Batboard

I have a Jedi portable with European firmware - its a GP900 but looks identical to a HT1000 but has 5 Tone signalling.

I am about to try and lower the squelch threshold for 12.5KHz spacing so that the radio opens on weaker signals.

A few years ago I attempted to do the same with another Jedi GP900 portable but the squelch settings for 12.5KHz spacing kept defaulting back to the 25KHz spacing squelch settings each timed I looked at the 12.5KHz squelch settings in Service Mode.

I finally figured out what was happening when I was programming a Visar with USA firmware (rather than European firmware). With the USA firmware, the 12.5KHz squelch setting is stored as an offset of the 25KHz squelch settings (I think). There is an offset figure (say -3) which I guess is an average of the difference between the 25KHz and 12.5KHz squelch settings...so you can never actually view previous actual individual 12.5KHz squelch settings??

With the European firmware , there is NO mention of any offset in the Help Pages and NO offset figure displayed on the RSS Service Mode screen.

When I start tweaking, I always like to know the previous settings so I can revert. This is my question:

- If I view the 12.5KHz squelch settings, will I see the actual 12.5KHz squelch settings OR just the 25KHz settings?? - so I will never know the exact 12.5KHz squelch settings.

- If I just adjust the 25KHz squelch settings, will this automatically lower the 12.5KHz squelch settings - assuming the squelch offset is maintained - OR do you actually need to go into the 12.5KHz squelch settings to lower the 12.5KHz squelch threshold??

Thanks

Most radios don't show any difference in squelch break with 25 or 12.5 kc deviation. I had a tech here that was driving me crazy over this, but after some lab style testing, the difference was minimal, he actually bricked a few messing with the settings. If you want to know our actual difference it was about .1 uv, and since we actually increase our squelch for .4 it didn't make sense to mess with it.
On your radio I suspect that the firmware may not be capable of 12.5 kc tuning. The radio model format if it follows with the U.S. standard would have to be greater I believe than an AN suffix in the model number. Check here in batlabs for more info on the HT1000.

My GP900 Jedi is a real 12.5/20/25 KHz radio - 12.5KHz spacing has been a requirement in Europe for 20 years!!!

I lowered the 12.5KHz spacing squelch setting by ONLY lowering the 25KHz settings in Service Mode. So it looks like the 12.5KHz offset was maintained.

The original 25KHz squelch settings were around 35 and I lowered them to 27. The 12.5KHz squelch now opens on very weak signals.

I recently adjusted the squelch settings on my MCS2000 and the 25KHz and 12.5KHz minimum threshold levels (for reliable SQ closing) were very close - around 35 for 25KHz and 32 for 12.5KHz. The advantage of the MCS2000 is that the squelch level is User Adjustable. So you can set "level 1" to open on noise for DX working but then increase the level to say "3" to copy only fully workable signals.

Interestingly, the squelch level on my MCS2000 was originally set to almost maximum (61 out of 63). There is also an additional squelch level on a per channel basis (default is 0) ..and even this was set to 3 on all channels. I think this was done for trunking operation to make sure that the MCS2000 did not hang on to weak trunking channels and jumped to a stronger channel.