User's Manual

2-6

2.10 LED DISPLAY VARIABLE DIMMING MODE

1. With the transceiver in normal operating mode press the UP or DN keys to increase or

decrease the intensity of the LED display.

2. Once maximum intensity of the display is acheived, the UP key no longer functions.

Conversely once minimum intensity is reached, the

key ceases to function.

2.11 90 SECOND TRANSMITTER TIME OUT FEATURE

A selectable 90 second transmitter time out feature is provided to prevent accidental

continuous transmission in the event of a faulty PTT switch. With this feature enabled the

transceiver will stop transmitting after the PTT is engaged continuously for 90 seconds. The timer

is reset by releasing then re-engaging the PTT switch.

Press the FUNC then the M.UP key. Use the M.UP and M.DN keys to select 90 SEC, which

enables the feature, or NONE which disables it.

2.12 QUICK GUARD PROGRAMMING FEATURE

A quick download of any of the 100 memory positions to either of the guard memory positions can

be accomplished. Select the memory position whose contents you desire to download to a guard

memory. Select either GD1 or GD2 memory channel as desired. Press FUNC then 7. The guard

memory channel will now contain all the same information as the selected memory position.

2.13 PROGRAMMING CTCSS TONES

NOTE: The TFM-138 supports only CTCSS tone functions. DPL code functions are not

supported.

CTCSS tones (PL tones) can be assigned to each memory channel. The guard receiver squelch

will operate only on carrier detection, but guard 1 and 2 transmit tones can be programmed. To

program a CTCSS tone to a memory channel:

1. Use the

M.UP

and

M.DN

keys to select the memory channel that you want to assign

a CTCSS tone.

2. Press the FUNC key then the TONE key. The display will show "RX TONE:" and the

current tone number, as well as the tone frequency in Hz.

3. Use the M.UP and M.DN keys to select the tone number you require. The following

is a list of the available CTCSS tones:

Number

Tone Number Tone Number Tone

01 67.0 26 162.2 51 177.3*

02 71.9 27 167.9 52 183.5*

03 74.4 28 173.8 53 189.9*

04 77.0 29 179.9 54 196.6*

05 79.7 30 186.2 55 199.5*