New (to me) APX Radio - cannot transmit on -p25 conventional

[gip127]

I bought an APX7000. It transmits fine on analog UHF/VHF. I tried transmitting on UHF conventional p25 and nothing comes across any other radio. I tried using three. The radio receives p25 conventional no problem.

Thoughts?

Time for a refund?

 

[quebecradioguy]

Might be stupid, but did you check your NAC?

 

[gip127]

Might be stupid, but did you check your NAC?

Yep. Multiple times... Pulled everything from a working apx8000...

 

[K2NEC]

You checked all of your personalities right? All the correct conventional personalities are in the right zone channel assignments? And the right conventional frequencies are selected in the table?

 

[gip127]

You checked all of your personalities right? All the correct conventional personalities are in the right zone channel assignments? And the right conventional frequencies are selected in the table?

Yes, I checked the codeplug over and had a buddy check it too. Everything is right

 

[MTS2000des]

Sounds like an alignment may be in order. P25 alignment is critical, a 100KHz off freq on analog won't really affect performance, but will render BER so high on P25 you get nothing. When was the last time the radio was aligned?

 

[KevinC]

Can you post your codeplug here?

 

[gip127]

Sounds like an alignment may be in order. P25 alignment is critical, a 100KHz off freq on analog won't really affect performance, but will render BER so high on P25 you get nothing. When was the last time the radio was aligned?

Unsure. The radio keys up, you see the red light/tx symbol but no other radio receives it...

 

[gip127]

Can you post your codeplug here?

Pm'ed you

 

[N4DES]

Unsure. The radio keys up, you see the red light/tx symbol but no other radio receives it...

If you open the squelch on one of the other radios do you hear anything?
My thought is the direct frequency is still the default and the box is checked in the personality.

 

[gip127]

If you open the squelch on one of the other radios do you hear anything?
My thought is the direct frequency is still the default and the box is checked in the personality.

nope. We narrowed it down to a tuning issue. Works fine higher up in UHF r2 range.

 

[N4KVE]

In a couple of my radios, the DEV BAL was out of spec.

 

[MTS2000des]

any dealer with a recent service monitor with auto tune software should be able to align the radio in a 1/4 to 1/2 hr labor max.

 

[gip127]

Thanks for the answers everyone. I am usually transmitting on a 460 range freq, I changed to 501 to try p25 and it worked. Proving the alignment theory. Alignment to follow

 

[slicerwizard]

a 100KHz off freq on analog won't really affect performance

I assume you mean 100 Hz.

 

[MTS2000des]

I assume you mean 100 Hz.

yep.

I have a DiagnostX on my trunking system that flags any RID with high BER or freq drift. as little as 50Hz and BER starts climbing.

 

[chrismol1]

yep.

I have a DiagnostX on my trunking system that flags any RID with high BER or freq drift. as little as 50Hz and BER starts climbing.

I wonder, will there ever be the day we see Autotune - Over The Air, it would keep adjusting and TX feedback until it hits the values it needs while using LTE or something as a secondary feedback line. I have no idea if that'd ever be feasible. That'd be an advancement, sorta like apx next lte programming anywhere, things are different than the old days. Its still cool to me, to program my XPR7550e over wifi without touching a cable to it

 

[slicerwizard]

IIRC, iDEN had autotune ages ago.