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5700A/5720A Series II Calibrator
Service Manual
3-40
Table 3-12. Wideband Adjustment Tolerance
5700A/5720A Series II Wideband
Output
5790A Adjustment Counts
± ppm
2.10000V 20
1.00000V 10
300.000 mV 3
100.000 mV 10
30.0000 mV 3
10.0000 mV 1
3.00000 mV 1
1000.00 µV1
3-29. Wideband Output Flatness Test
Use Table 3-32 as a test record. To perform wideband output flatness test, proceed as
follows:
1. Connect the equipment as shown in Figure 3-17. Note that the Calibrator wideband
cable is connected to the 5790A directly, the termination is not used.
5790A
Wideband
Input
Calibrator (UUT)
Wideband
Output
Wideband
Output Cable
F3-13.EPS
Figure 3-17. Wideband Flatness Test Setup
2. Set the wideband output to 3V at 1 kHz.
3. Push the WBND button on the 5790A, when the reading has settled, push the SET
REF soft key.
4. Set the Calibrator to frequencies shown in Table 3-32 for the 3V output and record
the errors on the 5790A error display at each frequency in Table 3-32.
5. Verify that the error readings are within spec limits or reduced spec limits shown on
the test record. Reduced spec limits are used when the TUR (Test Uncertainty Ratio)
is less than 4:1.
6. Repeat steps 4 and 5 for the remaining output levels shown in Table 3-32 using the
appropriate voltage in step 4.
7. Record the 1 kHz absolute errors at each output level from Table 3-32 into the
appropriate column in Table 3-33. Record the flatness errors from Table 3-32 for
each output level and frequency into the appropriate column in Table 3-33. Add the
errors and verify that they are within spec for the appropriate time internal.