Astro Mode In Repeater

This forum is dedicated to discussions pertaining specifically to the Motorola ASTRO line of radios (those that use VSELP/IMBE/AMBE), including using digital modulation, digital programming, FlashPort upgrades, etc. If you have general questions please use the General or Programming forums.

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hvacesu78
Posts: 116
Joined: Wed Dec 12, 2001 4:00 pm

Astro Mode In Repeater

Post by hvacesu78 »

Was just wondering if I can operate In Astro (IMBE) Mode (UHF) on a conventional repeater?
I remember seeing a post here sometime ago about this topic
I think It needs to be an 'open' (non PL) repeater ?

Any information on this topic, ideas/comments appreciated
:lol:

Thanks !
Jon
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Pj
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What radios do you own?: X9000 thru APX

Post by Pj »

As long as the repeater doen't require a PL, you should be all set. Same goes with DVP etc.
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Caffiene
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Joined: Sat Jun 01, 2002 8:06 pm

ASTRO On A Repeater?

Post by Caffiene »

Wait a second. It shouldn't work. The ASTRO signal is a 4 level FSK signal. How could a 4-Level FSK signal that is detected by a FM receiver and then re-transmitted as FM (not FSK) be decoded by a receiver looking for FSK?. I don't see how it could work.
I am using the words "shouldn't" and "could" instant of "won't" because I've seen some strnage things in electronics over the years.
Never say never.
-Shawn
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fireradio
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What radios do you own?: Various APX series

Post by fireradio »

Yeah, I've been under the impression that you need a data-compatible repeater to repeat IMBE or Securenet, etc...
OSS
"Keeping public safety on the air..."
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vks737adelaide
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Post by vks737adelaide »

Unfortunatley your right only a ASTRO signal is a 4 level FSK signal can be detected by a ASTRO signal is a 4 level FSK signal repeater and hence can only be used in conjunction with each other....the other problem will need a data-compatible repeater to repeat IMBE or Securenet ids and changing encryption keys
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Twisted_Pear
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Post by Twisted_Pear »

The references I've seen in Motorola manuals say only Quantars can be used for ASTRO, though the manuals are many years old. I'm sure any APCO-25 repeater should work. It would prove difficult to make a non-digital repeater ASTRO compatiple.
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