HT1250 Intermittent RX

[SouthSideQ]

HT1250, Software: R05.09.06, Model: AAH25KDF9AA5AN

I'm having problems receiving on a single channel, only when the transmission is coming from the dispatch center. Interestingly, only two HT1250's are having this issue. The radios receives without a problem when the transmission is from another portable or a mobile radio. Originally I thought the issue was related to Quik Call as I only noticed after paging tones. However, if I turn the portables on immediately after the tones, the intermittent reception is still an issue. On the display, the signal strength indicator is at full strength throughout the dispatcher's broadcast, yet the audio is clipped. Almost sounds like when audio drops during scan functions. This occurs regardless of scan settings. I have created a completely new personality for this frequency and verified other settings for the personality with radios that function without difficulty.

I'm only a novice at this radio programming junk. My department has the CPS software (06.12.04) and RIB. I do not have the capability (or know how) for firmware upgrades. Any thoughts or suggestions for additional troubleshooting or a fix is greatly appreciated.

(I tried searching first, also. Sorry if I missed a previous thread)

 

[chrismol1]

that sounds like some channel is on priority while scanning it will clip receiving audio

 

[SouthSideQ]

Exactly what it sounds like but occurs when scan is off and in different "zones" where that personality is not in scan list.

 

[RKG]

While long range, sight unseen, diagnoses aren't work the paper they're printed on, my guess would be that your system is sending the PL or DPL tones in use by your department at a minimal level, and the two radios in question are either enough off alignment or insensitive enough that they are not reliably decoding the PL or DPL. I have seen this show up for the first time are narrowbanding. The solution is for the system techs to goose the PL or DPL modulation a hair.

 

[SouthSideQ]

RKG, thanks for the reply. I had considered it happened shortly after/during a switch from our vintage Centracom controllers to the a digital console. As it turns out, that's about when they started narrow banding our FD channel, long before the police channel. I'll check with our radio people and see if they can give it a boost. Thanks for the idea.