User's Manual

2-1
SECTION 2
OPERATING INSTRUCTIONS
2.1 OPERATING FEATURES
The equipment has several important operating features which provide maximum flexibility,
performance and versatility. These features are outlined below. New features provided in TFM-
138 units of s/n 1540 and up with F10-B software are indicated by an “*”.
1. 100 memory positions* which can each be programmed with a transmit and receive
frequency with 25 or 12.5 kHz channel spacing*, Tx/Rx CTCSS tones and a 9-character
alphanumeric title.
2. 2 guard channels which can each be programmed with a Rx frequency with 25 or 12.5
kHz channel spacing*, CTCSS Tx tone and a 9-character alphanumeric title.
3. Scanning of preprogrammed memories with selective memory scanning*.
4. Priority scan of memory channel 1, if desired.
5. Direct frequency entry mode.
6. Receive frequency simplex function.
7. Switchable RF output power between 1 watt and 8-10 watts.
8. Lockout of keyboard to prevent inadvertent entries.
9. Variable frequency mode to manually scan up and down in 2.5 kHz steps.
10. LED display variable dimming mode.
11. Selectable 90 second Tx time out feature.
12. Quick download* of any of the 100 memory positions to the guard memories.
13. PC Memory download capability. (Does not upload memories from the transceiver).
2.2 OPERATING INSTRUCTIONS (See Figure 2-1)
1. Switch power on by turning the main volume clockwise. The last programmed
frequencies will be displayed. The transceiver is now in normal operating mode.
2. Adjust the audio level by adjusting the main and guard volume knobs.
3. Pressing the squelch defeat button will open both receivers to confirm they work.
4. The top display line will indicate which memory is selected followed by a "+" if the memory
position is in the scan list, an alphanumeric message, and the frequency of the main
receiver. A small "n" before the frequency indicates 12.5 kHz narrowband channel
spacing is in effect on this memory position. In the receive mode, the frequency is
followed by an "RT" if a RX CTCSS tone is programmed, or an "RX" if no Receive tone is
programmed. Similarly, in the transmit mode either a "TT" or "TX" is shown after the
frequency. The bottom line indicates similar information about the guard receiver.