My SR620 fails in its Self Calibration routine at "Cal Error 07". The Users
Manual describes this error as a problem with the "Start TAC" (Time to
Amplitude Converters) and indicate that this flags a Hardware problem in the
circuits which perform the analog interpolation between the 90 MHz clock ticks.
Anyone have any experience with this? Is this a repair shop problem or user
correctable? I am unable to find a "Service Manual" for this unit also. Many
thanks for any input. Jim Robbins
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