Angle adjustment Optional installation i POWER REQUIREMENTS The transceiver 15 supplied ready 1o operate from any regulated 138V .DC, 10 ampere negative grounding source. “An ‘automobile T2 volt, negative ground, system is usually more than adequate. Some note mustiness Le ken, however, of the condition of the vehicle's electrical system. Items such a5 low battery, worn internationalization, poor voltage regulator.
ANTENNA The:single: most important item that will influence the performance of any communication system thesis antenna: For that reason; a ‘good, high-quality: gain: antenna of ‘50 ohms impedance is recommended;fixed or:mobile. iin: VHF g5 well a5 the Jow bands, every watt of ERP makes some different: Therefore, 45 watts average output plus 3dB of gain antenna squeals 90 watts ERP, presuming low SWERVE of courses.
tithe “NOR position: the transmitting frequency is set 600K Hz (This can be changed to any Bandit 100K HE step frequency ) below the receiving frequency.
SCAN START/STOP BUTTON Starts and stops any of the scan functions. When depressing it again to restart the scam, twill start from the stopped memory channel or frequency.
20, EXTERNAL SPEAKER JACK Whine: an: external speaker misused connect Use a speaker with an impedance of 4~ Si ohms: i When the external speaker is connected the loudspeaker does not function: 21. POWER CONNECTOR Connect the supplied power cord to this connector: 22 MEMORY: BACKUP TERMINAL For connection iof a8 ~12V: DC power supply. i For mobile installation ‘connection 1o the vehicle's: battery can’ be made ‘the’ current drain s low; Tor: fixed installation use of ‘the 1C-BEI0A s recommended.
HOW TO TUNE The following instructions are for tuning in any mode, : Please read carefully and understand fully before turning ON your unit. Proper tuning is necessary for optimum operation. PRESET FREQUENCIES When the POWER Switch is turned ON, the frequency display will be “6.017 representing 146.010 MHz.: The frequencies of the UFO's and the Memory Channels are preset so that they start from the frequencies shown above whenever the 16-25TH is turned ON.
W Switching from one VEQ 1o the other VEG does not clear the first VEO, The frequency is retained in the Vireo's memory: FOR EXAMPLE! 1 146.520MHz [is set. with | QUIVERY, and the. VEO Switch: s Set 1o VB MEO, the frequency readout will show "BV E's frequency, but 146.520MHz is still stored in "AT NFL's memory. Re tuning the VEG Whitehorse "A" VEO position, and 76.52°" will be displaced on the readout.
NOTE: The OFFSET frequency can be sot either below or above the receiving frequency by the OFFSET switch. B UNSAVORY or "VERY position will allow you to access: s repeater that has & B00KHz input! output frequency separation. FOR EXAMPLE: Set A VRO to 148 730MHZ. " Then set the SIMPLEX/DUPLEX Switch to the "DUMPY position and the DUPLEX MODE Switch to the “NOR' position. 6.78 wail be shown an the readout during receive and 613 during transmit. You are now receiving on.
This function can be changed to stop when the squelch {5 closed, 1.6, an empty channel, by ‘the SCAN-STOP FUNCTION SWITCHING SOCKETS located under the 1op cover. PROGRAMMED SCAN This misused to’scan between two desired frequencies, which aré programmed in Memory Channels viand 2, by setting the VETO-SCAN FUNCTION Switch located on the front panel 1o “PROGRESS” position. 1 Program the frequencies of the high edge of the desired scanning range anti Memory Chance! the low edge into: Memory Chanel 1.
VFO FULL RANGE SCAN This is to'scan the entire band between 143.800MHz and 148.195MH2. 1. Set the MEMORY CHANNEL Switch to VFO position, and the TOSCANINI FUNCTION Switch: to: TELESALES position | Depressing the 15/8 button starts the scan from: the :VEQ frequency to the Jow adj: Scanning frequency increments depend on'the VEQ Switch setting. (NOTE: VEQ full range scan should be done in: A VEO (KHZ} to assure staving on the 18Kz channel spacing ot the upper MHz} 2.
