U9361C/F/G/M RCal Measurement Guide 7
Getting Started
RCal I/O
External 10 MHz Reference
RCal’s signals are synthesized from an internal 100 MHz clock. For the best
possible measurement accuracy, it is recommended that RCal be connected to
the external 10 MHz Ref Out from the signal analyzer, or another reference that
both RCal and the analyzer are locked to. The default setting of the RCal is Ref
= External.
RF Output
The RF Output connector on the RCal module is the physical point where the
calibration data applies.
An adapter may be needed between the RCal output and test port where
calibration is desired. Use the shortest and highest quality connectors possible.
Mismatch errors can be reduced with small fixed attenuators, such as a 6 dB
attenuator.
Higher frequencies require smaller connector geometries, such as 1 mm. To
avoid damaging these fragile connectors, please follow the recommendations
in “Connector Care” on page 22.
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