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Conversion of TR-502 Tracking Generator to the TR-503 R.F.Configuration

For the information of anyone interested, I finally managed to get my Tek TR-502 Tracking Generator working properly with a Tek 492 spectrum analyzer. It turned out all that was required was to change the 52.5 MHz crystal to an equivalent 55 MHz unit and to retune the 4-cavity, 2nd local oscillator filter from 2200 MHz to center on 2182 MHz. This filter has a square pass-band, steep sides, and it is only about 15 MHz wide. Thus, it is understandable why the tracking generator will probably not lock to the 2nd local oscillator signal without retuning this filter.

Fortunately, Tektronix provides a sweep tuning procedure in the manual, that uses the associated spectrum analyzer as both the sweep source and display. I obtained good results without having to alter the mixer coupling.

Bruce, KG6OJI

test_equipment/tracking_generator_-_convert_tr-502_to_tr-503_configuration.txt · Last modified: 2013/01/08 19:00 (external edit)
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