1. We are using P25 Astro VHF in a conventional migration mode. We use P25 repeaters, as well as simplex. We operate VHF FM repeaters and simplex. We monitor several other agencies who are still in analog, and communicate with them on FM interoperability channels. Some of these agencies are running maximum deviation. We are constantly having to adjust the receive audio on the subscriber units, as the digital RX audio is significantly lower than the analog RX audio. I cannot find a way in the software to compensate for this. WHich doesn't mean that it is not there, I just cannot find it.
2. We dispatch for some users who have P25 radios. However, their channel is still in analog. They are attempting to gain access to our dispatch channel (which we restrict to our agency only) by using the justification of not having an emergency ID access. It appears that MDC signalling software is included in the RSS. //otorola has given me a quote to upgrade the Gold Elite and CEB in order to accomodate the emergency ID. As an alternative to MDC, is it possible for these users' radios to be programmed to pass the emergency ID data, without being given voice access to our channel?
3. Anyone know if and when low-to-mid tier radios from //otorola may be available? I prefer to keep my Moto system all Moto, but it is difficult to justify the expense of the Spectra and XTS3000.
4. Is there a remailer/discussion group out there that deals with the conventional P25 users? project25@yahoogroups.com revolves around the trunking types.
bjmcdaniel@att.net
Conventional VHF Astro questions
Moderator: Queue Moderator
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BJMCDANIEL
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- Joined: Sat Mar 02, 2002 4:00 pm
Sgt. B. John McDaniel, KE5PL
Midland County (TX) Sheriff's Office
GROL PG-10-15392
432-688-4613
Where am I now? http://www.findu.com/cgi-bin/find.cgi?KE5PL-10
Midland County (TX) Sheriff's Office
GROL PG-10-15392
432-688-4613
Where am I now? http://www.findu.com/cgi-bin/find.cgi?KE5PL-10
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Elroy Jetson
- Posts: 1158
- Joined: Mon Sep 03, 2001 4:00 pm
You wrote:
:" We are constantly having to adjust the receive audio on the subscriber units, as the digital RX audio is significantly lower than the analog RX audio. I cannot find a way in the software to compensate for this. WHich doesn't mean that it is not there, I just cannot find it.
I've never seen it, either, and I've been all over that software for a long time.
2. As an alternative to MDC, is it possible for these users' radios to be programmed to pass the emergency ID data, without being given voice access to our channel?
I don't think so. There is no provision in the software to allow data only transmissions, and I'm pretty sure of that.
Would it be feasible to assign another channel to those users as a secondary dispatch channel, with your primary channel's traffic patchable into it as desired? I know, it means another repeater and a reprogram of every one of those subscriber radios...but it might be a solution.
3. Anyone know if and when low-to-mid tier radios from //otorola may be available? I prefer to keep my Moto system all Moto, but it is difficult to justify the expense of the Spectra and XTS3000.
"Astro" (or "digital") means "expensive" in the Motorola language. However, RELM, via their Bendix/King product line, (and maybe under the RELM brand, too) does offer a full P25 solution at substantially lower costs. It is mil-spec 810C,D,and E certified, as well, so presumably it's of satisfactory build quality. There may be other sources of P25 hardware as well. Check out APCO's website: http://www.apcointl.org where you may be able to locate vendor lists.
Elroy
:" We are constantly having to adjust the receive audio on the subscriber units, as the digital RX audio is significantly lower than the analog RX audio. I cannot find a way in the software to compensate for this. WHich doesn't mean that it is not there, I just cannot find it.
I've never seen it, either, and I've been all over that software for a long time.
2. As an alternative to MDC, is it possible for these users' radios to be programmed to pass the emergency ID data, without being given voice access to our channel?
I don't think so. There is no provision in the software to allow data only transmissions, and I'm pretty sure of that.
Would it be feasible to assign another channel to those users as a secondary dispatch channel, with your primary channel's traffic patchable into it as desired? I know, it means another repeater and a reprogram of every one of those subscriber radios...but it might be a solution.
3. Anyone know if and when low-to-mid tier radios from //otorola may be available? I prefer to keep my Moto system all Moto, but it is difficult to justify the expense of the Spectra and XTS3000.
"Astro" (or "digital") means "expensive" in the Motorola language. However, RELM, via their Bendix/King product line, (and maybe under the RELM brand, too) does offer a full P25 solution at substantially lower costs. It is mil-spec 810C,D,and E certified, as well, so presumably it's of satisfactory build quality. There may be other sources of P25 hardware as well. Check out APCO's website: http://www.apcointl.org where you may be able to locate vendor lists.
Elroy
"...the digital RX audio is significantly lower than the analog RX audio. I cannot find a way in the software to compensate for this."
Look at F4-F3-F2-F3 "Audio Gain Options." You must be using RSS R08.60.00 or later. You must also have radio code that includes this option. I recall that this was first made available in the 4Q00 System Enhancement Release radio code. Note that the option will appear in RSS regardless of whether or not the radio code includes the feature, so if it appears to not work, check your radio code version.
The P25 list at Yahoogroups is not just for trunking. Conventional and conventional data questions do frequently appear.
John
Look at F4-F3-F2-F3 "Audio Gain Options." You must be using RSS R08.60.00 or later. You must also have radio code that includes this option. I recall that this was first made available in the 4Q00 System Enhancement Release radio code. Note that the option will appear in RSS regardless of whether or not the radio code includes the feature, so if it appears to not work, check your radio code version.
The P25 list at Yahoogroups is not just for trunking. Conventional and conventional data questions do frequently appear.
John
JohnG
Motorola
Schaumburg, IL.
Motorola
Schaumburg, IL.
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BJMCDANIEL
- Posts: 13
- Joined: Sat Mar 02, 2002 4:00 pm
I can't claim to know a lot about how astro radios are programmed - but I'll take a stab at something that might work.
Program a channel that you would want their emergency MDC pages to go over. Use the MDC mode steering to transmit on that channel, but do not assign that channel to a zone... I don't know if you can then use that personality to transmit or not, but I don't see how it wouldn't be worth the effort of trying.
-Alex
Program a channel that you would want their emergency MDC pages to go over. Use the MDC mode steering to transmit on that channel, but do not assign that channel to a zone... I don't know if you can then use that personality to transmit or not, but I don't see how it wouldn't be worth the effort of trying.
-Alex
