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Timmus66 · 14th Apr 2019, 2:12 pm

Good afternoon,

I have recently acquired a Marconi TF2171 Digital Synchronizer unit to go with my Marconi TF2015 signal generator, I have two TF2015’s and have tried them both with the TF2171.

When the TF2171 is cold and first switched on and locked in to a frequency, the frequency readout on my counter is reasonably stable, after about 30 minutes or so of warm up time one would expect the unit to be even more stable or at least as stable, however this does not seem to be the case, after warm up the unit seems more unstable and the frequency readout seem to jump and dance about a fair bit.

Only having used this unit for a few days and not being that familiar with it I am wondering if this a normal characteristic of the TF2171 or if I need to investigate a bit? (capacitor issue maybe?), Any advice from those who have owned or used the same unit would be very much appreciated.

I have made two short video clips to show the problem, The first one is switched on from cold and the second one is after 30 minutes of warm up time.

https://www.youtube.com/watch?v=Pvy_...ature=youtu.be

https://www.youtube.com/watch?v=RmPY0hJhCso

Thanks in advance

Tim

14th Apr 2019, 2:12 pm	#1
Timmus66 Triode Join Date: Nov 2017 Location: Essex, UK. Posts: 22	Marconi TF2171 Possible Problem? Good afternoon, I have recently acquired a Marconi TF2171 Digital Synchronizer unit to go with my Marconi TF2015 signal generator, I have two TF2015’s and have tried them both with the TF2171. When the TF2171 is cold and first switched on and locked in to a frequency, the frequency readout on my counter is reasonably stable, after about 30 minutes or so of warm up time one would expect the unit to be even more stable or at least as stable, however this does not seem to be the case, after warm up the unit seems more unstable and the frequency readout seem to jump and dance about a fair bit. Only having used this unit for a few days and not being that familiar with it I am wondering if this a normal characteristic of the TF2171 or if I need to investigate a bit? (capacitor issue maybe?), Any advice from those who have owned or used the same unit would be very much appreciated. I have made two short video clips to show the problem, The first one is switched on from cold and the second one is after 30 minutes of warm up time. https://www.youtube.com/watch?v=Pvy_...ature=youtu.be https://www.youtube.com/watch?v=RmPY0hJhCso Thanks in advance Tim