Unit installation

6-20
RLC-3 V1.80 Copyright © 1998 Link Communications Inc. 9/17/98
up). Turn the generate function off. To make sure that the DVR is set up and working, use an HT
to enter Command 170, unkey, key and say something, then unkey and listen. The DVR should
play back whatever you said. If it does not, review the interfacing and testing sections above. Now
key and enter Command 170 and unkey, then turn the service monitor's generate function on. This
will cause the DVR to record the 1KHz tone into track 0. Adjust the voltage at pin 1 of the DVR's
audio test bus for one volt peak to peak. When you get it adjusted or after 30 seconds (when the
DVR will automatically quit recording), turn the generate function off and enter Command 174 0 D
or unkey to erase DVR track 0. Repeat entering Command 171 0 D or unkey, recording the tone
and erasing it with Command 174 0 D or unkey until you are satisfied that the record level is set,
then record the 1KHz tone into DVR track 0 once more and don't erase it. Play it back by entering
Command 173 0 D or unkey. While it is playing, adjust the voltage at pin 3 of the DVR's audio
test bus for one volt peak to peak. Command 173 0 D or unkey may be entered as many times as
needed to get the level set. This sets the DVR to play back tracks at the exact same level they were
recorded at. If the transmit level is set correctly on the controller, playing this track should cause
about 3KHz of deviation. Finally, erase track 0 by entering Command 174 D or unkey.
The Audio Check Command:
Before executing any DVR commands on the RLC-3 you should enter Command 182 1 D or unkey
to tell the RLC-3 that the DVR is installed. The controller will respond by saying "one". If you do
not do this, some of the commands will work, but others will not.
The easiest way to test the DVR is to execute the "Audio Check" command. To use it, simply key
your radio and enter "Command 170", then unkey. Key up again and say something. When you
unkey, the DVR will play whatever you said back to you, then erase it. If this command works,
you have the DVR connected and working. You can execute this command as many times as you
want to without harm and without wearing anything out. It can also be used to help you know if
your signal is noisy into the repeater; just use this command to record a test message and you can
listen to your own audio. Yet another use for this command is to find out how much record time
(memory) is still available. To do this, start recording and count off the minutes and seconds you
have been recording. When the DVR's memory is full, it will stop recording. When you unkey and
the message is played back, you will hear yourself count as long as the DVR was able to record
before it ran out of memory (this could take a long time if the memory is not almost full - if it takes
too long, the max record length timer could stop it before the memory is full).
Recording DVR Tracks:
Before recording a track, you should make sure it is empty. If a track has already been recorded,
you will not be able to record it again until you erase it. All tracks are empty when the DVR is
powered up.
To record a track using COR to start and stop the recording, you should enter the record command
followed the track number, "171 TTT" (where TTT is the track number), then unkey (to tell the
controller to execute that command and get ready to record). Then key up and start speaking your
message. When you are finished, simply unkey. The DVR will automatically delete a fraction of a
second of the beginning and end of your message to get rid of any noise caused by keying or
unkeying.