Anritsu Company Site Master S312D, Maintenance Manual, Page: 16 / 62

2-4 InstaCal Module Verification Performance Verification
2-6 PN: 10580-00195 Revision B S312D MM
6. Verify that the calibration has been properly performed by checking that the
CAL ON!
message is
displayed in the upper-left corner of the display.
7. Remove the InstaCal Module from the RF Out port and connect the 20 dB Offset (SC5270) to the RF Out
port.
8. Measure the return loss of the 20 dB Offset. The level should be 20 dB ± 2 dB across the calibrated
frequency range.
9. Remove the 20 dB Offset from the RF Out port and connect the 6 dB Offset (SC5237) to the RF Out port.
10. Measure the return loss of the 6 dB Offset. The level should be 6 dB ± 1.2 dB across the calibrated
frequency range.
Note
If this particular InstaCal Module has been used previously to calibrate this Site Master, then the
Site Master senses the familiar InstaCal Module and automatically calibrates the instrument by using
the OSL procedure.
If the Site Master senses that the characterization data for the InstaCal Module that is connected to
this Site Master is different than the characterization data that is currently stored, then it displays soft
key options to keep or to replace the InstaCal characterization data.
Pressing the YES soft key transfers all of the characterization data from this InstaCal Module to the
Site Master. The transfer may take up to three minutes. This option is preferred if this InstaCal
Module is to stay with this particular Site Master. After calibration is completed, the data need not be
transferred again for this combination of Site Master and InstaCal Module.
Pressing the NO soft key temporarily transfers only the portion of the characterization data that is
necessary for this particular calibration. This transfer takes approximately 30 minutes to 60 minutes
and must be repeated every time that a calibration is performed by using this combination of
Site Master and InstaCal Module.