INSTRUCTION MANUAL Super compact 5 watt UHF CB radio ScanSuite™ 5 YEAR WARRANTY
CONTENTS SUPPLIED WITH....................................................2 Dynamic Volume Control (DVC)..........................15 INTRODUCTION...................................................3 Voice Scrambler.................................................15 IMPORTANT INFORMATION CONCERNING UHF CB RADIO............................................................3 Beep Tone Volume.............................................16 POSSIBLE ISSUES..................................................
INTRODUCTION The TX3120S is Australian designed and engineered combining the latest in electronic hardware with up-to-date computer aided design and manufacturing techniques to produce an extremely compact mobile radio with outstanding specifications and performance. Your radio is designed for unobtrusive mounting in modern vehicles. With its built-in loud speaker, speaker microphone and extremely small size, it can be mounted in almost any convenient location.
EMERGENCY CHANNELS TELEMETRY CHANNELS The ACMA has allocated channels 5/35 for emergency use only. Channel 5 is the primary Simplex Emergency Channel. Where a Channel 5 repeater is available, you should select Duplex on CH 5. ACMA regulations have allocated channels 22 and 23 for telemetry only applications and have prohibited the transmission of speech on these channels. Consequently your radio has a transmit inhibit applied to channels 22 and 23.
interfere with rear view mirrors and sun visors. It may also result in the DC power lead trailing in the field of vision. • Deciding on the location of the unit should also factor where power leads may need to run to avoid the possibility of them interfering with or becoming entangled in vehicle controls. • C overing or restricting access to dash instruments and controls is not recommended.
PRIVACY FUNCTIONS Voice Inversion Scrambler: When activated, scrambles your voice so that communications are only intelligible to others using the same scrambler technology. Inbuilt CTCSS & DCS: User selectable Continuous Tone Coded Squelch System and Digital Coded Squelch system provides silent operation on individual channels. PHYSICAL PROPERTIES Over Voltage Protection: Special overvoltage detection circuitry protects the radio and warns of excessive voltage conditions by flashing the display.
GENERAL OPERATION FRONT PANEL CONTROLS Channel Control Scan LCD Volume Control On/Off Squelch REAR PANEL DC Socket Microphone TX3120S Antenna Speaker I N S T RU C T I O N M A N UA L PA G E 7
LCD PANEL Scan Duplex Priority Signal Meter Transmit Busy CTCSS/DCS Information Channel MICROPHONE Channel Up Channel Down Push To Talk Priority Channel Scan PA G E 8 I N S T RU C T I O N M A N UA L TX3120S
ON/OFF SWITCH RECEIVE AUDIO MUTE Press the Volume control to turn the radio on. Press and hold the Volume control to turn the radio off. There may be times when it is desirable to temporarily override the minimum volume setting and completely mute the receiver audio. VOLUME Rotate the Volume control left or right to adjust the volume. During volume adjustment the Volume level is displayed on the LCD as ‘VOL01’ (minimum) to ‘VOL31’ (maximum).
CONFIGURATION MENU The configuration menu provides access to all the radio’s preset settings. To use the menu 1. Press and hold the Channel control until a beep is heard. The radio will enter the menu and the first menu item (Squelch level) will be displayed. WHITE SQL 3. Rotate the Channel control to adjust the selected item. a. To save the current setting and return to the menu, briefly press the Channel control. b. To exit without saving and return to the menu, briefly press the Volume control.
DESCRIPTION DISPLAYED OPTIONS Squelch Level SQL-1 -> SQL-9 CTCSS/DCS Tones CTCOF (CTCSS/DCS Off) CTC01 -> CTC50 (CTCSS Tones) DT001 -> DT104 (DCS Codes) Network Scan NS-OF (Off) NS-01 -> NS-50 (Using CTCSS) NS001 -> NS104 (Using DCS) Scan Group OPEN (Open Scan) GROUP (Group Scan) NETWK (Network Scan) Priority Channel PRI01 -> PRI80 Duplex DUPOF (Duplex Off) DUPON (Duplex On) Speaker (Internal) SPKOF (Off) SPKON (On) Beep Level BEEP0 -> BEEP9 Scrambler Encoder ENCOF (Off) ENCON (On) Dynam
FLIPPING THE DISPLAY SQUELCH The TX3120S’s small size allows it to be mounted in almost any convenient location. However the most suitable location may sometimes require the unit to be installed upside-down when referenced to your driving position. The Squelch is used to eliminate any annoying background noise when there are no signals present. The Squelch can be opened or closed by key.
