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[aprssig] APRS D700's at EOC

Robert Bruninga bruninga at usna.edu
Fri Jun 18 13:44:18 UTC 2010


APRS Channels

At our local EOC (emergency Operations Center), they have two
D700's and and additional four in GO-kits which we will be
programming FOUR channels for APRS use on side A with these 4
names and settings:

1 APRS-107  <== Muted APRS witch CTCSS 107 (with calling)
2 APRS-VA   <== Normal APRS with CTCSS 100 for voice alert
3 APRSmute  <== Muted APRS with DCS xxx
4 APRS-raw  <== APRS with no squelch for channel assessment

With the above 4 channels, there should never be any need to
touch the volume control on the APRS radio side A.  It should
always have the volume up to normal volume to receive calls.
The operator can select any degree of noise free operation with
those 4 channels.

1) APRS-107  Normal setting is APRS 107 which is basically APRS
with voice alert, but with the local PL tone for our club.  This
keeps the radio QUIET, but if someone really did want to get the
attention of the crew at the EOC (no matter where they were
listening, they could key up on APRS with PL 107 and call them.

2) APRS-VA  For knowledgible operators, they can set normal
Voice Alert if they want a proximity detector to know when other
Voice Alert stations are in range. I would call this channel
APRS-VA except that since we are adjacent to the State of
Virginia, too many people will think it has something to do with
that state instead of Voice Alert.  SO in our case, I will label
this channel as APRS-100.

3) APRSmute  Using the APRS channel with a random DCS basically
means the speaker squelch will NEVER Open.  SO in effect, this
is APRS MUTED operation without having to touch the volume
control.

4) APRS-raw  Choose this channel to quickly listen to the APRS
channel for any kind of troubleshooting without having to go to
TONE menues.

Again, the purpose of these 4 channels are to make sure that the
APRS radio always powers up in the best configuration for
immediate use.

A) Have a default for the radio to power up that is quiet
B) Make sure no one ever has to touch the SQUELCH or VOLUME
settings.
C) But the APRS operator in the EOC can be reached if needed

THen we will have the following PM Program Memories:

PM1 - APRS using the front panel.  Band B on local UHF channel
PM2 - APRS packet mode to PC client software.  Band B on UHF
PM3 - Voice Operation. Band A and Band B set for desired
channels
PM4 - Voice and BAND SCAN
PM5 - Still thinking... About this one..?

Bob, WB4APR




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