TX3420 REMOTE MOUNT UHF RADIO
CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Open Scan Mode. . . . . . . . . . . . . . . . . . . . . . . . . 7 Important information concerning uhf cb radio. . . . . . . . . . . . . . . . . 2 Group Scan Mode. . . . . . . . . . . . . . . . . . . . . . . . 7 Emergency channels. . . . . . . . . . . . . . . . . . . . 3 telemetry channels. . . . . . . . . . . . . . . . . . .
will be able to converse with all older 40 channel wideband radios on all channels 1 to 40 and the newer channels allocated between 41 to 80*. • Microprocessor Controlled Frequency Synthesiser: The mixing of narrowband and wideband radios in the same spectrum can however cause some possible operating issues of interference and varying levels of received volume.
General operation Channel Selector/PRI Key Liquid Crystal Display Volume Control TX3420 PUSH PRI Microphone Port SCAN OS/GS MENU F Menu Key/F Key Scan Key/OS/GS QUIET DUP SQL ALPHA Quiet Key/Duplex Key Squelch KeyAlpha Key Function Key Selecting Channels The four keys beneath the TX3420’s display have both primary and secondary functions. Their primary functions are printed in Black while their secondary functions are printed in Red.
to allow the signal to be heard clearly. Alternatively you can reduce the Squelch sensitivity as described as follows. 2. Briefly press the F key followed by the DUP key. ‘DUP’ will appear on the display accompanied by a high beep. To remove Duplex from a channel Squelch Sensitivity 1. Select the required channel 1-8 or 41-48. ‘DUP’ will be visible on the display. The sensitivity of the Squelch to incoming signals can be set to suit your operating environment.
1. Rotate the Channel knob to select the required channel. CTCSS CTCSS (Continuous Tone Coded Squelch System) is a squelch quieting system that allows several groups of users to share the same channel without disturbing each other. It uses a preset sub-audible (very low frequency) tone to open and close the squelch on your radio. There are up to 50 tones available in two optional tone sets.
Selecting a Scan Group OPEN SCAN MODE To pre-select a scan group Using Scan in the Open Scan Mode The radio is initially set to Open Scan mode. To change to Group Scan mode, press the F key then the OS/GS key to select Group Scan. Programming Scan Channels • If a busy channel is found, scanning will pause on that channel to allow the signal to be heard and will remain there for as long as the channel remains busy. Once the channel has been clear for 5 seconds, scanning will resume automatically.
3. P rogram the required ‘other’ channels into your Group Scan memory (see Programming Scan Channels on page 6). Scanning in the Group Scan Mode To scan in the Group Scan mode, briefly press the SCAN key. A high beep will be heard, ‘SCAN’ will appear in the display and the radio will begin scanning.
Your TX3420 will allow you to store up to ten (10) of your most frequently called Selcall numbers in memory. Each number can be labelled with a 5-letter name for easy identification. is busy. When QUIET is set, you may see the ‘BUSY’ icon appear on the display indicating the channel is being used. However, unless someone transmits your Selcall Ident, nothing will be heard in the speaker. Selcall Identification Number You can activate QUIET mode on individual channels i.e.
Note: If the call is not sent within 10 seconds of entering the last Ident digit the call mode will time out and the radio will return to normal mode. To exit CALL TO mode without sending the Selcall briefly press the CALL button. 2. Rotate the Channel knob to select the required Ident memory in locations ‘c0’ to ‘c9’. Call Acknowledge Naming your Selcall Idents If your Selcall transmission is successful, the radio you called should respond with an ‘acknowledge’ signal - usually two quick beeps.
(b) Briefly press the Channel knob again to select the next character position. (c) Repeat steps (a) and (b) to enter all 5 characters as required. (d) Now press and hold the Channel knob. The entire ALPHA name will flash for a few seconds then the radio will beep as the name is stored. Repeat the procedure to add ALPHA names to any other Selcall Idents stored in memory. To exit CALL-TO mode Briefly press the CALL button. The radio will return to normal operation.
2. Briefly press the F key followed by the QUIET key. ‘QUIET’ will disappear from the display and all channels that were tagged for quiet operation will now operate normally again. Receiving Signals in QUIET Mode • If a normal signal is received on a QUIET channel, the channel will appear busy (the ‘BUSY’ indicator will be visible) but no sound will be heard from the speaker. This means you will not be disturbed by the signal.
