, you will appreciate that the SG-2000 comes with a Broadcast Band filter.
SG-2000 MANUAL day on 2.5, 5, 10, 15, and 20 MHz providing time of day, storm warnings and navigation aid updates including the status of GPS satellites. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL TIMER This button engages/disables the alarm time programmed into the unit. (See Function Operation Instructions). When engaged, the unit will automatically shut down at midnight if there is no previous pre-programmed time. The SG-2000 may be programmed to turn on, tune to a pre-assigned frequency and mode of operation to receive daily broadcasts. At the end of these broadcasts, the radio can then be programmed to turn itself off.
SG-2000 MANUAL seconds and if there are no more breaks in the squelch, the unit will continue in the original direction. The scan channel mode is similar to the frequency mode in that when activated, the unit will begin to scan factory programmed ITU-VOICE and ITU-SITOR channels. The direction of the scan can be changed using the up and down arrows. When pressing the arrows in scan, the unit will step once in that direction and then pause for approximately 2 seconds.
SG-2000 MANUAL or Down arrows. To optimize the squelch level, depress the Up and Down buttons respectively and increase the SQL-Level once or twice. This function allows for optimum detection and minimum background noise. For viewing purposes, the adjustment levels are displayed on the bar coded meter. Noise Blanker This optional feature allows the radio to recover information that would otherwise be drowned out by high powered impulse type noise.
SG-2000 MANUAL mode is best. On the short wave broadcast bands, scanning at 5 KHz is great! The Rate function allows you to select pre-programmed scanning speeds of both frequencies and channels which range from .2 seconds to 40 seconds. See Section 13.11, Changing Frequency or Channel Scan Rates, for specific rates. Rate 13.5 Program Functions As was mentioned earlier, remember that the PRGM key means two things. At the beginning of a key sequence, it means “OK, do the following.
SG-2000 MANUAL SG-2000 very efficient. Power Before turning on the power to the SG-2000, you may notice a red stand-by light glowing on the lower left portion of the control head. This indicates the 12 VDC power is available for the radio. • If you do not see the red stand-by light on, please check your 12 VDC power wiring to determine why power is not being supplied to the radio.
SG-2000 MANUAL frequency displayed does not have an assigned channel number, four dashes will appear on the display. This indicates that the radio is not operating on a channel (and mode) which is in memory. 13.7 Channel Change Channel - Voice Mode In order to change the operating channel, press the CHAN key until four dashes appear. You will need to press it one or two times before the dashes appear. With the dashes displayed, type in the desired channel number with the key pad.
SG-2000 MANUAL changes of frequency you may use the UP/DOWN arrow. When these arrows are used, the frequency will increment in the desired direction (UP or DOWN) in steps of .1 (100 Hz), .5, 1, 3, and 5 KHz. The size of the step is set by the Change Frequency Scan Step procedure described on page 69. Frequency Change - Direct Entry To change to a new operating frequency via the direct entry method, the following steps are used: ©1995, SGC, Inc.
SG-2000 MANUAL 3) 72 Enter the frequency digits including the first number to the right of the decimal point. If you are satisfied with the mode and are not working duplex (that is, a different receive and transmit frequencies), go to Step 4. Otherwise, continue here. Optional: After you have keyed in the digits for the direct entry frequency you may change two other variables. You can specify mode and specify a transmit frequency if you wish it to be different from the receive frequency.
SG-2000 MANUAL You will notice that if you tune lower while listening to a voice on lower sideband, the voice will become lower in pitch. If you turn lower while listening to a voice on upper sideband, the voice will become higher.
SG-2000 MANUAL 6) Press the “FREQ” button to select mode of operation. 7) Press the “PRGM” button for simplex operation and to end the programming sequence. Enter a Duplex Channel into Memory If the desired channel is a duplex channel (e.g. different receive and transmit frequencies), these additional steps are required: 1) Follow steps 1 through 6 as shown above under Entering Simplex Frequency into Memory. 2) After step #6, press the “FREQ” button once more.
SG-2000 MANUAL Program a Channel Bank The SG-2000 has six channel banks numbered 00 to 05. Each of these banks will hold up to 10 channels, complete with mode and offset (if duplex). The entry sequence is: 1) Press the “PRGM” button. 2) Press the “SCAN” button. Note: The display will show the “PRGM” indicator active with the large digit display showing a “-0” on the far left. 3) Enter the desired bank number to be programmed (0-5).
SG-2000 MANUAL 76 Scan by Frequency - Specific Range This is an advanced function and should be studied closely. Also called Program or Band scanning, it allows the SG-2000 to scan in a particular mode between two frequencies. There are two steps to using band scanning with the SG-2000. First, you will need to load channels into the scan brackets. This tells the radio the range within which to scan.
SG-2000 MANUAL 77 Unload Frequency Limits In order for the SG-2000 to resume normal frequency scanning (scanning up or down anywhere in its range), it is necessary to unload the scan brackets. To do this, the following sequence is used. 1) Press “PRGM.” 2) Press “SCAN.” 3) Press “CHAN.” 4) Display will show limit.) 5) Press “SHIFT/FUNC.” 6) Press “7” (the delete key in the SHIFT/FUNC mode.) 7) Press “CHAN.” 8) Display will show [ L C : - - 2 3 ] (If Channel 23 is upper limit.
SG-2000 MANUAL Scan by Channel Banks 1) Press the “SCAN” button. 2) If the frequency is displayed, press the “CHAN” button to display six dashes. 3) If six dashes are already displayed, type in the desired banks to scan. Example: By entering “0134” the radio will scan through banks 0, 1, 3, and 4. If an empty bank is selected, the unit will first try to scan through that bank; however the bank will be eliminated once it is determined the bank is vacant.
SG-2000 MANUAL 79 Change Channel Scan Rate (In Channel Scan Mode) 1) Press the “SHIFT/FUNC” button. 2) Press the “SCAN” button.
SG-2000 MANUAL Display Alarm Time ON and Frequency 1) Press the “SHIFT/FUNC” button. 2) Press “1” or “LSB/USB” button. Display Alarm Time OFF 1) Press the “SHIFT/FUNC” button. 2) Press “2” or “VOC/TLX.” Program Time ON-OFF 1) Press the “PRGM” button. 2) Press “5” or “TIMER.” 3) Type in 1-4 digits for time on in 24 hour format 4) Press down arrow to program off time or “PRGM” to end Program Time ON Frequency 1) Press the “PRGM” button. 2) Press the “5” or “TIMER” button.
SG-2000 MANUAL 1) ©1995, SGC, Inc. Press “CLOCK/DATE.” The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL Set Clock 1) While clock is displayed, press the “PRGM” button. 2) Press “6” or “CLOCK/DATE.” 3) Type six digits for time desired (ie..131500 FOR 1:15 PM.) 4) Press the “PRGM” button to end. Set Date To program in the date: 1) While date is displayed, press the “PRGM” button. 2) Press “6” or “CLOCK/DATE.” 3) Type six digits for date desired in the format MM DD YY. 4) Press the “PRGM” button. Attenuator To turn 20 dB Attenuator on or off: Press the “20 dB /ATTN” button.
