User's Manual

TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TDFM-136A Operating Instructions Page 2-33
TiL 09RE405
Digital Mode 'g' The digital squelch mode 'g', is valid for receive and transmit only. For
receive it indicates that any non-encrypted P25 compliant digital signal,
having the correct NAC, and the correct TalkGroup will be received. For
transmit it indicates that the specified NAC and TalkGroup codes will be
transmitted.
Digital Mode 'i' The digital squelch mode 'i', is valid for transmit only, and indicates that
the transmitted signal will carry the ID of a specific radio. Only a radio
with that ID programmed as its UNIT ID (see command L2-9), should be
able to receive that signal.
Digital Mode '-' The digital squelch mode '-', is valid for transmit only, and indicates that
transmit is disabled for this memory.
ID Call Operation
The radio can be configured, in digital mode, to use ID call as a selective squelch method, in this
mode the transmitting unit sets it's TalkGroup to zero (0), and transmits the intended Unit ID
number (decimal 0 to 9,999,999), upon seeing the '0' talkgroup, the receiver ignores everything
except the ID number.
Of course the receiver will have to be on the correct frequency, and in digital mode.
The TDFM-136A has two (2) distinct RF modules (Main and a dedicated Guard receiver). Unit
ID's are not selected at the factory (all units ship with default IDs of 1 for Main and 2 for Guard),
so each of these needs to have a Unit ID programmed.
Scan Operation (L1-5, L2-5, L3-5)
The radio supports a basic scan mode that operates on the Main channel only. The scan function
allows users to monitor up to 16 channels at a time. All memories must be a member of one, and
only one, scan list; each scan list can hold up to 16 memories. Each memory in a scan list can be
enabled for scan or disabled (see command L2-5).
To scan a particular list: the radio must have a memory, with its scan enabled, selected for the
Main channel.
Example: There are seven (7) memories assigned to scan list three (3), channels 5, 6, 13,
15, 23, 34, and 51 are all members of scan list 3. Channels 6 and 15 have scan disabled, the rest
have scan enabled. If the user is on channel 6 or 15 and tries to start scan (command L1-5),
there will be an error message: “Error: Non-Scanned Chan” and nothing will happen. If the user is
on any other channel in scan list three, then the five scan-enabled channels in list three will be
scanned.
You can enable or disable scan for the displayed memory (for Main channel only) by using the
command L2-5.
You can affect the scan operational parameters by using command L3-5. This command allows
you to affect the following four (4) parameters:
• Revert Mode
• Reply Timer
• Monitor Timer
• Delay Timer