High Performance Oscilloscope Calibrator
9500B Mainframe Verification by Functions
47
Verification Procedure
1.
Verification Points:
Refer to Table 4.
2.
DMM:
Select the correct RMS Voltage range for the
verification point RMS Output Voltage.
3.
9500B:
Set the Output Volts p-p as required for the
verification point.
4.
4955:
If using the Model 4955 Calibration Adaptor, set its
switch to 'SQV 50
Ω
'. If not using the Model 4955,
ensure that the DMM input is AC-coupled at 50
Ω
input impedance.
5.
9500B:
Set Output ON and wait for the DMM reading to
settle.
Note
For Operation (6), the RMS Output Voltage values, and RMS Absolute
Limits have been derived using the following factor for the output
waveform: (at 1 kHz: RMS = 0.5 x 0.707106781 x pk-pk).
Note
This factor applies only when the Standards DMM input is AC-Coupled
through a large capacitance. It is based on the use of a model 4955 set to
'SQV 50
Ω
'.
6.
Amplitude: a.
Measure the RMS Output Voltage value.
b.
Record this value in the Measured Value column of
the copy of the Table.
c.
Check that the Measured Value is at or between the
Absolute Limits.
7.
9500B:
Set Output OFF.
Note
Please copy the following table. Enter the measurements in the Measured
Value column on the copy:
Table 7. Sine Verification into 50
Ω
Load
Verif.
Point
3
Frequency
Output
Voltage
(pk-pk)
Absolute Limits
(pk-pk)
Output
Voltage
(RMS)
Absolute Limits
(RMS)
Measured
Value
(RMS)
Lower Higher
Lower Higher
SIN1
1 kHz
4.8000 V
4.632 V
4.968 V
1.69706 V
1.6377 V
1.7565 V
SIN2
45 kHz
4.8000 V
4.632 V
4.968 V
1.69706 V
1.6377 V
1.7565 V
SIN3
1 kHz
1.9000 V
1.8335 V
1.9665 V
0.67175 V
0.6482 V
0.6953V
SIN4
45 kHz
1.9000 V
1.8335 V
1.9665 V
0.67175 V
0.6482 V
0.6953V
