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Re: RV75 Issues: Part 3


 

Have you checked the reference oscillator frequency?? It doesn¡¯t take much for this to put the entire system out of wack.? It¡¯s frequency should be 5.12MHz exactly. This is on the digital board. I have seen some synthesized radio¡¯s being off quite a bit because the reference oscillator is out of adjustment, but this seem excessive.

Clint,

Havent done this yet but its next on my list. But a bit of confusion here. The RV75 manual Section 5-5.3 REFERENCE OSCILLATOR ADJUSTMENT calls for a freq of 1.280000 MHz AT tp114, while your guidance is 5.12 MHz. On the schematic it appears tha TP114 is after a divider stage so this may account for the difference. I can see that this can create major problems if not set correctly. Thanks for the tip!

Rick
K8EZB

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