User's Manual

TDFM-136B Operating Instructions 08RE399
Revert Mode. The Revert Mode refers to whether the radio will, when keyed, transmit on
the currently selected memory channel, or on the last contacted memory channel. The radio will
only respond on the last contacted channel for a time determined by the Delay timer setting, once
the timer times-out, then the unit always transmits on the selected channel.
Default: last contacted
Reply Timer. The scan Reply time is the time that the radio will monitor a channel on which RF
was received, after all activity on the channel has ended (Rx or Tx). If there is further receive or
transmit activity on the channel, the timer will reset, and start again once the activity has ended.
When the timer times-out the unit will resume scan. If set to zero (0), the unit will resume scan
immediately upon the end of channel activity.
Range: 0-20s, Default: 3 seconds
Monitor Timer. This is the time that the radio will monitor a channel on which RF was received,
before resuming scanning. Once the timer expires, the unit will break and resume scan, if the value
is set to zero (0) then the unit will monitor the signal as long as it is received.
Range: 1-90s, Default: 10 seconds
Delay Timer. The Delay time is the time that the radio will remain monitoring a channel after
receiving on that channel has ended. If the timer is set to zero, (0), then the unit will resume
scanning immediately after receive activity ends. This is the timer that affects the Revert Mode
'Contacted'.
Range: 0-15s, Default: 5 seconds
2.3.2 Multi-Mode Operation
Multi-mode operation allows mixing of analog and digital operating modes on one frequency. In
effect, this mode allows one memory position to be set up as though it has multiple sets of
parameters associated with it. This manual will refer to this as 'shadow memory' operation: a
'primary' memory can have up to seven 'shadows' for a total of eight sets of operating parameters
(1 primary + 7 shadows).
The user invokes this mode by selecting an existing memory to be a 'primary' and assigning at
least one 'shadow' memory to it, the command to do this is L2-7. Each 'shadow' takes up one
memory position, just like a normal memory.
The shadows have certain restrictions:
• a shadow must have the same frequency as the primary
• a shadow cannot have scan enabled
• a shadow cannot transmit in digital ID call (i) mode
You can mix analog and digital Operating Modes, you can configure different shadows to have
different squelch parameters.
Shadow operation is much like scan in last contacted mode, once a signal has been received, the
user has a set amount of time to key the radio, the unit will transmit with the parameters of the
shadow that decoded the signal: in other words you will respond to the person who called you.
When mixing analog noise squelch with analog selective squelches, the noise squelch shadow will
delay decode for a short time to allow the selective squelch channels time to decode, if none of the
selective squelch channels decode a valid signal, then squelch is broken on the noise squelch
channel.
The radio will operate in Mixed Mode when the Main channel has any memory in the shadow
group selected (ie either Primary or any shadow). The only difference between selections is that if
the user keys the radio, other than to respond to a received transmission, then the radio will
transmit using the displayed parameters.
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