• Transmitting 1233A will activate the alarms in all radios with Idents 12330 through 12339 (a total of 10 radios). If the radios in your fleet do not have sequentially numbered Selcall Idents and you want to make use of this function, you can arrange for your retailer to re-program the Selcall Idents in your radios. Receiving Group Calls Receiving a Group Call is identical to receiving a normal Selcall except that the alarm sound is a LOW tone beep instead of the normal HIGH tone beep.
6. Once you have enabled and programmed your additional listening channels, switch the radio OFF to end the initial programming operation. When you switch it ON again, normal operation will be restored and only the listening channels you have enabled will be available above channel 40. PROGRAMMING THE LISTENING CHANNELS The display can show the frequency of the listening channel when the radio is in NUMERIC mode, or an associated alpha tag in ALPHA mode.
USING SEEK MODE range, thereby increasing the chance of finding an active frequency of interest. Before using Seek mode you should 1. Select your preferred frequency step (12.5 kHz or 25 kHz). 2. Enable the listening channel numbers in which you wish to store active frequencies. You cannot use Seek mode unless at least one channel is enabled. 3. Select NUMERIC mode so that the frequency can be displayed (rather than the alpha label).
To start seeking between the first and second frequency limit To access the Menu functions 1. W hile in Frequency Edit mode, rotate the Channel knob to select a frequency that is between the two frequency limit points. 2. Start seeking by briefly pressing the SCAN button. To start seeking between the higher frequency limit point and 520 MHz 1. W hile in Frequency Edit mode, rotate the Channel knob to select a frequency that is above the frequency of the higher limit point. 1.
2. P ress and hold the MENU key until the radio beeps. SQL-x will be displayed where x is a number from 1 to 9. 3. Rotate the Channel knob increase or decrease the preset squelch to the desired setting. 4. Press and hold the MENU key to store the new setting. SELECTING DUPLEX Duplex operation allows the radio to transmit on a different frequency to that which is receives. This allows operation through repeater stations.
BATTERY / S-METER / ALPHA SELECTION The TX3420 has the option of displaying either the battery voltage or the incoming signal strength (S-meter) in the area beneath the channel display. In addition, when ‘Listening’ channels (81-99) are selected, the radio provides an extra option of displaying the frequency of the selected user channel or a custom ALPHA label (when ALPHA mode is selected). design allows it to be mounted in almost any convenient position accessible to the driver.
Fitting Remote Head Bracket Fitting the Microphone The microphone uses a miniature 6 pin telephone style plug and socket. To fit the microphone: TX 34 1. Position the microphone plug so the plastic tab faces downwards, and press the plug into the socket until it ‘clicks’. 20 2. Gently press the rubber strain relief into the hole surrounding the socket so that the slot around the strain relief fits neatly inside the lip of the hole. Mounting the Cradle Plastic tab Removing the Microphone 1.
Converting the TX3420 into an Underdash radio Console Mounting the TX3420 If your installation does not require the use of a remotely mounted control head, you can convert your TX3420 to a compact underdash radio by fitting the remote head front panel directly to the main unit as follows. Remote Head Unit Disassembly 1. Remove the two black screws from the metal cableclamp plate at the rear of the remote unit.
HIGH VOLTAGE WARNING Radio remains ON when Ignition Switch is OFF The TX3420 has a built-in, high voltage detection system to warn you if an overvoltage situation occurs. Fuse RED To TX3420 If the power supply voltage exceeds 18 Volts DC, the channel display will flash ‘hi dc’ for 5 seconds when the unit is first turned ON, or at the time the voltage exceeds 18 Volts. In addition, when transmitting, the TX indicator will flash and the transmitter will select low output power.
RED + Extension Speaker Fuse Coax Cable – BLACK Antenna Socket Connector Plug DC Socket UHF Aerial UHF CB Operating Frequencies Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 1 476.425 ~ 21 476.925 41 476.4375 ~ 61• 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.
Specifications* ENVIRONMENTAL Receiver Temperature Range: -10°C to +60°C Circuit Type: Double Conversion Superheterodyne ELECTRICAL Intermediate Frequencies: 1st - 38.85 MHz 2nd - 450 kHz General Compliant Specification: AS/NZS 4365 Current Consumption: < 200 mA muted 600 mA @ max. A.F output Frequency Range TX: 476.425-477.
STANDARD COMMUNICATIONS CONTRACT WARRANTY 1. Statutory warranties 1.1 The Trade Practices Act Part V, Division 2A and other legislation imply conditions, warranties and other obligations on us to consumers that cannot be excluded, restricted or modified. Those provisions apply to the extent required by law. 1.2 We exclude all other conditions, warranties and obligations which would otherwise be implied concerning the activities covered by this agreement. 1.