SG-2000 MANUAL 3) 83 Depress the “7” button to disperse. Control Head Number Display To display control head number for 2 seconds (will be timed out after 4 seconds): 1) Press the “SHIFT/FUNC” button. 2) Press the “0” or “MODE” button. Back Light To turn back light on or off or adjust brightness level: 1) Press the “SHIFT/FUNC” button. 2) Press the “CHAN” button. 3) Press “Up” or “Down” arrows to step through available levels.
SG-2000 MANUAL Lockout To lock out a channel in scan mode: 1) While scanning, wait for a channel to appear and press the “SHIFT/FUNC” button. 2) Press the “8” or “20 dB/ATTN” button. FWD / SWR To toggle forward power and SWR display in transmit: 1) Press the “SHIFT/FUNC” button. 2) Press the “9” or “PWR/HI LO” button. Transmit Channel Locking The SG-2000 includes a provision in software for locking the radio into channelized operation only.
SG-2000 MANUAL NOTE: If you are operating the SG-2000 aboard a vessel or in a mobile installation where channelized operation only is allowed, you may disable the all-frequency transmit capability of the SG-2000 . You may not wish to disclose the unlocking sequence to some operators. Simply say that the radio is type approved for ITU channels and it includes reception capabilities for all frequencies. You will be able to demonstrate that it will not transmit on unauthorized frequencies.
SG-2000 MANUAL 14.0 Mobile Installation Many tips regarding mobile installation have been given in the preceding chapters, but such a large and important field warrants its own chapter. 14.1 Shock and Vibration Mounting The need for shock mounting is widely misunderstood in radio circles. There are two issues with regard to shock mounting which must be considered: physical displacement and frequency. Displacement is how far a unit moves when vibration occurs.
SG-2000 MANUAL In other words, unless you are planning extraordinary abuse of a vehicle, a shock mount is not necessary. But if you run back country roads with 5 inch deep chuck holes which cause a vibration factor over 3, a shock mount is required. In addition to shock and vibration considerations, the mobile environment brings with it two additional issues which need to be addressed before satisfactory operations will be attained. One is the ground system; the other is ignition noise. 14.
SG-2000 MANUAL 4. The doors, hood, and truck lid should all be grounded to the vehicle using size #0 (AWG) braid or larger. It is important that all parts of the vehicle be bonded together in this fashion. 5. Take care to ground the vehicle exhaust pipe in several places. If the exhaust pipe is only partially grounded and vibration is encountered, the vibrating tail pipe can cause irritating noise. 6.
SG-2000 MANUAL 14.3 Vehicular Noise Sources There are three kinds of vehicle noise which will be encountered. One is the ground/static noise which should be eliminated by following the proper grounding procedures noted above. Second is engine noise and third is accessory noise. Let's address these step by step: 1. Diesel engines do not make ignition noise. If you are fortunate enough to have a diesel which doesn't need high voltage spark plugs, you are one step closer to a perfect mobile set up.
SG-2000 MANUAL solve many problems you are likely to encounter. 4. Capacitors will bypass spikes of electricity, such as those pulses which run the spark plug to ground. Small capacitors are fine; however, if you add too much capacitance to ground, you will flatten the ignition spike and reduce the intensity of the spark. The arrival time of the spark will also be delayed because the capacitor which you use will slow the rise time of the spark pulse.
SG-2000 MANUAL 15.0 Marine Installation Installation of the SG-2000 in the marine environment requires considerable care in order to achieve highly reliable operation because while the SG-2000 is a very reliable radio, the marine environment brings with it unique problems. These fall into three general areas: Installation of the radio, obtaining a proper ground system, and use of a suitable antenna. 15.
SG-2000 MANUAL 92 SGC does not endorse the use of artificial ground plates as a replacement for an adequate bonding system. While such plates, generally made out of a porous zinc alloy, provide some grounding, they are also subject to corrosion and marine growth which reduces their efficiency. There is no substitute for copper foil and lots of it! On FRP (fiberglass) hulls, a good connection to the sea may be made by routing foil as close to the hull as possible.
SG-2000 MANUAL ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 15.3 94 Marine Antennas In general, power boats use whip antennas and sailboats use back stay or triadic antennas. The placement of the antenna is not critical except that it should be kept at least 3 feet away from the rigging.
SG-2000 MANUAL On the High Seas Direct™ Modem Unit there are four connectors: 1. Modem Power Supply Connections Pin 1 2 3 (Supplies power for High Seas Direct Unit) Item Live 12/24 volts DC Earth (Ground) Ground 2. Modem RS-232 (DB-9) Connector (Provides connection to serial devices) Pin 1 2 3 4 5 6 7 8 9 Item DCD RX data TX data DTR Ground Fax Relay contact Relay contact Ground 3. Modem Connector to Radio (Provides connection from Modem to SG-2000) Pin 1 2 3 4 5 6 ©1995, SGC, Inc.
SG-2000 MANUAL 4. High Seas Direct Handset Pin 1 2 3 4 5 6 Item Common mic PTT In Mic In Audio Out Scrambler activate Ground PTT & Audio Modem to Radio Connections: High Sea Direct Modem Radio Port Pin 2 3 4 6 J301 Rear Panel Conn Item PTT TX Out RX In Ground ©1995, SGC, Inc. SG-2000 SSB Transceiver Pin <--connect--> <--connect--> <--connect--> <--connect--> 4 1 3 2 Item PTT Audio In Audio Out Ground The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 16.0 Remote Control There are three primary methods of controlling the SG-2000. One is by extension of the control head wiring. Second is via short haul modems and auto-answer telephone interface equipment. Third is via computer network and auto-answer devices. The first method does not require any additional equipment.
SG-2000 MANUAL 16.2 Short Haul Modems/Auto-Answer Devices The second way to achieve remote control of the SG-2000 is to use a number of telephone lines and a short haul modem. The configuration is basically the same as the extension via telephone wiring, described above, but short haul modems (1200 baud) are used to improve the reliability of the computer data which is exchanged between the control head and the main radio unit.
SG-2000 MANUAL 16.4 Auto-Answer Devices Particularly when used by a network, the SG-2000 needs to get audio for transmit and needs to send receiver audio somewhere. In order to accomplish this, the radio is usually equipped with a telephone patch such as the SGC TEL-TWO system.
SG-2000 MANUAL details of ALE (adaptive HF controllers) and serial port communications. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 17.0 External Software This section lists information on the RS-232 software, called Softlink, available for the SG-2000. 17.1 RS-232 Serial Control Software The RS-232 allows the SG-2000 to be fully controlled by a computer terminal (PC, IBM compatible, or laptop). Via the RS-232's control lines, the computer (in essence) becomes the control head for the SG-2000.
SG-2000 MANUAL 17.2 RS-232 Software Installation This section outlines system requirements, equipment setup, software installation, and troubleshooting information. SGC software is shipped on a 3 .5" disk although 5.25" is available upon request. You may install the software on a hard disk or you may run it directly from the product disk. If you decide to operate from the floppy drive, we recommend that you make a backup copy of the product disk we provide and keep the original in a safe place.
