NHRC-10 User Guide
Page 2
Copyright
1999, 2000, 2001 NHRC LLC. All Rights Reserved.
1.1 Sending commands
All of the controller’s commands are sent by DTMF (Touch-Tone
) sequences that can
be received on the main repeater, over the telephone, the control receiver (if connected),
or the link radio (if the control receiver is not connected).
Commands received over the main repeater or link radio will be evaluated, and if correct,
executed, when either the DTMF inter-digit timer expires (2.0 seconds) or the CAS
(receiver unsquelched) signal drops; whichever comes first. This allows the controller to
be commanded even when a weak on-channel signal is holding the receiver’s squelch
open.
The telephone and control receiver do not have a CAS signal available. Commands
received from these sources will be evaluated when the DTMF inter-digit timer expires.
To send a command
over the main repeater,
1. key your transmitter.
2. enter the DTMF command digits.
3. unkey the transmitter.
This will cause the command to be evaluated immediately.
If you pause for more than 2.0 seconds while sending a command, the command you
entered prior to the pause will be evaluated, the command buffer will be emptied, and
you can immediately enter another command.
When a command is successfully evaluated, the controller will send a response. Each
command’s possible responses are detailed with the command description.
In general, if you do not receive a command response, then the controller did not accept
your command.
1.2 ID Messages
The controller supports four voice ID messages and one CW ID.
The voice messages are comprised of:
•
an “initial” ID message, that plays when the controller has been idle for a period
longer than the ID timer, and
•
three “normal” ID messages.
Each of the normal ID messages can be individually enabled or disabled.
When more than one normal ID message is enabled, the enabled messages are played in
sequence; one each time the ID timer expires.
The CW ID will play when all the voice IDs are disabled, or when the repeater is keyed
during a voice ID message.