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Quantar no P25 mod OOB

This forum is for discussions regarding System Infrastructure and Related Equipment. This includes but is not limited to repeaters, base stations, consoles, voters, Voice over IP, system design and implementation, and other related topics.

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mogman
Posts: 120
Joined: Tue Aug 05, 2008 2:25 pm

Quantar no P25 mod OOB

Postby mogman » Thu Jan 19, 2017 7:46 am

Here I go again same problem I had with the Plus radio.
I have an R2 VHF Quantar, did the full alignment and it works beautifully down to 150 MHz, the C4FM test pattern gives a MOD FIDELITY of 1.2 well within specs and repeats with no issues.
Drop the TX frequency to 149 MHz or lower and nothing but turds, MOD FIDELITY goes to around 47 as in no P25 mod at all. it is still making full power just no P25 mod.
A quick search did not turn up anyone else complaining and I am sure tons are in 2 meter service so I am left stumped, maybe a firmware issue?
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mogman
Posts: 120
Joined: Tue Aug 05, 2008 2:25 pm

UPDATE

Postby mogman » Thu Jan 19, 2017 11:19 am

Bryan, W9CR has informed me that the EPIC III SCM board I have in the machine will not mod P25 OOB, will try another tomorrow.

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motorola_otaku
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Re: Quantar no P25 mod OOB

Postby motorola_otaku » Thu Jan 19, 2017 1:59 pm

Is it specific to the EPIC version, or the firmware? Firmware would be the only thing I could think of that would affect OOB modulation.
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mogman
Posts: 120
Joined: Tue Aug 05, 2008 2:25 pm

Re: Quantar no P25 mod OOB

Postby mogman » Fri Jan 27, 2017 10:39 am

It is specific to the EPIC version from what I understand, EPIC III SCM cards will not mod OOB.
I have now tried several different EPIC II cards with different firmware and all mod OOB OK


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