SG-2000 MANUAL Menu. 3. Running Software from Floppy Drives To run the software on the product disk, place the disk in Drive "A" (for 3.5" floppy). Now change to the "A" drive by typing: A: [enter] The computer will respond with the following prompt: A:\> Type the following command at the A:\> prompt to begin the software: SGC [enter] 4. Hard Disk Installation To install the software on your hard drive, place the program disk in Drive "A" (for 3.5" floppy) of your computer.
SG-2000 MANUAL software without written authorization from SGC. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 5. Customers may sell unmodified copies of the software provided that the customer has purchased one copy for each copy sold. 6. All copyright notices shall be retained on all copies of the software. B. SGC, Inc shall be absolved from all liability resulting from the use of this software. SGC's sole liability will be for free replacement of damaged software. C. SGC, Inc. reserves all title to the software which is copyrighted property of SGC, Inc. 6. RS-232 Software Troubleshooting A.
SG-2000 MANUAL 17.3 106 RS-232 Software Main Menu Display When the software is started, the Main Menu is displayed: Channel 99 Mode A3H Time 14:32:50 RC FREQ 3860.0 TX FREQ 3860.
SG-2000 MANUAL 17.4 RS-232 Software Main Menu Operations The following operations are accessible from the Main Menu (see page 92). A. Change channel Press "A" then enter the desired channel you wish to use. B. Change frequency Press "B" then enter the new frequency or use the 'up' or 'down' arrows to step through the frequencies. Transmit and receive frequencies may be selected independently if desired. C.
SG-2000 MANUAL F. Attenuator Press "F" to activate or deactivate the 20 dB attenuator. G. Emergency Alarm Press "G" to enable the two-tone alarm generator on the 2182 KHz emergency channel. WARNING: This option will transmit an emergency alarm on the international distress frequency. For this reason, you will be asked to confirm this selection before the transmission is implemented. H. 2182 Emergency Pressing "H" will automatically transfer you to the 2182 KHz emergency channel.
SG-2000 MANUAL 17.5 A. RS-232 “Software Menu 2” Operations USB / LSB This selection toggles between upper sideband and lower sideband. B. Noise Blanker This selection allows you to enable the noise blanker to block any and all unwanted intermittent noise pulses. (If the optional noise blanker has been installed). C. Power meter mode This selection toggles between FWD power and SWR. D. Power level This selection toggles operation between high and low power. E.
SG-2000 MANUAL 17.6 110 RS-232 Software Programming Functions: Pressing "C" on the Main Menu presents a sub menu which will prompt you to enter specific information as follows: Program Sub Menu [A] SCAN BANK [E] FREQUENCY STEP [B] TIMER [F] TIME [C] CHANNEL [G] DATE [D] SCANNING RATE A. Scan Banks: Enter the desired Scan Bank to program. B. Timer: The following sub menu is presented to allow you to program the radio to "wake up" at a preset time and operating in any specified mode.
SG-2000 MANUAL 111 Enter the desired parameter by depressing the appropriate letter. Select the receive frequency and press return; select the transmit frequency and press return to end function. C. Programming a channel. The SG-2000 supports up to 100 user defined channels. Select the desired channel you wish to program then all of the parameters in the following manner: CHANNEL [A] MODE A3H RX FREQUENCY 0.0 [B] AUDIO FILTER VOC TX FREQUENCY 0.
SG-2000 MANUAL 17.7 PC Cable Assembly The SG-2000 is can controlled by a computer — see the previous sections. However, computers can come with either a 9-pin or a 25-pin RS-232 connector as the COM port. The pin-outs are different between these two connectors; therefore this section will show how to construct a cable assembly to connect an SG-2000 to a computer using either variation.
SG-2000 MANUAL This cable assembly is not supplied by SGC. This information is furnished solely for customers to successfully build their own cables. However, a standard modem cable with a 9-pin male end and either a 9- or 25-pin female end (available both ways) is normally set up this way and will function efficiently if these three wires are verified to be connected as shown.
SG-2000 MANUAL 18.0 ALE and Adaptive Controllers AUTOMATIC LINK ESTABLISHMENT - ALE N O T I C E : The SG-2000 radio as described in this manual is not a controlled export item. ALE controllers provided by SGC or other vendors which incorporate link protection systems are export controlled technology. THE EXPORT OF THESE ALE CONTROLLERS REQUIRES A STATE DEPARTMENT EXPORT LICENSE.
SG-2000 MANUAL The data stream which is first established between ALE stations is called the ALE orderwire. It is designed to pass network traffic and to introduce standards beyond FS-1045 for network administration including text store, forward, and other enhanced data operations. 18.1 SG-2000 Serial Port Operation The SG-2000 can operate under the new U.S. Government Automatic Link Establishment protocol defined under standard FED-STD-1045 and under the military standards MIL-STD-188-141A.
SG-2000 MANUAL If an ALE system is linked, and operation of the link is disrupted through random noise or deliberate jamming, the controllers will establish communications on another channel. This function, called link protection, is controlled export technology and may not be exported to other countries without a permit issued by the U.S. Department of State. In addition, export of ALE controllers to certain countries is banned. Contact SGC directly for the current list of banned countries.
SG-2000 MANUAL 117 The RESET command (80) is issued as power up and whenever the ALE controller is switched between on-line and off-line conditions. The STORE command (84) is utilized to upload frequency and mode data into a selected memory within the SG-2000 for future recall. This command is issued whenever the system operator changes a channel memory value from within the "Channels" menu on the ALE terminal. The RECALL command (81) is the most commonly used command when the SG2000 is under ALE control.
SG-2000 MANUAL 118 18.4 Recall a Selected SG-2000 Memory into Active Use [02] [81] [17] ID/Count 2 bytes Recall Channel # Command 18.5 [98] Checksum (17 Shown) SG-2000 Connections to ALE Controller Connections between the ALE controller and the SG-2000 are listed in the manual for the ALE controller.
SG-2000 MANUAL TXMTP 8EH TBLNK 8FH SCSCR 90H SFSCR 91H CLARIF 92H RQXMT 93H CHSTP 94H FQSTP 95H GTTME 96H GTDTE 97H SVIEW 98H STSCN 99H TXEMF 9AH CHSCN 9BH FQSCN 9CH SPSCN 9DH SCNPS 9EH PWMTR 9FH SCNPN 0A0H LDTMR 0A1H LMRGL 0A2H GTTMR 0A3H GTTOF 0A4H INCOM 0A5H PRMUP 0A6H PCHUP 0A7H OBEEP 0A8H SCONT 0A9H SWTFR 0AAH LKCHN 0ABH UNCHN 0ACH STSTG 0ADH LSTSR 0AEH ©1995, SGC, Inc.
SG-2000 MANUAL 19.0 Accessories Two major accessories for the SG-2000 are the Digital Selective Calling system — Exsel-100 — and the Telerex error correcting radio communications data terminal unit. 19.1 Exsel-100 Selective Calling System The SGC EXSEL-100 unit is designed to operate with the SG-2000 transceiver but may also be used with any high quality SSB transceiver. The EXSEL-100 system may be configured as a standard unit, compatible with GMDSS CCIR-493 series operation.
