Anritsu 373XXA Chapter 4 Performance Verification

Chapter 4
Performance Verification
4-1 INTRODUCTION This chapter provides specific procedures to be used to verify that the
373XXAis making accurate, traceable S-parameter measurements. You
should perform the verification procedures in paragraph 4-3, “Verifying
Measurement Accuracy,”at least once annually.
Additionally,this chapter includes procedures that may be used to
measure the following key system performance parameters:
qEffective Source Match
qEffective Directivity
qSystem Dynamic Range
qFrequency Accuracy
qPower Level Accuracy
The Operational Testsdescribed in Chapter 3 should be performed
prior to verifying system performance.
Please ensure you have read and fully understand the servicing con-
cepts for the 373XXApresented in Chapter 1 prior to continuing with
this chapter.
4-2 CALIBRATIONAND
MEASUREMENT
CONDITIONS
Extremes in the surrounding environmental conditions and the condition
and stability of the test port connectors, through-cable, and calibration kit
determine system measurement integrity to a large extent.
These are all user controlled conditions, and as such, should be evalu-
ated periodically for impact on system performance. If these conditions
vary significantly with time, the system verification procedures should
be performed more often than the recommended annual cycle.
Standard Conditions The standard conditions specified below must be observed when perform-
ing any of the operations in this chapter — both during calibration and
during measurement.
Warm-upTime: One hour minimum.
Environmental Conditions:
Temperature: 23 +/- 3 deg C
Relative Humidity: 20-50% recommended.
373XXA MM 4-3