NOTE: The Squelch level can be actively adjusted while the radio is scanning. This allows you to tighten the Squelch in cases where an undesired weak or noisy signal is interrupting the scan. When finished briefly press the Channel control to return to the menu or press and hold the Channel control to exit the menu. SIGNAL METER Prior to transmitting, always check the channel is not being used.
Adjusting the Backlighting The backlight brightness and colour can be adjusted via the menu for personal preference. There are three backlight settings available. BKLGT (Brightness setting): Provides a continuously variable brightness adjustment from very dim to full brightness. COLOR (Colour setting): Provides a continuously variable adjustment through the full colour spectrum. White (Whiteness setting): Controls the colour saturation of the selected colour from deep colour to white (no colour).
When finished briefly press the Channel control to return to the menu or press and hold the Channel control to exit the menu. If auto-colour is still enabled, the display lighting will continue to cycle through the colour spectrum until disabled using the steps above. Dynamic Volume Control ON DYNAMIC VOLUME CONTROL (DVC) Dynamic Volume Control OFF The modulation level of signals heard on the UHF CB band can vary considerably resulting in noticeable differences in received audio volume.
SILENT SQUELCH TAIL The Squelch tail is the short burst of noise that is heard in the speaker at the end of a transmission just before the Squelch closes. To some it is a reassuring confirmation that it is their turn to transmit but in some applications it may be an annoyance especially when listening through an earpiece or headphones. Scrambler Encoder ON Scrambler Encoder OFF BEEP TONE VOLUME The Beep Tone provides audible feedback whenever the keys are pressed.
DISABLING THE INTERNAL SPEAKER REPEATERS AND DUPLEX The TX3120S has two speakers – one mounted inside the radio and the other mounted inside the microphone. By default, sound is reproduced by both speakers; however if you prefer, the radio’s internal speaker can be switched off leaving just the speaker/microphone to reproduce sound. Duplex operation allows the radio to transmit on a different frequency to that which it receives. This allows operation through repeater stations.
Your radio allows you to enable or disable Duplex mode on individual repeater channels. In this way any repeater channels that are not being used with repeaters in your area can be used in Simplex mode for normal direct radio-to-radio communications.
IMPORTANT: Channels 1 – 8, 31 – 38, 41 – 48 and 71 – 78 should only be used in Simplex mode if there are no repeaters in or near your location that operate on the selected channel. In particular, avoid operating in Simplex mode on any of the repeater input channels 31 – 38 and 71 – 78 unless you are absolutely sure that there are no repeaters in range using that channel.
3. Rotate the Channel control to select your required Scan Group. Select ‘OPEN’ for Open Scan, ‘GROUP’ for Group Scan or ‘NETWK’ for Network Scan. When finished press and hold the Channel control to exit the menu. If the unwanted active channel continues to interrupt the scan after the 30 second skip period has elapsed, hold the key while the radio is paused on that channel to completely remove that channel from the scan group for the duration of the scan session.
When finished press and hold the Channel control to exit the menu. this time the channel numbers will scroll rapidly as the channels are scanned. Programming the Scan Memory NOTE: If there are less than 2 channels programmed into the scan memory when you key, a low beep will sound and the press the command will be ignored. Your radio has all 80 channels factory-programmed into the Open Scan memory. Any channels not required can be removed. To add or remove channels from the Open Scan memory: 1.
• If you need to use your Priority channel (for an urgent call), briefly press the Channel control. The scan will be cancelled and the radio will jump straight to the Priority channel. GROUP SCAN Group Scan allows you to scan a number of channels for activity whilst also monitoring your Priority channel. The receiver will scan the other channels ONLY WHILE THERE ARE NO SIGNALS ON THE PRIORITY CHANNEL.
in the reception of the busy channel. Once the signal has gone and there has been no activity for 5 seconds, the radio will resume scanning. • To transmit on the Priority channel at any time, simply press the PTT. The radio will switch straight to the Priority channel. When you have finished your conversation and there has been no further activity for 5 seconds, the radio will resume scanning the other channels.
