Zero Set Performance Test In System Level - Keysight n1921a Operating And Service Manual

Zero Set Performance Test in System Level

Zero set is defined as the amount of residual offset error that is present following a
zeroing operation. This offset error is caused by contamination from several
sources, including circuit noise. This test is a system-level verification which
requires N1911/2A.
Test equipment
– Signal generator (E4438C)
– Power meter (N1911/2A)
– Keysight USB/GPIB interface (82357B)
– GPIB cable
– Wideband power sensor (N1921/2A)
– PC
System specification
– No RF presence: <200 nW
– RF presence: <200 nW (frequency > 500 MHz), <550 nW (frequency <500 MHz)
Test procedure
1 Connect the N1921/2A to the N1911/2A.
2 Turn on N1911/2A and E4438C.
3 Set the GPIB address of the power meter (N1911/2A) and the signal generator
4 Connect the N1921/2A to the signal generator as shown in
Keysight N1921A and N1922A Operating and Service Guide
(E4438C) to 13 and 19 respectively.
the system to warm up for approximately an hour.
Performance Tests and Adjustments 2
Figure 2-7. Allow
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