SG-2000 MANUAL The EXSEL-100 enclosure allows use in automobiles, or alternatively, in base station installations with transceivers other than the SG-2000. For installation with units other than the SG-2000, please refer to the EXSEL-100 Interconnection Diagram for required connections to the transceiver. 19.2 TELEREX™ ARQ/FEC/SELFEC System The TELEREX-ST is an optional sophisticated microprocessor-controlled errorcorrecting radio communications data terminal.
SG-2000 MANUAL 122 20.0 Answers to Frequently Asked Questions The following is a short list of our more frequently asked questions: 1) Is there a charge for repairs out of warranty? Radios are warranted for five years parts and labor. After this five year period, a minimal repair charge is assessed depending on the individual situation. 2) How can I hook up weather fax equipment? There are two methods of hooking up weather fax equipment.
SG-2000 MANUAL 4) Are there any audio filters available? The short answer is no, not in the SG-2000 itself. However, our new product, PowerTalk™ offers several types of digital audio filtering processes. See question 6. 5) What are the actual values represented by the bar graph? Bar graph indications are for reference only and do not have a numerical equivalent. In CW mode, you should see almost all bars displayed on the forward scale. In voice, about half the bars displayed is normal.
SG-2000 MANUAL 124 21.0 TECHNICAL REFERENCE The following chapter is intended for more advanced users who would like a better technical understanding of the complexities of the SG-2000 radio. 21.1 Squelch Scale Recalibration The following procedure recalibrates the squelch level on the SG-2000: 1. Press: Shift/Func , 3 - Squelch Level - , 0 Allow to time out. 2. Press: Shift/Func , 3 - Squelch Level - , 9 Allow to time out. This process recalibrates the squelch scale.
SG-2000 MANUAL Batt B1 3V Pins 125 Components on Micrprocessor Board IC-14 IC-7 18 22 REAR OF RADIO IC10 IC-9 IC-11 J-3 C-14 Board edge 4. With power removed from the radio, momentarily ground pins 18 and 22 of IC-7 to chassis for 5 seconds each pin. Repeat. 5. Re-install MicroProcessor shield. 6. Re-install Top Cover. 7. Reapply 12 VDC Power and test. Please call SGC if further assistance is required. 21.
SG-2000 MANUAL depressing the EMER (STOP) button. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 21.4 127 Basic Tune-up Procedure (Alignment) 1) Attach a wattmeter and a 50 ohm load to the antenna connector. Allow 10 minutes warm-up before proceeding. 2) Set radio to a channel in the middle of its operating range. production radios are aligned using ITU channel 1601. 3) Confirm that radio is in high power mode by observing the front panel LCD. 4) Attach accurately calibrated frequency counter to pin 14 of IC608 and Ground.
SG-2000 MANUAL 21.5 AM Filter Bypass The SG-2000's normal range is from 1.6 to 30 MHz. To receive down into the AM band, you will need to bypass the AM filter. To do this: 1. Remove top cover by removing six 6-32 black Phillips head screws that secure the cover to the SG-2000. 2. Place radio with exciter PCB facing up. 3. There is a long “L” shaped metal heatsink bracket located on the left side of the exciter. On this bracket is the AM Filter PCB. 4.
SG-2000 MANUAL (1). Microprocessor Assembly: This module can be broken down to four different parts; 1) MicroProcessor 2) RAM 3) ROM 4) Communication port This module is responsible for programming the VCO and to control the tone frequencies generated. (1) 11.94 MHz Master oscillator with oven: This module generates the reference frequency for all transmit and receive functions. The Oscillator must be set for ±1 Hz at the highest operating frequency.
SG-2000 MANUAL 21.7 MicroProcessor Assembly (Schematic J30100930) This board is the primary controller for all functions of the SG-2000. The frequency and mode information is sent by the controller head processor to the radio processor. The radio processor then takes this information and converts it to digital signals used by the VCOs and other function switches.
SG-2000 MANUAL 21.10 131 Serial Logic Switches (Schematic J30100500) These serially loaded switches are contained in IC3 and IC4 on the LPA. The microprocessor sends a serial 16 bit word out along the data line while CS4 is held low. The 16 bit word is then latched into the two ICs and reflected on the output as either an open or closed collector.
SG-2000 MANUAL 21.14 Master Oscillator with Oven (Schematic J30100920) The master oscillator is a self-contained crystal / FET 11.94 MHz oscillator within a tightly controlled oven operating at 65°C. The oscillator produces a 4Vpp sine wave signal at a frequency of 11.94 MHz ±3.4 Hz over a temperature range of -30 degrees C to +50 degrees C. The oscillator is coupled to the PLL chip IC610 and is buffered to pin 14 of that chip.
SG-2000 MANUAL 21.16 Output Low Pass Filters(Schematic J30100500 2/2) One of six low pass filters located on the LPA assembly is selected by the MicroProcessor program. These filters eliminate harmonic distortion products from the linear power amplifier output signal. The following table lists the upper cut-off frequencies of the six bandpass filters selected in the LPA. 2.9MHz 4.6MHz 9.0MHz 15.6MHz 20.7MHz 30.0MHz 21.
SG-2000 MANUAL 21.19 Modulation Characteristics, Peak Envelope Power Limiting In order to test the modulation characteristics, a two-tone audio signal was applied to the microphone input of the transceiver. Frequencies of the tones were 400 Hz and 1800 Hz. Amplitude of the composite audio signal was adjusted to ± 10 dB above the level required for full power output (150 watt PEP).
SG-2000 MANUAL 135 INPUT LEVEL 0 Db =300mV Power output in Watts INPUT dB A3J A3H A3A Watts Watts Watts -50 0.0 37.0 3.9 -40 0.2 38.7 4.5 -30 1.6 50.0 8.0 -20 18.0 103.7 37.0 -10 131.2 144.5 144.5 0 141.1 147.9 147.9 10 147.9 147.9 147.9 20 147.9 147.9 147.9 160 150 140 130 120 O 110 U 100 T 90 P U 80 T 70 60 P 50 O 40 W 30 E 20 R 10 0 150 watts A3H A3A A3J -50 ©1995, SGC, Inc.
SG-2000 MANUAL 21.20 136 SG-2000 Performance Measurements The following is a diagram of how to set up appropriate test equipment to ascertain the performance of the SG-2000 transceiver. It is important that the equipment be set up as noted in the diagram on the following page and that the technician or engineer performing the measurements insures that all test equipment is in good working order and has been properly calibrated prior to performing measures.
SG-2000 MANUAL TEST EQUIPMENT SET-UP FOR SG-2000 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 139 Internal cable from main radio unit to local control head TO HEAD RED 1 13.6VDC 2 GND ORE 3 PTT YEL 4 OVEN 5 6 ON/OFF 7 8 DATA SHLDS GRY 9 AUDIO WHT 10 AUDIO SHLD BLK BLU GRN VIO DATA SHLDS SGC P.N. 291-310 CUSTOM CABLE SGC P.N. 881-017 21 inches TO RADIO SGC P.N. 291-310 AUDIO 10 WHT AUDIO 9 8 GRY 7 6 VIO ON/OFF 5 BLU OVEN 4 YEL PTT GND 3 2 13.
