User's Manual

2-3
5. Only TX CTCSS tones may be programmed for the guard receiver. At the beginning of
each line, an LED indicates open squelch.
6. Set the MN/GD switch to main or guard transmit frequency.
7. Set the G1/G2 switch to the desired guard channel.
8. Set the HI/LO switch to the desired RF output power.
9. Select the desired memory by using the M.UP and M.DN buttons, or the RCL button
and a three digit number followed by ENTER.
10. To transmit DTMF tones, use the keyboard keys while holding the PTT button on the
microphone. The keyboard returns to its normal function when the PTT is released.
The display always shows the status of both receivers and the transmitter. The light at the left of
the top and bottom line indicates which receiver is receiving. The display also indicates which
memory channel is in use and which guard channel is in use.
A "TX" (no TX CTCSS toneprogrammed) or "TT" (TX CTCSS tone programmed) on the right side
of the display indicates whether the guard or main channel is active when transmitting. The
transmit frequency is also shown. In the receive mode the display shows “RX”beside the receive
frequency if no RX CTCSS tone is programmed and “RT” if a CTCSS tone is programmed.
When the transceiver is in either of the operating frequency or CTCSS tone programming modes
and you must respond to a call, click the microphone PTT once (the radio will not transmit during
this click). This will cause the transceiver to revert back to the normal operating mode and
communications with the caller can proceed in the usual fashion.
2.3 PROGRAMMING INSTRUCTIONS
To program one of the 100 memory channels in the TFM-138:
1. Press the
FUNC
key. The display will show the function prompt.
2. Press the PROG key. The display will show the current receive frequency with a
flashing curser on the second digit (The first digit is always a one <1>).
3. Type in the desired receive frequency. If you type in a frequency which is not a 2.5 kHz
step, the nearest valid frequency will be automatically selected.
4. The curser will return to the second digit. You can now retype the frequency if you
made an error or press
ENTER
to continue.
5. The transmit frequency will be displayed with the curser on the second
digit. Follow the same method as in step 3 and 4.
6. The channel spacing increment of either 25.0 or 12.5 kHz is now displayed. Use the
M.UP and M.DN keys to select the desired channel spacing for the memory position,
then press ENTER.