No...we monitor 75M in San Antonio (and perhaps another site) and 40M in Dallas and Atlanta or sometimes the reverse depending on what our propagation study for the instant says. We monitor from say 07:00 to 09:00. We communicate with each other via a UHF link system. At 09:00 San Antonio, Dallas and Atlanta change to 40M generally 7265 or 7285 depending on Incident communications requirements. We monitor 40M until 17:00 when we go back to the 07:00 to 09:00 configuration. At 18:00 or 19:00 we all change to our 75M. Sence we have many station who may check in, its imperative that we monitor all the time. Many stations who come up will not have ALE.
If there is no traffic listed for 15 minutes or no net traffic, we will call for traffic. Since most of our radio operators has another primary job, such as dish washer with our feeding units or mud scrapper with a clean out unit or chainsaw operator with a chainsaw unit, its not uncommon for a radio operator to miss the exact 15 minute mark.
We also have prime times which we call the Dr. Pepper Net Calls. They are at 10:00, 14:00 and 16:00 (10, 2 and 4). All morning reports must be in not later than (NLT) 10:30, by 14:30, another report is due and by 16:30 all logistic requirements for the next day must be in. Finally by 21:00, all unit reports (especially feeding units reports) must be in.
So yes, our net is quite different than other types of operations. During the day we usually have some request or messages between the victem relief units and our operations centers in Dallas or Atlanta as will as any other message traffic. We do have satellite internet capability; however, we have noticed that even with this capability, we never know just how long it takes for someone to read a message and the system send back a return receipt. Also, if they don't understand something, they have to send and E-Mail and we have to answer it. When sending traffic on HF directly to the operations center, if there is a questions, it is asked immediately.
As for Digital Voice, I have found that the signal required to make the ARO DV work as you would expect is about the same signal as you would want of Q3-4 voice copy...about a 10-15 dB SNR.
I hope this helps.
73,
Walt/K5YFW
-----Original Message-----
From: digitalradio@yahoogroups.com
[mailto:digitalradio@yahoogroups.com]On Behalf Of expeditionradio
Sent: Thursday, March 16, 2006 3:09 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] ALE in Emergency HF use (Re: Another look at A
LE)
--- In digitalradio@yahoogroups.com, DuBose Walt Civ AETC CONS/LGCA
<[EMAIL PROTECTED]> wrote:
>
> Our nets run from 07:00 to 21:00 while deployed with 15 minute
netcalls if
> there is not traffic. But yes I am aware of ALE's capability.
Rather than
> muting the station with ALE or SELCALL, I would rather be runing digital
> voice with the AOR digital voice modem.
>
> Walt
>
Hi Walt,
That AOR digivoice system is really nice for single frequency
monitoring. It is almost like a private intercom! But alas, it takes a
big signal to trigger it.
I'm also trying to understand how your net works... do you change
frequencies between 40m and 80m and listen every 15 minutes every day?
Bonnie KQ6XA
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