By setting the SCANSION: TIMER: Switch ON position and the SCAN:STOP: UNCTION SWITCHING SOCKETS in BUSY: position; the scan 'will stop on: 4 signal; and: will restart after specified : time: is passed, whether 'signal has ‘been received or not: i This scan stopping time is adjustable between B seconds:and 25 seconds with the: SCAN-STOP TIME CONTROL Located under the top cover.
2 Lino signal can be heard but ably noise; turn the Squelch Control clockwise Until the noise from the speaker: stops and set it just below this threshold. (When disgusting the Squelch ‘control resting, If some communication signals can be Beard, turn the tuning control slither direction:and set it ware oily noise can be heard ) ' The transceiver will now remain tensity anti an incoming signal 1s: received: which opens: the’ squelch and Tights the RECEIVE in: dictator.
When' there are no incoming signals, rectified DC voltage from D16 and D17 is applied to the Base of Q18 turning it on. Since the collector of Q19 is connected to the base biz network of AE amplifier Q15 base voltage of Q15 falls and D15 is trued off, thus squelch action is applied. and no audio is amplified by IC4. At this time signal lamp contra IC, 163 of DRIVER unit, ‘does not conduct. and so the RECEIVE tamp goes off. When incoming signals are received, noise is suppressed.
MIXER CIRCUIT Chase modulated signals are fake out at the emitter of OB, and after amplified by (€2, are applied lithesome DBM that is:used for the receiver. 127MHz band signals farm the PLL unit, are mixed with the 16.8MHz modulated signals to give rials of 127MHz 215 MHz.
RE power output is fed to D1 in the PA unit and rectified; then fed 16 the indicator driver 1C throughout-level irresistible R110. : POWER SUPPLY CIRCUIT This recruit employs a multipurpose voltage regulator, 166, It puts out a constantly salivated 8V, RBV: which is operative during receive, and T8V which is operative during transmit. B8V is put out from Pin 6, and T8V s putout from Pin 8 ot 106 By grounding Pin 5, BBV goes OV and T8V dissociated, thus the set will be turned to transmit mode.
The programmable divider Ts also called the /N counter and the BCD inputting Ni: The relationship between the display Frequency the divide number Ni's as follows: DISPLAY FREQUENCY CPU OUTPUT DIVIDE NUMBER: (N} 144.000MHz 400 507 144.010MHz 401 508 t 1 ! 145:000MHz 500 807 ! { i 146 000MHz 600 707 & ! i 147.000MHz 200 807 ¢ ¢ i 148.000MHz 800 907 REFERENCE FREQUENCY GENERATOR CIRCUIT Reference frequency generator consists of a crystal oscillator and a high speed divider. X2 oscillates &t 5.
in the PLL unit to become the local oscillator signal for the transmitter and receiver, and to goat D-voltage to contra the frequent: of the VEO; DRIVER UNIT CLOCK PULSE GENERATE CIRCUIT The input data for the microcomputer, is controlled by a custom-made LS type TTL 10, 1CB. The clock rapids are generate by mechanical rotary-encoder: which 15 connected directly 1o 'the saith of the tuning control knob.
EFFETE. S the oscillation frequency 'is decided by ©7 only and 1he frequency is higher and the dispensed s fast. Her @ memory channel is selected {in the memory scan function}.a voltage is applied turned: ON and 108 s paralleled 10 :C7 2 This the: oscillation: frequency s dowered and the Sean sped incision, In the BIC UPTOWN function, 'as the UP Button on the microphone s depressed) the 8 point s grounded and the multi vibrator starts oscillation.
(Up/Down) This How occurs when the frenetically 5 moved Up.
(Duplex Reverse) This flow coursers when the OFFSET Switch asset and the DUPLEX MODE Switch in PREV™ position, the receive frequency 'becomes’ s frequency which is added 1o, the specified offset frequency ‘or subtracted it from the longing receive frequency and the transmit frequency Becomes the Ringling receive frequency.
