Specifications

CES SUPPORT 407-679-9440 Page 15 MAN79 © CES 2009
External COR polarity (2#)
External COR signal can be active high or active low. If this signal is normally at a low state goes to a high state
when carrier is detected (receiver squelch is open), program the polarity to active high. If this signal does the
opposite, program it to active low. (See Description of External COR input) To program this item 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).
2#0# = active low 2#1# = active high
Roger beep (3#)
The courtesy beep has three programmable options: (1) A tone will be generated every time the receiver carrier goes
away, (2) it also can be programmed to send a tone after one second after receiver carrier goes away or (3) can also
be turned off. 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).
3#0# = off 3#1 = on 3#2# = on with 1 second delay after receiver carrier goes
away
CTCSS (Continuous Tone Coded Squelch or Sub Audible Tone)
The RM-20 supports up to four (4) CTCSS TX tone pairs. Within each pair a separate transmit and receive tone
frequency can be programmed. For example, tone #1 can receive a specific tone and transmit the same tone or it can
receive one tone and transmit a different tone. Each tone pair works independently from each other. Codes 4#, 6#,
8#, and 10# correspond to TX tones 1, 2, 3, and 4 respectively. And codes 5#, 7#, 9#, and 11# to RX tones 1, 2, 3,
and 4 respectively. If all receive tones are disabled, the RM-20 will operate on COR only. Refer to tone chart in this
manual for tone number and frequency.
CTCSS during hangtime (12#)
When this code is enabled, the RM-20 will generate a CTCSS tone for the duration of the hangtime. A CTCSS TX
tone must be programmed. 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).
12#0# = disabled 12#1# = enabled
CTCSS Tone 1 command (13#)
This feature limits “over the air’ programming access to carriers with CTCSS tone 1. If this feature is enabled,
programming over the air and the auxiliary relay will be inaccessible unless the codes are accompanied by the
correct CTCSS tone. To enable or disable this feature, enter the command code followed by 0 or 1. (don’t forget to
enter a # (pound) between commands and the end of entry sequence).
13#0# = disabled 13#1# = enabled
Hang-time timer (14#)
This code will control the time which the transmitter will stay keyed after COR and CTCSS (if programmed) goes
away. The hangtime period can be programmed for up to nine seconds at one second intervals. To program the
hangtime period enter the command code followed by number of seconds required, (don’t forget to enter a # (pound)
between commands and the end of entry sequence). It can also be disabled if no hangtime is needed. The factory
default for this feature is 2 seconds.
14#0# = disabled 14#2# = 2 seconds
Interconnect PTT in (15#)
This code is only used in applications where a telephone interconnect (Phone Patch) is used in conjunction with the
RM-20. When enabled, it will control the PTT on the RM-20. This input can be programmed for active high or
active low. 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).
15#0# = disabled 15#1# = enabled