User Manual

2-6
2.4 PRIORITY SCANNING, SELECTIVE MEMORY CHANNEL SCANNING AND SCAN LISTS
Instead of breaking up the 120 channels into blocks for scanning, the TFM-138B (with F14 software)
has 5 scan lists. Any of the 120 channels can be assigned to any one of more of these 5 scan lists.
This means the channels do not have to be repeated for them to be in more than one block and that
you are not limited to the number of channels that you can scan at once, since all 120 channels can
be put into any scan list.
The priority memory channel is always memory position number 1. The priority memory channel is
scanned every other step (ie. 121314151...) to ensure that no incoming messages are missed. The
priority channel can be locked out, which will result in the normal scanning of the other memory
positions.
Selective memory scanning allows the user to select which of the 120 memory channels are to be
scanned or locked out when the scan function is invoked. To use this feature, follow the
PROGRAMMING INSTRUCTIONS found in paragraph 2.3. Once the screen displays SCAN or
LOCKOUT, use the 1,2,3,4 or 5 key to add the channel to the corresponding scan list or lists. The
M.DN key acts as a clear button removing the channel from all scan lists and displaying LOCKOUT.
Press
ENTER
when you are happy with your selections. In normal operating mode the display will
later show a "+" beside the memory channel number if it has been included in any of the 5 scan lists.
2.5 SCANNING FUNCTION (5 second talkback delay)
1. 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.
Therefore 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 experienced.
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.
When the transceiver is in the normal operating mode, press FUNC and the desired operating
frequency ie/ 153.275. 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.