[time-nuts] External Frequency Standard Inputs on Counters
ed_palmer at sasktel.net
Fri Apr 3 06:51:42 UTC 2009
I see that on many counters (e.g. SR620, HP 5370, HP 5372) the external
frequency standard input has an impedance of 1Kohm. Why such a high
value? Are they implying that it's acceptable to daisy-chain a single
reference to multiple devices like an old 10Base2 ethernet network?
Should such a link be terminated in 50 ohms like a 10Base2 network?
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