User manual

Service Information
Check Low Frequency
Response
Refer to the set
up diagram when making equipment connections. (See Figure 5
on page 15.)
1. Connect the calibration fi xture to the Leveled Sinewave Output of the
calibration generator.
2. Connect the BNC-to-dual banana adapter to the input of the DMM.
3. Connect the P6022 termination and probe to the BNC-to-dual banana adapter
that is connected to the DMM.
4. Set the P6022 termination sensitivity to 1 mA/mV.
5. Set the DMM to ACV (autorange).
6. Set the Leveled Sinewave Output of the calibration g enerator to 50 kHz and
an amplitude of 5 V
pp
.
7. Connect the probe to the calibration fixture.
8. Enable the Leveled Sinewave Output of the calibration generator.
9. Measure and record the DMM output as M1 in the table below. (See T
able 7
on page 18.)
10. Set the Leveled Sinewave Output of the calibration generator to 8.5 kHz.
11. Measure and record the DMM output as M2 in the table below. (See Table 7.)
12. Calculate the low frequency bandwidth ratio:
13. Record the results in the test record and compare the results against the low
frequency specification. (See Table 1 on page 9.)
14. Set the P6022 termination sensitivity to 10 mA/mV.
15. Set the Leveled Sinewave Output of the calibration generator to 50 kHz and
an amplitude of 5 V
pp
.
16. Measure and record the DMM output as M3 in the table below. (See Table 7.)
17. Set the Leveled Sinewave Output of the calibration generator to 935 Hz.
18. Measure and record the DMM output as M4 in the table below. (See Table 7.)
19. Calculate the low frequency bandwidth ratio:
20. Record the results in the test record and compare the results against the low
frequency specification.
NOTE. Dirty or worn mating surfaces between the transformer and the lid degrade
the low-frequency response. Clean them if necessary. (See page 24, Maintenance.)
P6022 Instruction Manual 17