UHF

Shawn Billings

Shawn Billings
5PLS
Sounds like maybe a short in the radio caused by heat
Works "cold" but then the amplifier quits when it warms up. Shut down briefly and it cools down enough to work again, briefly.
 

Matthew D. Sibole

Well-Known Member
5PLS
The BER is high. The only reason I mention it is when I try and use my LS as a base and my 35 watt as a repeater I see the same problem you are seeing and my BER is high as well. I do not remember what BER stands for. Matt Johnson may be able to help on this subject.
 

Donald E Robinson

Active Member
I had the same problem about a week ago. I would scan the frequencies and select a one that was good. Then when I set everything up, it would tell me to avoid that frequency.

I was using a marine battery that I kept charged on a "battery tender". I charged it with regular battery charger and I had no problems the next day. So, it appears it was the battery, in my case.

Also, since my last J-Field update, I noticed that the UHF power (%) is no longer displayed. Everything seems to work OK, though.
 

Shawn Billings

Shawn Billings
5PLS
When your base radio is transmitting, the scan results are going to show to avoid that frequency, because there is traffic on it... your base. The scan only works when your base is NOT transmitting.
 

Donald E Robinson

Active Member
The Avoid did not appear when I was scanning the frequency. It appeared after I sent the new selected frequency (that was shown to be good during the scan) to the T2 via Bluetooth. Also the Bluetooth icon would alternate between red and blue. I would get a message that the uhf antenna was too far from the Base. They were only about 25' apart.
 
Donald: The percent display disappeared on my LS/T2 setup about a month ago; I've kept up with all the updates. Matt Johnson is looking into it.
Also, I'm getting the same Bluetooth red to blue fluctuation even with the units in close proximity. My equipment was new in July 2017.
 

K Davis

Member
After switching to DQPSK from D8PSK I have had no problem with the radio link, even on 80 degrees days over several hours.

I have been using the 35 watt radio as a repeater from time to time so the modulation has been set at D8PSK.

But most of the time I just use the 1 watt so I think my problem was that I had the modulation set wrong.

In a previous post, Matt Sibole mentioned that the BER was high.

At DQPSK it stays at zero and the LQ stays at 100% on all small to medium size projects (before it was never above 90%)
20190422-17.11.46_00058_UHF_Status_422.png
 

K Davis

Member
Most of the time it was at the full 1 watt.

My experience in the last 2 weeks doesn't show any evidence of overheating as it has been working perfectly.

But it's warming up next week so I'll see how it does.
 
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