Technical data

2Performance Tests
28 N1911A/1912A P-Series Power Meters Service Guide
Time Base Frequency Accuracy
Description
The accuracy of the 100 MHz sample clock determines the accuracy of all
measurements that are based on samples taken over time. This test mea-
sures the time base by dividing the sample clock by 10 (within the meter)
and feeding it out of the trigger output connector, where it can be directly
measured by a frequency counter.
Equipment
• Required test equipment:
1 unit of 53132A frequency counter
10 MHz frequency standard
1 unit of 10503A BNC cable
• An alternative frequency counter can be used, as long as it has the
appropriate bandwidth (> 10 MHz)
Figure 2-5 Time Base Test Setup Connection Diagram
Ch A
FREQUENCY COUNTER
P-SERIES
POWER METER
Channel 1
Ref In
10 MHz
Standard
Trigger
Output
BNC Cable
NOTE
For rear panel options, the connections will differ from the illustration shown here. Refer to
the connector identification markings on the rear panel for further details