SG-2000 MANUAL External cable from main radio unit to remote control head TO HEAD RED 1 2 3 4 13.6VDC 5 6 ON/OFF DATA GRY 7 8 9 WHT 10 AUDIO SHLD BLK ORE YEL BLU GRN VIO SHLDS GND PTT OVEN DATA SHLDS AUDIO SGC P.N. 291-310 CUSTOM CABLE SGC P.N. 881-017 TO RADIO RED 1 2 3 4 13.6VDC 5 6 ON/OFF DATA GRY 7 8 9 WHT 10 AUDIO SHLD BLK ORE YEL BLU GRN VIO SHLDS GND PTT OVEN DATA SHLDS AUDIO SGC P.N. 291-310 J20100155 CABLE ASSY REMOTE 1 TO 150 FT ©1995, SGC, Inc.
SG-2000 MANUAL 141 Internal ribbon cable for communication of the Exciter board to Linear Power Amplifier board TO EXCITER TO LPA 8 INCHES 1 3 5 7 9 11 CONN SGC P.N. 292-066 13 15 17 19 BRN RED ORE YEL GRN BLU VIO GRY WHT BLK BRN RED ORE YEL GRN BLU VIO GRY WHT BLK 2 4 6 8 10 12 14 16 18 20 13.6VDC 13.6VDC 13.6VDC NOISE BLANKER(OPT) GND GND 13.6VSW 13.6VSW DATA CLK CS5 RX TX TEMP CS4 ALC FAN 10VTX ATTN 10VG FLAT RIBBON CABLE SGC P.N.
SG-2000 MANUAL Front panel microphone connector assembly and connection ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 22.0 Trouble Shooting 22.1 Dysfunctions 1. In the event you experience a failure of either output section of the LPA (Linear Power Amplifier), it is probable that the output combiner transistor (R-21) will also fail and need replacement to restore proper operation. 2. Over/Under voltage protection is included in the SG-2000.
SG-2000 MANUAL frequency on the station you wish to work. 22.2 Scanning in One Direction Only SGC has received several technical support calls inquiring about the radio scanning only in a single direction. In these cases, the radio is reported to be scanning in only one direction toward a certain frequency. If the radio is set to a low frequency, it may only scan upward toward a higher frequency. At high frequencies, the unit may only scan toward a lower frequency. This is not a defect with your radio.
SG-2000 MANUAL 23.0 SG-2000 Factory Test Procedures This section details the bench tests the SG-2000 goes through before it is shipped out to the customer. It is included here for our more electronically-minded customers who might want to do their own troubleshooting at the board level. It is highly recommended, however, that any SG-2000 with board-level problems be sent back to SGC Inc or to an authorized dealer for repair.
SG-2000 MANUAL mainly drivers and a multiplexer (IC510) for addressing each VCO. The oscillators are on sheet 4 of 6 and each has an input tuning voltage range between 0 and 8 volts. As the voltage increases, the capacitance on the varicaps goes down, thus increasing the oscillator frequency. The PLLs control this voltage by doing a comparison between a division of the reference oscillator and the output frequency. The receiver section of the radio involves three LOs to create two IF frequencies.
SG-2000 MANUAL 147 then put through the USB filter to get rid of inter-modulation and the other sideband. Both upper and lower sidebands can be sent through this filter by changing the mixing schemes through out the radio with an offset equal to the USB filter bandwidth. This signal is then bumped up to the IF frequency between 82 and 86 MHz (along with a re-injected 10.7 MHz for carrier for A3A and A3H modes only).
SG-2000 MANUAL 23.1.4 11.94 MHz Reference Oscillator Test The oscillator will drift for the first 10 minutes after power is applied while the surrounding oven warms up. Check for ~ 1.6 volts on R619 when the power is first turned on. (In the event of failure, refer to the crystal oscillator section of the schematic.) Check TP604 (or pin 14 of IC610 on older boards) for 11.94 MHz, 6 ±.5 Vpp. Adjust capacitors C639 (fine) and C640 (coarse) for 11.94 MHz ± 2 Hz on the frequency counter.
SG-2000 MANUAL VCO 1, 84-114 MHz Oscillator Check Note: VCO1 covers 2 sub-bands: LO = 84.14 - 97.34 MHz, HI = 97.34 - 112.34 MHz. Attach scope to TP401. Attach voltmeter to TP601 and frequency counter to TP401, use an X1 probe on the frequency counter. High VCO Check Set radio frequency to 29.9999 MHz. The scope should read 1 ±0.5 Vpp. Adjust L401 for 7.0 volts ± 0.2 VDC. Set radio frequency to 16 MHz, the frequency counter should read 98.34 MHz.
SG-2000 MANUAL 23.1.6 Receive Sensitivity Check The following describes the alignment of the receiving path on the exciter, starting at RF In (J101) and finishing at pins 9 and 10 of J503/J504 where the audio signal is passed to the SG-2000 head. 82 MHz filter calibration description. See diagram below: This is a combination of two filters: one band-pass filter composed of T106-T108 coupled with a High-pass filter composed of L121-L127. The left side edge of their graphed band pass coincide.
SG-2000 MANUAL 23.1.7 82 MHz and Displayed Frequencies Relationship Note: This test will show the band position of the 82 MHz filter used by the first intermediate frequency. It is not intended as a routine testing procedure but could help in troubleshooting Connect the Spectrum Analyzer to the second mixer, pin 8 (VCO 2 input) Check for the following values: ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 23.1.8 SSB Alignment See setup test schematic. Reduce the AGC response to a minimum by turning R286 fully clockwise. Inject at SG-2000 RF In/Out 10 µV (or less if the audio out on J103 looks distorted) of 10,001.0 KHz. Turn the radio on and program in the frequency 10,000.0 KHz A3J, USB, VOC, SPK modes. You should be able to hear the 1 KHz tone difference between the two frequencies and read it on the oscilloscope. If not, refer to the troubleshooting section.
SG-2000 MANUAL receiving quality. Note: the next steps are not necessary if all previous steps were successful. Fine tune the 82 MHz filter using a Spectrum Analyzer (see 82 MHz filter calibration described above). Turn the power supply to the radio OFF. Connect RF output of the Tracking Generator to point A on the Exciter with 0 dB output 84.00 MHz.
SG-2000 MANUAL Decrease the RF In to .5 µV and verify that S/N in A3J did not change. In the event of failure, refer to the Receive Troubleshooting section. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 23.1.10 20 dB Attenuator Check A 20 dB Attenuator is selectable in receive mode by pressing the 20 dB ATTEN key, and is enabled automatically when in transmit mode. RX: To check the attenuator in receive mode, set the radio to 10,000.0 KHz, A3J, USB, VOC, SPK, with AGC at minimum and RF generator to 10,001.0 KHz, .5µV connected at SG-2000 RF In/Out. Note the audio level on the dB meter attached to J301 Audio Out. Engage the Attenuator on the radio and note the indication of the dB meter.
