Anritsu 373XXA - Manual (Page 49)

Chapter 4
Performance Verification
4-1
INTRODUCTION This chapter provides specific procedures to be used to verify that the
373XXA is 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:
q Effective Source Match
q Effective Directivity
q System Dynamic Range
q Frequency Accuracy
q Power Level Accuracy
The Operational Tests described 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 373XXA presented in Chapter 1 prior to continuing with
this chapter.
4-2
CALIBRATION AND
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-up Time: One hour minimum.
Environmental Conditions:
Temperature: 23 +/- 3 deg C
Relative Humidity: 20-50% recommended.
373XXA MM 4-3