Auxiliary Voltage Measurement Accuracy (N6781A And N6785A Only) - Keysight N6705C Operating And Service Manual

8 Verification and Calibration
d. Connect a 22 AWG twisted-pair from the +/- sense terminal to the output terminals of the N6784A
load.
Step 2. Turn on the power analyzer and program the instrument settings as described in the test
record form under "Transient Response 6V".
Step 3. Set the N6784A that is being used as the load as follows:
a. Emulation Mode = CC Load (in current priority mode)
b. + Voltage limit = 6.12 V
c. Current Slew setting:
N678xA: Maximum (the default)
N6783A: 67500 A/s (for a pulse rise/fall time of 20 μs)
d. Arb = Current Pulse
e. Load pulse properties:
N678xA: I0= −0.1 A; I1= −1.5A; T0= 1ms; T1= 1ms; T2= 1ms
N6783A: I0= −0.15A; I1= −1.5A; T0= 0.5ms; T1= 0.5ms; T2= 0.5ms
f. Continuous = ON g. Press Arb run..
Step 4. Adjust the oscilloscope for a waveform similar to that shown in the previous figure.
Step 5. The output voltage should return to within the specified voltage at the specified time following
the 50% load change. Check both loading and unloading transient by triggering on the positive and
negative slope. Record the voltage at time "t" in the performance test record form under "Transient
Response".
Step 6. For models N6781A, N6782A, and N6784A only. Repeat steps 3 through 5 for the 20 V range.
Program the instrument settings as described on the test record form under "Transient Response 20
V". Change the settings of the N6784A that is being used as the load as follows:
b. + Voltage limit = 20.4 V
e. Load pulse properties:
N678xA: I0= −0.1 A; I1= −0.9A; T0= 1ms; T1= 1ms; T2= 1ms

Auxiliary Voltage Measurement Accuracy (N6781A and N6785A only)

Test category = performance
Step 1. Turn off the power analyzer and connect the external DMM and an external power supply to
the auxiliary voltage inputs (see Test Setup E).
Step 2. Turn on the external power supply and set the output to 20 volts. Turn on the power analyzer.
In the front panel menu, select Measure\Input and then select Auxiliary.
Step 3. Record the external DMM reading and the auxiliary DVM readings. The auxiliary voltage
reading should be within the designated voltage limit indicated in the test record form under "Auxiliary
Voltage Readback".
Step 4. Reverse the leads of the external power supply and repeat step 3.
Keysight N6705C Operating and Service Guide 381