SG-2000 MANUAL 23.1.12 156 600 ? Port/Audio Out Check Set RF Generator to .5µV 10,001.0 KHz Set the receiver to 10,000.0 KHz, A3J, VOC, USB. A 1 KHz sinusoidal tone should be heard on the speaker and monitored on the scope. The following values should be read at J103 pin 3 (Audio Out): Setting min AGC, R286 fully clockwise mid-range AGC, R286 at mid value max AGC, R286 fully counterclockwise Audio Out 2.5 ±.5 Vpp 1.8 ±.2 Vpp, no clipping 1.0 ±.2 Vpp, no clipping 23.1.
SG-2000 MANUAL 23.1.15 Transmit Calibration The following steps will adjust and verify that the RF out from the Exciter will drive the input of an SG-2000 LPA and produce 150 W (ALC disabled) into a dummy load. The audio signal used to produce RF Out from the Exciter can be selected between the 30 mV microphone input, CW tone generator on the Exciter or 600? audio generator attached at J301 Audio In. All sources should be adjusted for the same level at TP203 and produce the same Exciter RF Out.
SG-2000 MANUAL 23.1.18 600? Port Check With the radio in A3J, USB, VOC and a 50? dummy load connected to the Exciter's RF Out, turn the radio power on. Apply at J301 Audio In 195 ±10 mV RMS (500 mV RMS for Exciters Rev G and earlier) of 1000 Hz sinusoidal tone. Key the radio in transmit and verify that the level at TP302 is 150 mVpp. This should correspond to : TP301 = 240 ±10 Vpp J301 Audio In = 240 ±10 mVpp. 23.1.
SG-2000 MANUAL 23.1.20 Carrier Insertion Adjustment Note: The SG-2000 produces A3A, A3H modes of transmit by inserting a 10.7 MHz carrier through the Base pin of Q102 at levels of -14 dB and -2.5 to -4.0 dB Turn the radio on in Receive, 8.0 MHz, A3A, USB and have a 50 ? dummy load connected to RF Out from the Exciter. Key the radio in transmit and adjust R337 to get a value of 520 ±20 mVpp on the Collector pin of Q103 Change the radio to 2.
SG-2000 MANUAL IC208 pin 2 = 2.7 ±.1 VDC at HI power ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 23.1.23 Coupler Port Check J502 provides a coupler (like the SG-230 Pro and SG-235) with 13.6V and takes receive tuning status indication which is then passed to the Head and displayed as TND. Putting J501 pin 3 to GND momentarily should have the result of the TND indicator being displayed. 23.1.
SG-2000 MANUAL Set conditions as follows: any frequency in 1.6 to 30 MHz range A3J +90 dB (32 mV RMS) at RF In R286 adjusted at approximately mid value dB meter and scope attached to J301 pin 3 You should then read the following voltages: TP202 = 4.77 ±.01 V TP207 = 4.8 ±.1 V TP302 = 0.16 ±0.005 Vpp J301 pin 3 = 6.0 Vpp, no clipping 23.1.
SG-2000 MANUAL If the frequency is lower than 71.64 MHz, the voltage on TP602 should be 8 VDC. If the frequency is higher than 71.64 MHz, the voltage should be 0 VDC. You should be able to change the frequency below or above 71.64 MHz by adjusting L410 and, if the PLL works correctly, it should change the voltage on TP602 from 8 VDC to 0 VDC. If the PLL works correctly, it may be that the VCO is oscillating outside the limits of the PLL's capacity to adjust. Check for bad components in the VCO.
SG-2000 MANUAL 164 G ±20% H ±20% 4.1 V 4.0 V 1.6 V 4.6 V 4.4 V 6.7 V 6.0 V 2.1 V 2.7 V 7.4 V 0.0 V 7.3 V 7.3 V 1.4 V 1.4 V 0.0 V 0.0 V 9.8 V 2.2 V 3.1 V 4.9 V 5.0 V 7.2 V 7.3 V 3.0 V 3.0 V 4.5 V 0.0 V 5.7 V 6.9 V 1.6 V 3.2 V 3.2 V 4.3 V 4.0 V 4.1 V 5.6 V 1.4 V 2.6 V 5.1 V Test Area Note 101 101 102 103 104 105 106 107 108 109 110 111 111 112 112 113 114 115 Att Off Att on Rx Rx Rx/Tx Tx Tx Tx Tx Tx Rx/Tx Rx Tx Rx Tx Tx 4.1 V 4.0 V 1.6 V 4.6 V 4.4 V 6.7 V 6.0 V 2.1 V 2.7 V 7.4 V 0.0 V 6.7 V 7.2 V 1.
SG-2000 MANUAL 165 301 302 303 304 305 306 307 308 309 310 310 311 312 312 313 313 313 Rx/Tx Rx/Tx Rx/Tx Rx/Tx Rx/Tx Rx/Tx Rx/Tx Rx/Tx Rx/Tx Rx, A3H\ Rx, A3H Rx/Tx Tx, A3H Tx, A3A Tx, A3H Tx, A3A Rx 5.1 V 5.1 V 5.1 V 5.1 V 3.3 V 3.5 V 4.8 V 4.5 V 7.2 V 6.7 V 0.02 V 1.5 V 2.7 V 2.9 V 5.6 V 5.6 V 6.8 V 5.1 V 5.1 V 5.1 V 5.1 V 3.3 V 3.5 V 4.8 V 4.5 V 7.2 V 6.7 V 0.02 V 1.5 V 2.7 V 2.9 V 5.6 V 5.6 V 6.
SG-2000 MANUAL Test Area Note 166 G ±20 % H ±20 % 103 104 104 105 106 107 108 109 110 110 111 111 112 113 113 114 114 114 114 115 Rx Rx Tx Tx Tx Tx Tx Tx Tx Rx Tx Rx Rx Rx Tx Rx Rx, A3J Tx, A3H, No Mic Tx, A3A, No Mic Tx, A3J 150 mVpp 150 mVpp 120 mVpp 1.2 Vpp 1.1 Vpp 70 mVpp 0.0 mVpp 1.1 Vpp 110 mVpp 165 mVpp 210 mVpp 4.0 Vpp 95 mVpp 900 mVpp 50 mVpp 1.1 Vpp 90 mVpp 60 mVpp 30 mVpp 2.8 Vpp 150 mVpp 150 mVpp 70 mVpp 600 mVpp 520 mVpp 50 mVpp 0.0 mVpp 600 mVpp 70 mVpp 165 mVpp 100 mVpp 4.
SG-2000 MANUAL 167 301 301 302 302 303 303 304 304 305 309 311 311 313 314 315 Tx Rx Rx Tx, CW Rx Tx Rx Tx Rx Rx A3H Tx, A3A Tx, A3H Rx, .5 µV RF In Tx, .3µV RF In 470 mVpp 2.5 Vpp 850 mVpp 190 mVpp 4.0 Vpp 1.0 Vpp 4.0 Vpp 1.0 Vpp 90 mVpp 2.0 Vpp 80 mVpp 50 mVpp 85 mVpp 3 Vpp 1.5 Vpp 240 mVpp 2.5 Vpp 850 mVpp 170 mVpp 4.0 Vpp 1.0 Vpp 4.0 Vpp 1.0 Vpp 1.0 Vpp 2.