• To disable Net-Scan, select NS-OF. When finished press and hold the Channel control to exit the menu. Selecting Net-Scan Once Net-Scan is enabled, a Network Scan option becomes available in the scan group selection. To select Network Scan; 1. Press and hold the Channel control to enter the menu. The display will show the current Squelch level setting. 2. Rotate the Channel control until ‘OPEN’, ‘GROUP’ or NETWK’ is displayed then press the Channel control to select it. 3.
transmission to be heard across the entire group. When the transmission ends, all radios in the group will immediately resume scanning. If a member of the group responds to the initial transmission, they will automatically re-use the same channel as long as the channel remains free of other signals. This allows the radios in the group to respond more quickly to further transmissions from others in the group. channel that is silent to all traffic except those you wish to hear.
2. Rotate the Channel control until ‘CTCxx’ or ‘DTxxx’ is displayed then press the Channel control to select it. 3. Rotate the Channel control to enable CTCSS/ DCS and select a suitable CTCSS or DCS code. • To use CTCSS, select from CTC01 to CTC50 (CTCSS tones 01 to 50). • To use DCS, scroll past CTC50 to select from DT001 to DT104 (DCS codes 001 to 104). To Enable Silent Mode on a channel: 1. Select the required channel. 2. Press and hold the is heard. key until a high beep icon (for DCS) 3.
The Busy Channel Lockout function detects when others outside your CTCSS/DCS group are transmitting on the channel and prevents your radio from transmitting over them. If the channel is busy and you press the PTT the radio will emit a warning beep and the icon won’t appear. When you release the PTT, look for the icon on the display as an indicator that the channel is in use. If the channel is busy, simply wait until the channel is clear and press the PTT again.
Mounting FITTING THE RADIO Microphone Cable Clip As the microphone connects to the rear panel, a cable clip is provided to route the cable towards the front. The cable clip is designed to be held against the side of the radio using the gimbal knob. The cable clip can be installed on either side of the radio with the cable clamp in the upper or lower position. To install the cable into the cable clip 1. Determine which way up your radio will be installed and which side of the radio you will mount the clip.
Gimbal Knob Gimbal Knob If using the mounting bracket, fit radio into the bracket and insert the cable clip at the required location. Install the gimbal knobs and tighten. Plug Microphone Plug into Socket on Rear Panel Microphone Cable Clip Gimbal Knob Mounting Bracket Microphone Cable If not using the mounting bracket, place the cable clip in the required location and insert the plastic collar provided. Secure the assembly using the gimbal knob and tighten.
FLIPPING THE DISPLAY ANTENNA CONNECTION The TX3120S’s small size allows it to be mounted in almost any convenient location. However the most suitable location may sometimes require the unit to be installed upside-down when referenced to your driving position. The TX3120S is designed to overcome this situation by allowing the display to be ‘flipped’ so that it can be read in either orientation. In addition the keys have symbols that can also be read in either orientation.
WIRING MICROPHONE CONNECTION The TX3120S is supplied with a speaker microphone which has a built-in speaker to supplement the speaker inside the radio when operating in noisy environments. The speaker microphone has a 2 pin connector that plugs into the dual socket on the radio’s rear panel. DC POWER CONNECTION The radio is designed for 13.8 volt DC, negative earth installations only (i.e. where the negative terminal of the battery is connected to the chassis or frame of the vehicle).
Connect the radio’s negative (black) lead to the vehicle’s chassis, or if preferred, directly to the battery’s negative terminal. The radio’s positive (red) lead should connect to an accessory point in the vehicle’s fuse box via the 2 amp fuse. This point should supply +13.8 volts only when the ignition switch is turned ON or in the ACCESSORY position via the 2 amp fuse. NOISE SUPPRESSION The inherent design of FM transceivers results in a high level of resistance to ignition and electrical interference.
