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Resumen del manual
the transmit/receive frequencies are exactly the reverse of another repeater. For example repeater A uses 146.000 for a transmit frequency (OUTPUT) and 146.600 for receive (INPUT). Repeater B uses 146.000 for its receive and 146.600 for its transmit frequency. It would be inconvenient to have to reprogram the transceiver each time if you were in range of both repeaters. The REV key allows you to reverse the transmit and receive frequencies. To use the REVERSE function press the REV key. The offset indicator ( ■+■ or [=] / [=] or [=1 ) will flash OFF and ON in the display to remind you that you are working a reverse repeater pair. To return to normal offsets press the REV key again. This function is also useful to check the input frequency of the repeater, so that you can determine if you are within SIMPLEX communications range. 3-6-3 TONE OPERATION Some repeaters require the use of a control signal to activate the repeater. Several versions are currently in use worldwise. In the United States sub-audible tones are sometimes used. With the TH-25A/25AT/45A/45AT/55AT 37 different sub-audible tone frequency selections are possible with the use of the optional sub-audible tone encoder/decoder (TSU-6). This accessory also allows for CTCSS (Tone Squelch) operations. When this option is activated the squelch of the transceiver will only open when the proper sub-audible tone is received. 17 • Tone Activation To activate the TONE function depress the TONE switch on the top of the transceiver. The tone indicator will appear in the display to signify the tone has been activated. To turn the tone OFF press the TONE key again. Tone frequency selection 1. Press the CTCSS key for longer than 1 second. The current tone frequency will be displayed. 2. Rotate the Tuning control until the desired tone frequency appears in the display. 3. Press the TONE key to turn to the normal frequency display. 4. If CTCSS (Tone Squelch) is not desired press the CTCSS key to cancel the function. The transmit tone will still be active. Note:- When no Tone Unit is installed, pressing the TONE key will not transmit a subtone, even if the indicator is ON. In Europe a 1750 Hz tone is used in transmit. Press and hold the TONE key to transmit the access tone, then press the PTT switch. In the United Kingdom a 1750 Hz tone burst at the beginning of each transmission is used. Press the Tone key. Since use of this tone is required in the Europe and the United Kingdom, an 1750 Hz tone encoder is encluded as standard equipment. Tone Frequency 67.0 Hz 110.9 Hz 173.8 Hz 71.9 Hz 114.8 Hz 179.9 Hz 74.4 Hz 118.8 Hz 186.2 Hz 77.0 Hz 123.0 Hz 192.8 Hz 79.7 Hz 127.3 Hz 203.5 Hz 82.5 Hz 131.8 Hz 210.7 Hz 85.4 Hz 136.5 Hz 218.1 Hz 88.5 Hz 141.3 Hz 225.7 Hz 91.5 Hz 146.2 Hz 233.6 Hz 94.8 Hz 151.4 Hz 241.8 Hz 100.0 Hz 156.7 Hz 250.3 Hz 103.5 Hz 162.2 Hz 107.2 Hz 167.9 Hz 18 • CTCSS (Tone Squelch) Operation 1. To actuate the CTCSS (tone squelch) function (decode) select the desired tone frequency as described above but do not press the CTCSS key the second time. 2. Squelch will now open only when the transceiver receives the same subtone frequency. 3. To release tone squelch operation press the CTCSS key. The CTCSS indicator should go out. It is a good operating practice to check the frequency before transmitting. A MONITOR switch has been provided for this purpose when using the CTCSS (tone squelch) function. Pressing this switch will open the squelch so you can check for activity. • TSU-6 (option) Installation 1. Remove the backing from the cushion (large) that was provided the TSU-6 and attach it to the back of the TSU-6. 2. Remove the Battery Pack and remove the four phillips head screws from the terminal plate of the transceiver. 3. Turn the terminal plate over and take out the cable as shown in the diagram. 4. Remove the clear tube covering the connector, and the resistor inserted into the connector. 5. Attach the cable from TSU-6 as shown in the diagram. 6. Remove the backing from the other side of the cushion and attach the TSU-6 to the transceiver. Insert connecter Remove clear tube (large) 7. Push up on the release button and set the terminal plate in the hole of the release button. Replace the terminal plate and tighten the screws to complete the installation. Do not pinch the wiring when closing the terminal plate. 3-6-4 AUTOPATCH (TH-25AT/45AT/55AT U.S.A. version only) ¿ome repeaters offer a service known as autopatch. This allows you to dial a telephone number from your transceiver and carry out a telephone conversation, much like a car telephone, or cellular telephone. This function requires the use of a DTMF (Dual Tone Multi Frequency) pad. In addition to the normal 1 2 keys that are found on your telephone the transceiver also provides 4 additional keys, A, B, C, and D. These keys are required by some repeater systems for various control functions. You should check with the control operator of ...
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equipamiento barco - TH-45A Series (3.49 mb)