[time-nuts] Using a 5202 lock-in amplifier

John Pease john_pease123 at yahoo.com
Tue Aug 30 19:57:11 UTC 2011

The 5202 down converts by switching the LO on and off at a rate that is dependent on the input frequency. This on/off rate becomes the IF frequency. It is sort of like fractional N but worse. There is no image rejection. Some mixers and DDS's will clean its clock.
John Pease

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