RX Problems

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gatekeep
Posts: 206
Joined: Sat Aug 12, 2006 12:10 pm
What radios do you own?: XTS2500i III, AS III

RX Problems

Post by gatekeep »

I have a problem with my Astro Saber radio (yes this was previously posted, however, I removed the original post to clarify things), it has a problem decoding the PL/DPL on certain channels.

For instance I have 460.4125 with a DPL of 115. The radio is set to 12.5khz channel separation as per the license for this channel (note that it is a public safety frequency set to RX only). The radio will receive traffic on this channel but will not properly decode the tone and unmute. I have noticed with some channels that modifying the channel spacing will fix this issue, but on this channel I have been unable to solve the problem.

The license for this specific frequency specifies a channel bandwidth of 11.2khz I assumed this would equate out to 12.5khz channel spacing. If I am wrong and need to be pointed in another direction please inform me.

[EDIT]I might add, that I have 100+ personalities in the radio, and only a few frequencies such as the one specified exhibit this problem, all my GMRS/HAM channels Rx perfectly. (With this in mind, could I assume that the repeater on 460.4125 is at fault?)[/EDIT]
- Bryan
"So the best solution is to paint them to blue color and throw them to the sea?" in reference to MTS2000 F01/93.
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Josh
Posts: 1931
Joined: Mon Sep 03, 2001 4:00 pm
What radios do you own?: APX4K, XTL5K, NX5200, NX700HK

Re: RX Problems

Post by Josh »

If it works correctly as 25Khz, then use 25Khz even if its wider than the license allows.

What it could mean is that the radios used by the PS department are wide-band.

For me, the differences programming narrowband on a wide-band channel is audio clipping and false muting on PL enabled channels, which seems to be similar to the issue you're having

I've also had issues with astro when programming a narrowband channel as wide-band because range was significantly decreased and desensed by adjacent frequencies.

-Josh
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