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MAN79 © CES 2009
Morse code ID time interval (22#)
This command controls the time interval in which the RM-20 transmit the ID call letters. This feature is
programmable for up 90 minutes at 1 minute interval (1 through 90) and up to two hours with code 22#0#.
22#0# = 2 hours
22#3# = 3 minutes
Note: The initial ID will be generated at 5 minutes regardless of the time interval programmed, and at the rate on
which the time interval is programmed for thereafter.
TX time out timer (23#)
This timer will control how long the transmitter will stay keyed continuously. This command can be programmed for
up to 90 minutes at 1 minute interval and up to 2 hours with command 23#0#.
23#0# = 2 hours
23#2# = 2 minutes
TX time out timer penalty (24#)
The TX time out timer will control how long the RM-20 will remain inactive after the TX time out timer (Code
23#) has expired. If the RM-20 stayed keyed for the length of the TX time out timer, the unit will unkey the
transmitter and will stay in the idle mode until the TX time out timer penalty has expired. Once this timer has
expired the unit will switch back to normal operation. This code is programmable for no penalty or up to 30 seconds
at 1 second interval.
24#0# = no penalty
24#1 through 30# = 1 through 30 seconds
TX disable in (25#)
This code is normally used when two RM-
20’s are used for crossband application in order to keep both RM-20’s
from transmitting at the same time. To program this feature enter the command code followed by a 1 or 0, ( don’t
forget to enter a # (pound ) key between commands and the end of the entry sequence).
25#0# = disabled
25#1# = enabled
TX disable in polarity (26#)
This code controls the polarity of TX disable (code 25#) This command can be programmed for active high or active
low. To program this feat
ure enter the command code followed by a 1 or 0, ( don’t forget to enter a # (pound ) key
between commands and the end of the entry sequence).
26#0# = active low
26#1# = active high
COR only with CTCSS (27#)
This parameter enables the generation of CTCSS when the RM-
20 is in “COR Only” repeat mode. This mode is
enabled by setting all CTCSS RX program locations to 0 (Off). In this mode the unit can generate (transmit)
CTCSS even though it does not require CTCSS to be received.
To program this feature enter the command code as follows:
0=Off 1 = CTCSS #1, 2 = CTCSS #2, 3 = CTCSS #3, 4 = CTCSS #4
Don’t forget to enter the # (pound) key between commands and the end of the entry sequence.
27#0# = Off
27#1# = Transmit CTCSS Transmit Tone 1