SG-2000 MANUAL J30100920 sh 1 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J30100920 sh 2 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J30100920 sh 3 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J30100920 sh 4 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J30100920 sh 5 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J30100920 sh 6 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 23.2. radio. LPA Testing Procedures This section details the procedures for testing the LPA PCB of the SG-2000 23.2.1 Required Testing Equipment Working LPA sample 12 inch/lbs calibrated torque wrench RF Signal Generator with capability of +3 dBm 1.6-30 MHz RF out Power Supply Capable of at least 30 Amps at 13.
SG-2000 MANUAL Q20 and D1 energizing the relay, K14. If a voltage in excess of the zener breakdown voltage of D11 is applied, transistors Q19 and Q21 turn on and Q20 turns off. Diode D13 provides protection from transient voltage spikes. 23.2.3 Test Setup Ensure screws holding the final transistors; Q6, Q7, Q10 and Q11 have 12 inch lbs. of torque. Using the LPA sample board, visually check: Check all electrolytic capacitors for polarity. Check for any solder bridges. Ensure R21 is not touching the PCB.
SG-2000 MANUAL Note on using HP8443A Tracking Generator as an RF generator The HP8443A Tracking Generator can substitute for an RF Generator with changes to the following settings: • If connected to the Spectrum Analyzer, turn CRT intensity on Analyzer to minimum. • (Scanning) Mode = scan hold. • Set RF Out to -3 dB before transmitting. Adjust the RF out only when not in transmit. Open the windings on inductors L1 through L15 to their maximum. Use the multimeter in the Ohms position.
SG-2000 MANUAL Reduce the voltage to zero and turn off the power supply. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL • Reverse Voltage (Rev E Boards ONLY) Reverse the power supply connections on the LPA. Watch the current meter on the power supply as you turn on the power supply. Turn off the power supply if there is any current and troubleshoot the problem. Increase the supply voltage to 40 V. Relay K14 should stay open all the time. Reduce the voltage to zero and turn off the power supply. 23.2.
SG-2000 MANUAL Connect Power Supply (PS-35) 13.6V to J12 + and J14 -. Turn Power Supply on, 13.6V indicator on Test Box should come on. Turn Test Box Power switch on, 10V indicator should come on. From Test Box Filter Band Select Knob (SW2), select each filter (A through F) by moving Knob from position 6 to 1. The Spectrum Analyzer should display the bandpass of the corresponding filter. Compare the Analyzer value with the value of the corresponding filter in the Filter Band Table above.
SG-2000 MANUAL Adjust the coils in the selected filter for lower current and higher RF Out, especially in the end of band frequencies. If RF Out from LPA is less than 140 W, increase the RF Out from the Generator (to no more than +3dB) until the power out is 140-160 W.
SG-2000 MANUAL Verify that V2 - V1 = 4.5 VDC ± 0.5 VDC. 23.2.8 Temperature Sensor Check The Temperature Sensor is built around IC1 on the LPA board and functions as follows: At room temperature, the voltages on pins 1, 2 and 3 of IC1 are as follows: IC1 pin 1 = 3.6 VDC IC1 pin 2 = 0.05 VDC IC1 pin 3 = 0.92 VDC When the temperature of the heatsink reaches; +55° C ±5° C (the low temperature trigger) the voltage on pin 2 of IC1 is = the voltage on pin 3.
SG-2000 MANUAL Turn power supply off. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 23.3 DISPLAY SECTION TESTING PROCEDURES This section describes the testing procedures for the Display section of the SG2000 radio. 23.3.1 Required Testing Equipment HP 331A Distortion Analyzer HEATH KIT IG-5218 Audio Signal Generator or equivalent PS-30 13.6V power supply SGC Display RX Audio Test Fixture Power Supply Capable of at least 2 Amps at 13.
SG-2000 MANUAL if it were a receive signal. The speaker is enabled by holding SPE low in CW mode. The receive audio signal is digitized for use by the squelch by over driving IC12A. The output on pin 7 of IC12A is a clipped version of the receive audio signal. This is inverted by IC13A which is the TMR signal. The TMR signal has a pulse repetition rate equal to the receive audio frequency. 23.3.3. Test Setup Visual inspection. Look for any quality defects.
SG-2000 MANUAL Voltage Check Turn power on. ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL 186 Using the multimeter, test each test point for the following voltages: Cathode D1 13.6 VSW (same as power supply) Output IC1 8 VG +/- 0.3 V Output IC2 5 VG +/- 0.2 V Output IC3 5 V +/- 0.2 V Pin 1 IC12D V REF (4V +/- 0.3V) 23.3.4 Input Ground Output Top View IC1, IC2, IC3 LCD Display Test The Display Test Chip has a special program to exercise the LCD (liquid crystal display) by sequencing through all of the possible display outputs.
SG-2000 MANUAL FONE connector to B.U.T. J4. Audio connector replaces wires 9 and 10 of J1 remote cable. Turn on the power supply and then the radio. Set the radio to the base station frequency in A3J mode. Set the Oscilloscope: Vertical Horizontal = 1 volt/div. = 0.2 msec/div. Set the Distortion Analyzer: Function Meter Range = Voltmeter = 1.0 VRMS Set Audio Generator: Load Frequency Amplitude = External = 1 KHz = 0 VRMS 23.3.
SG-2000 MANUAL 23.3.7 Speaker Level Check Change the distortion analyzer to 0.3 VRMS range. Adjust the audio generator for 100 mVRMS reading on the distortion analyzer. Increase the audio volume to the maximum level. Measure and record the voltage across the SPKR resistor with the oscilloscope. Ensure the speaker is enabled, signal should be a clean sine wave: SPKR = 8 Vpp to 10Vpp If test failed, check for the following levels: IC11 Pin 9 .05 Vpp IC11 Pin 10 .
SG-2000 MANUAL 23.3.9 Squelch Test The squelch (SQL) function will keep the receiving path into the speaker open as long as the received shgnal is of broadcasting structure and its strength meets the SQL's minimum level, preset by the user. The SQL level can be set from the keyboard from a range of 0-9 as follows: Press Effect. SHIFT Gain access to the secondary level of keyboard functions. SQL LEVEL The currently set squelch level is displayed on the bar graph and is able to be modified.
SG-2000 MANUAL 23.3.10 190 Speaker Clipping Level Check Connect the scope probe to the SPKR resistor and change to 2 volts/div. With volume set at maximum, increase the audio generator output level until clipping is visible on the scope. Record the results. Audio in SPKR = 0.12 VRMS to 0.19 VRMS = 10 Vpp to 12.0 Vpp Verify that no spikes are generated on the scope while adjusting the volume up and down. Turn off the radio and power supply. Disconnect the Display RX Audio Test Fixture.
SG-2000 MANUAL 23.3.12 Dynamic Microphone Level Check Select DYN on J6 for dynamic microphone. For level check without a voice compressor, set jumpers P7 and P8 in Bypass position. For 30 mVRMS, 1 KHz sinusoidal on microphone input j4, adjust R66 for 1.5 Vpp to GND on pins 9 and 10 of J1. For level check with a voice compressor, to achieve 5 mVRMS to VRMS variaton of 1 KHz sinusoidal on microphone input J4, adjust R66 and R1 on voice compressor for constant 1.5 Vpp to GND on pins 9 and 10 of J1. 23.3.
