1 Calibration Procedures
60 Keysight U3606B Service Guide
3 Configure the AC/DC converter as follows:
a Set the range to 5 A/V.
b Set the coupling to AC.
4 Connect another 50 Ω feed-thru termination to the differential amplifier output
and an RMS voltmeter to the 50 Ω feed-thru termination.
5 Turn on the instrument. Press [Current] to select the constant current mode.
Ensure that the appropriate range is selected.
6 Set the output current to the full rated value (1 A for S1 range, 3 A for S2
range, or 0.1 A for S1m range) and voltage to full scale. Enable the output.
7 Configure the differential amplifier as follows:
a Set to the AC mode (positive and negative) to remove the DC component.
b Set to the differential mode.
c Set the gain to ×10.
d Set the attenuation to 1.
e Set the low-pass filter to 20 MHz bandwidth limit to filter out input signals
containing higher frequencies.
f Set to the zero precision current generator.
g Set the input impedance to 1 MΩ.
8 Configure the RMS voltmeter as follows:
a Set the high-pass filter to 10 Hz.
b Enable AC coupling.
9 Obtain the maximum RMS current measurement as indicated in the RMS
voltmeter. Divide the value by 10 and then multiply by 5 to get the constant
current RMS noise measurement.
10 Repeat the step 5 to step 9 for the S2 (8 V/3 A) and S1m (100 mA/30 V)
ranges. All the results should not exceed 0.001 A
rms
as shown in Table 1-21.
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