XPR7550 VHF squelch threshold - how to lower "normal" level?

[g8tzl2004]

I have just updated the firmware in my VHF XPR7550 from R02.30.13 to R02.40.00.

I noticed that with the later firmware the squelch opening threshold for 12.5KHz narrow band settings was slightly lower ie the SQ opened on a slightly weaker signal but still not as good as 20KHz levels. The 12.5KHz hysteresis level was also higher than 20KHz levels ie a weak signal is not held as long using 12.5KHz spacing.

I presume the SQ threshold and hysteresis settings are factory set and stored in the codeplug?

In general, the SQ level is still just a bit too high (even with the later firmware) with my VHF XPR7550 so I am missing weak but copyable signals - I can copy the signal OK when I use the Monitor key to open the SQ (to give white noise).

Has anybody experimented to adjusting the default SQ levels. With all my other Motorola stuff you can set the SQ to open on the weakest of signals but with the XPR7550 there are only 2 levels (normal/tight) and the normal level at VHF is still too high. The SQ level with my UHF XPR7550 is OK.

Who at Motorola though that it was a good idea to switch from having, say, 15 different SQ threshold levels ie 0 - 15 with 0 being open squelch...to just 2 levels (nornal/tight)

 

[Astro Spectra]

Typing "g8tzl2004" and "squelch" into Google gives 276 hits. I really don't think anyone has any more answers, the signal processing code in the '7550 is the same as the code in your '5550.

 

[g8tzl2004]

Its actually 10 hits NOT 276 hi hi

Maybe I'm obsessed with SQ levels

I read somewhere that's its possible to amend the CP and adjust the XPR7550 SQ levels by using QML or something... I guess somebody knows how but I've not yet found them? Maybe one day?

 

[Ice-T]

I imagine it's editable in the codeplug much like the audio values, with the right software & know how...I have neither, lol.

 

[g8tzl2004]

Thanks.

Anybody know how to edit the codeplug audio values?

 

[Notarola]

i think it was done once but for a very specific purpose and for a specific cps/firmware package.

 

[escomm]

Its actually 10 hits NOT 276 hi hi

Its actually 276 hits NOT 10 hi hi

 

[g8tzl2004]

When you actually look at them there is only 10 hi hi

Do you know how to use XML to amend a codeplug?

 

[Number 6]

When you actually look at them there is only 10 hi hi Do you know how to use XML to amend a codeplug?

We do not discuss such modification techniques on this site.