I wanted to post this slide from this months workshop.
Is there any difference between a LS vs LS+ In your testing?
If the RSSI values are more than 3 dBm lower than the expected values
Hi Matt,
I was using my LS and T1+ via UHF yesterday. The initial 90 mins of a topo it was taking 90 to 120 seconds to collect a point. The base was above me, in clear sight and the site was mostly open. The latter part of my survey it was taking 10-20 seconds to collect a point.
I suspect that the radio may not be working correctly and impacting the collection time.
The modulation should not affect the signal strength.I didn't realize when testing that the modulation should have been changed. It was set at d8psk.
It is 2^18 times lower than expected.If those numbers are correct, that's a difference of 54 db/m. If every 3 db doubles the power, does that mean my unit is seeing a signal 2^17/m lower than what is expected?
Link quality is rarely 100%.What was the link quality when you were having problems? If LQ is less than 100% then the communication loss is causing problems.
Got it, thank you.The modulation should not affect the signal strength.
It is 2^18 times lower than expected.
I was having the same problem with the external radio and T2.Have you tried your external base radio to determine rather the issue is with the LS or internal base radio?
What was the link quality when you were having problems? If LQ is less than 100% then the communication loss is causing problems.
Now that I am thinking back on the survey, when I started the base and attempted to survey, I immediately received a message to connect the external antenna. I was 10 ft from the base and the UHF icon was red indicating a poor signal. For the next 90 mins or so, the collection of points was 90 to 120 secs. I am in the middle of the survey, trying to understand the problem and the system suddenly is now collecting points in a reasonable time period. At the end of the survey I tested the signal strength. If I would have done this at the beginning of the survey there would not have been a measurement at 100 ft with the internal antenna.
I am working on a deadline this eve. I will send you a message if I finish early or perhaps you are available this weekend?I can look at the radio sometime when you have it setup and running if you want. It sounds like the LS needs a RMA for the radio.
The wire for the antenna could have broke or become disconnected. There is a switch that switches that antenna between the internal and external feed. If neither work then then the wire is probably broken before the switch.I can tell you that about the 2 years ago the nut that holds the uhf antenna male connector in place would continually loosen, allowing the connector to spin. At the time I was thinking that the wiring might be tightening up with every rotation. Perhaps this resulted in bad connection. Of course this does not explain the internal antenna not working.