[time-nuts] Do I have a defective thunderbolt?

[Geraldo Lino de Campos]

I have a thunderbolt acquired from TAPR. Almost every time the number of
satellites change, there is an abrupt change in the DAC voltage – as high as
1 mv, sometimes. See
www.decampos.net\LH\LH1<http://www.decampos.net/LH/LH1>.png
- a graph with time constant 200 and Damping 4. Using much higher values
improve the situation, as can be seen in
www.decampos.net\LH\LH2.png<http://www.decampos.net/LH/LH2.png>, time
constant 1000 and damping 100 (note the change in the DAC scale), but
the jumps are still present.

Is this normal, or I have a defective unit?

The antenna is located in a window, with several buildings nearby, so the
change in the number of satellites is frequent.
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geraldo at decampos.net