TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TFM-500 Installation & Operating Instructions
TiL 98RE243 Rev. N/C Issue 12
2-5
2.4
PRIORITY SCANNING, SELECTIVE MEMORY CHANNEL SCANNING AND SCAN
LISTS
Instead of breaking up the 200 channels into blocks for scanning, the TFM-500 has 5 scan lists
per band. Any of the 200 channels can be assigned to any one or 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. You
are not limited to the number of channels that you can scan at once.
The priority memory channel is always memory position number 1. The priority memory channel
is scanned every other step (i.e. 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 200 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, 5, or
M.DN
keys to toggle to the desired condition. The M.DN
button acts as a CLEAR while pressing one or more of the above numbers adds the memory to
the corresponding scan list or lists. Press
ENTER
when you are happy with your selection. 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.
NOTE:
Scanning can only be performed on one band (either VHF or UHF) at a time.
When
the transceiver is in the single mode (combined VHF and UHF audio) and the scan feature has
been invoked on one band, it will be interrupted when transmitting on the other band. In the Dual
mode, you are able to transmit on the second band without affecting the scan function on the first.
2.5
SCANNING FUNCTION (5-Second Talkback Delay)
Select the band you wish to scan with the band switch. (You cannot scan the guard). To start
scanning of the memory channels, press
FUNC
then
SCAN
and then the number (1, 2, 3, 4, and
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 five 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.