SG-2000 MANUAL 23.4 HEAD CPU and MAIN CPU TESTING PROCEDURES This section describes the test procedures for the SG-2000's Main CPU and Head CPU subassemblies. 23.4.1 Required Testing Equipment HEATH KIT IG-5218 Audio Signal Generator or equivalent Power Supply Capable of at least 2 Amps at 13.
SG-2000 MANUAL 23.4.3 Pretest Visual inspection. Look for any mechanical defects. Check for solder bridges, wrong parts installed, and shorts by comparing to the sample head processor board. Check all five jumpers. Use the multimeter in the Ohms position. Check for short circuits on the 5VG, 5VSW and 13.6VSW lines. Note: the 5VG and 5VSW lines are connected together by jumper JMP5. 23.4.4 MicroProcessor Ports Test Connect SGC Processor Ports Test Board to 13.6 V power supply.
SG-2000 MANUAL 23.4.5 Clock Test Measure and record the frequency at IC10. Pin Frequency 5 153.6 KHz +/- 63 Hz 9 4,915.2 KHz +/- 2 KHz Measure the frequency on IC7 pin 3 and adjust C14 so that a reading of 32,768 Hz is obtained. 23.4.6 Data In/Out Check This procedure tests if data signals are reaching TXD and RXD on UART (IC8). Data Out Check Press SW5 (RS-232 out). DS3 (SG-2000 out) should turn off and DS4 (RS-232 out) should turn on. Releasing SW5 will return to original stage.
SG-2000 MANUAL The Main Processor uses a “real time clock,” IC7, to keep time and store important data while there is no power to the SG-2000. While power is applied to the SG-2000, capacitor C31 charges to 5.5 volts. When power is removed, capacitor C-31 will discharge through Q2. This keeps the battery power turned on. After two weeks, the charge in C31 is reduced to the point that Q2 turns off. This prevents the battery from fully discharging.
SG-2000 MANUAL 23.4.8 196 Reference Logic IC2 is a 5 volt regulator, 78L05. IC3 is a Dual 2-to-4 Line Decoder, 74HC139. Truth Table IC3A Outputs Inputs G P1 H L L L L A4 P2 X L H L H Truth Table IC3B A5 P3 X L L H H Outputs Inputs Y3 P7 H H H H L G P15 H L L L L A6 P14 X L H L H A7 P13 X L L H H Y2 P10 H H H L H IC4 is a Quad 2-Input NAND Gate, 74HC00. Truth Table IC4C Outputs Inputs A2 P10 L L H H A3 P9 L H L H P8 H H H L H = high L = low IC5 is a Triple 3-Input NOR Gate, 74HC27.
SG-2000 MANUAL IC6 is a Quad 2-Input NOR Gate, 74HC02. Truth Table IC6A Inputs A8 P3 L L H H A9 P2 L H L H Outputs P1 H L L L H = high L = low IC8 is an Asynchronous Communications Interface Adapter (ACIA), HD63B50. The data rate = RxC or TxC / 16. Normally this is set to 9600. The parallel input/output lines are B0 through B7. The Transmit Data (TxD pin 6) is the serial output line. It is normally “high” when not in use. The Receive Data (RxD pin 2) is the serial input line. It floats at about 2.
SG-2000 MANUAL Data Carrier Detect (DCD bar, pin 23) is the input signal corresponding to the "carrier detect" signal which shows carrier detect from a modem. When the DCD bar goes “high,” the ACIA stops all the receiving operation and sets the receiving part in reset status. The IRQ bar goes “low” if interrupt enable is set, while DCD bar is “high.” When the DCD bar goes “low,” the receiving part is allowed to receive data. The DCD bar should be connected to ground.
SG-2000 MANUAL 23.5 FINAL ASSEMBLY TESTING PROCEDURES In addition to the checks, tests, adjustments, measurements and calibrations the individual PCBs go through, each fully assembled radio is also thoroughly tested before being sent out to the customer. Though the actual tests are long and detailed, a listing of the tests performed before any SG-2000 is shipped to a customer will indicate our commitment to providing the best radio possible. 23.5.
SG-2000 MANUAL 23.5.2 Pre Rack #2 Tests The following tests are done to the SG-2000 after 12 hours on Rack #1 and before 12 hours continuous cycling 150 W CW transmitting on 4.5 MHz into the light bulb antenna load on Rack #2: Inspection before removal from Rack #1 Bench inspection (visual, ohms, serial, etc.
SG-2000 MANUAL 24.0 Schematic Reference Section INCLUDING PART LOCATION DIAGRAMS Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 ©1995, SGC, Inc.
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SG-2000 MANUAL J30100935 sh 1 of 1 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
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SG-2000 MANUAL J30100921 sh 1 of 1 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100920-1 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100920-2 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100920-3 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100920-4 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100500 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100910 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100935 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100930 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J20100200 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100300 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100550 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100920 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100500 Block Diagram ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL J40100930, 935 ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
SG-2000 MANUAL Index 11.
SG-2000 MANUAL Deleting Errors in Entry 64 Dimensions and Weight 4 Display 58 Display (Date / Time) 72 Display Alarm Time OFF 70 Display Alarm Time ON and Frequency 69 DISPLAY TESTING PROCEDURES 163 Dynamic Microphone Level Check 170 Emergency Calling 111 Enter a Duplex Channel into Memory 64 Enter a Simplex Channel into Memory 63 Exciter Testing Procedures 129 Exsel-100 Selective Calling System 106 Extension of Control Head Wiring 85 External Accessories 5, 18 External Coupler Installation 22 External Mode
SG-2000 MANUAL MODE FUNCTIONS 45 Modulation Characteristics, Audio Frequency Response 118 Modulation Characteristics, Peak Envelope Power Limiting 119 Multiple Control Head Specifications 4 Near Vertical Incidence Skywave 36 Noise Blanker 58, 72 Oil Platform Software 15 Operating Session 59 Operating the SG-2000 41 Operational Test 174 Operator Licenses 20 Oscillator and Filter Operation 113 Output Low Pass Filters 118 oven Switch 116 PC Cable Assembly 98 Phone Level Check 167 PLLs 114, 115, 129 Power 59 Po
SG-2000 MANUAL Serial Communication Protocol 102 Serial Logic Switches 114 Serial Logic Switches 116 Set Clock 71 Set Date 71 SG-2000 Connections to ALE Controller 104 SG-2000 Front Panel 13 SG-2000 MicroProcessor Reset Procedure 110 SG-2000 Performance Measurements 121 SG-2000 Performance Specifications 2 SG-2000 Rear Panel 13 SG-2000 Rear Panel Connections 21 SG-2000 Serial Port Operation 101 SG-2000 Software and Accessories 15 SG-2000 Test Procedures 129 SHIFT FUNCTIONS 46 Shift Functions 57 Shift/ Func
SG-2000 MANUAL ©1995, SGC, Inc. The SGC Building, 13737 S.E. 26th St. Bellevue, WA.
