User's Manual

TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TFM-550 Installation & Operating Instructions TiL 99RE262 Rev A Issue 8
2-5
2.5 SCANNING FUNCTION (5 second talkback delay)
Select the band you wish to scan with the band switch. (You can not scan VHF Low band). To
start scanning of the memory channels, press FUNC then SCAN and then the number (1,2,3,4,5)
of the desired scan list.
The radio will scan through all the preset memory positions in the selected scan list (see above
paragraph for priority and selective scan features) and will lock on to the first active channel in the
scan sequence. It will remain on the channel until it becomes inactive. Scanning will resume again
after five seconds of inactivity. To exit the scan mode, press the SCAN key. This will cause the
radio to revert back to the normal operating mode.
If while scanning, you hear a call for you:
1. Respond to the call within 5 seconds. When scanning is interrupted by an incoming
signal, the channel will remain open for five seconds before resuming scanning.
2. During communications the five second timer is reset from the last Rx or Tx signal
encountered.
The radio resumes scanning once the Rx or Tx activity has ceased for more than five seconds.
The SCAN key must be pressed to exit the scan mode.
2.6 DIRECT FREQUENCY ENTRY MODE
This mode is designed to facilitate quick frequency selection during emergency and other
operational conditions requiring direct operating frequency selection. This operating mode is
disabled along with the programming mode when the internal disable jumper is set.
1. When the transceiver is in the normal operating mode, press FUNC and the desired
operating frequency. Example: 153.2750.
2. On the UHF band press FUNC and then 1 and the desired frequency. Example:
443.5500.
3. You will then be asked for 12.5 or 25.0 kHz channel spacing. Select with MUP or MDN
and press ENTER.
Please note in the above operation, after FUNC and "1" are entered, the LED display will show
memory channel "000" and then the remaining digits in the desired frequency are shown as they
are entered. No alphanumeric message can be entered in this mode. Operation on the new
frequency occurs in both transmit and receive (simplex only) modes. If RX or TX CTCSS
tones/DPL codes are required they must be programmed in afterwards.
2.7 RECEIVE FREQUENCY SIMPLEX FUNCTION (Repeater talk around)
The receive frequency simplex function allows you to quickly change the transmit frequency,
when operating on a split pair (repeater/semi-duplex mode), to the receive frequency to allow
direct communications. Example: If you are transmitting on 152.000 MHz and receiving 152.555
MHz, select VHF on the band select switch and press FUNC then UP to transmit on 152.555
MHz. To return to the split pair condition, you must recall the memory channel again. This is
quickly done by pressing M.UP for one step up, then back down one step with the M.DN key.