CTCSS TONE FREQUENCY CHART No. Frequency No. Frequency No. Frequency No. 1 67.0 14 107.2 27 167.9 40 Frequency 159.8 2 71.9 15 110.9 28 173.8 41 165.5 3 74.4 16 114.8 29 179.9 42 171.3 4 77.0 17 118.8 30 186.2 43 177.3 5 79.7 18 123.0 31 192.8 44 183.5 6 82.5 19 127.3 32 203.5 45 189.9 7 85.4 20 131.8 33 210.7 46 196.6 8 88.5 21 136.5 34 218.1 47 199.5 9 91.5 22 141.3 35 225.7 48 206.5 10 94.8 23 146.2 36 233.6 49 229.
DSC CODE CHART DCS CODE DCS CODE DCS CODE DCS CODE DCS CODE DCS CODE 1 023 19 116 37 225 55 325 73 452 91 627 2 025 20 122 38 226 56 331 74 454 92 631 3 026 21 125 39 243 57 332 75 455 93 632 4 031 22 131 40 244 58 343 76 462 94 654 5 032 23 132 41 245 59 346 77 464 95 662 6 036 24 134 42 246 60 351 78 465 96 664 7 043 25 143 43 251 61 356 79 466 97 703 8 047 26 145 44 252 62 364 80 503 98 712 9 051
UHF CB OPERATING FREQUENCIES CH Frequency (MHz) CH Frequency (MHz) CH Frequency (MHz) CH 1 476.425 21 476.925 41 476.4375 61 Frequency (MHz) 476.9375 2 476.450 22 476.950 42 476.4625 62 476.9625 3 476.475 23 476.975 43 476.4875 63 476.9875 4 476.500 24 477.000 44 476.5125 64 477.0125 5 476.525 25 477.025 45 476.5375 65 477.0375 6 476.550 26 477.050 46 476.5625 66 477.0625 7 476.575 27 477.075 47 476.5875 67 477.0875 8 476.600 28 477.
SPECIFICATIONS ENVIRONMENTAL Temperature Range: -10°C to +60°C ELECTRICAL GENERAL Compliant Specification: Frequency Range: Number of Channels: Channel Spacing: Operation Mode: Scanning Speed: Antenna Impedance: Operating Voltage Range: Nominal Battery Voltage: Over Voltage Protection: Over Current Protection: Reverse Polarity Protection: AS/NZS 4365:2011 476.425 – 477.4125 MHz 80 UHF CB 12.5 kHz Simplex channels 1-80 Semi duplex channels 1–8, 41–48.
RECEIVER Circuit Type: Double Conversion Superheterodyne Intermediate Frequencies: 1st – 38.85 MHz 2nd – 450 kHz Current Consumption: < 180 mA muted 600 mA @ max. A.F output Sensitivity: 123 dBm for 12 dB SINAD unweighted Selectivity: -6 dB at + 3.5 kHz ‑60 dB at ± 12.
STANDARD COMMUNICATIONS WARRANTY AGAINST DEFECTS This warranty against defects is given by Standard Communications Pty Ltd ACN 000 346 814 (We, us, our or GME). Our contact details are set out in clause 2.7. (i) t he replacement of the goods or the supply of equivalent goods; 1. Consumer guarantees (ii) t he repair of the goods; 1.1 Our goods come with guarantees that cannot be excluded under the Australian Consumer Law.
2.7 Send your claim to: Standard Communications Pty Ltd. PO Box 96 Winston Hills, NSW 2153, Australia. Tel: (02) 8867 6000 Fax: (02) 8867 6199 Email: servadmin@gme.net.au 2.8 If we determine that your goods are defective, we will pay for the cost of returning the repaired or replaced goods to you, and reimburse you for your reasonable expenses of sending your warranty claim to us. 3. What this warranty does not cover 3.
For more information call or visit us: A division of Standard Communications Pty Ltd. Head Office: PO Box 96, Winston Hills, NSW 2153, Australia. New Zealand: PO Box 58446 Botany, Auckland, 2163, NZ. T: (09) 274 0955. All international enquiries email: export@gme.net.
