moro
Member level 3
Hello all,
in a production test equipment, on the tested pcbs ( DUT) there is a measurment of a RTC signal ( 32768hz nominal)...
The signal is measured trough a keysight 53220A counter.
The signal is routed from the tested pcb via a test probe trough a 1 meter long wiring harness -> contact switching matrix -> counter
The problem which occurs is on the counter the deviation of the RTC signal is quite large ( +/- 20hz), how can i compensate this wiring capacitance/loss? i tryied to use a 50ohm coaxial cable, but i am limited by the hardware in the sense that i need to go trough the switch matrix, where i have other 300 probe signals ( voltages/pwms).
Any ideas how to improve this issue?
Thanks
in a production test equipment, on the tested pcbs ( DUT) there is a measurment of a RTC signal ( 32768hz nominal)...
The signal is measured trough a keysight 53220A counter.
The signal is routed from the tested pcb via a test probe trough a 1 meter long wiring harness -> contact switching matrix -> counter
The problem which occurs is on the counter the deviation of the RTC signal is quite large ( +/- 20hz), how can i compensate this wiring capacitance/loss? i tryied to use a 50ohm coaxial cable, but i am limited by the hardware in the sense that i need to go trough the switch matrix, where i have other 300 probe signals ( voltages/pwms).
Any ideas how to improve this issue?
Thanks