Keysight Technologies N6705C, Руководство по эксплуатации и обслуживанию

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Step 9. Steps 9 and 10 for models N6781A, N6782A, N6784A only. Connect the Keysight 3458A
directly across the output (see Test Setup D without the resistor). Set the Keysight 3458A to the 100
mA range (no autoranging). Set the current programming to the low ranges - 300 mA for N6781A and
N6782A; 100 mA for the N6784A. Set the instrument as described under “Current Programming 300
mA & 100 mA ranges”. Record the current readings of the 3458A. The readings should be within the
limits specified under “300 mA and 100 mA range Current Iout”.
Step 10. Set the current programming to the 10 mA range for the N6784A. Set the instrument as
described under “Current Programming 10 mA range”. Record the current reading of the 3458A. The
reading should be within the limits specified under “10 mA range Current Iout”.
Step 11. Steps 11 and 12 for models N6781A, N6782A, N6784A, N6785A, and N6786A only. Connect
the Keysight 3458A in series with a 10 Ω resistor to the output (see Test Setup D ). Set the Keysight
3458A to measure current using the 100 mA range. Set the current measurement to the 100 mA
range. Set the instrument as described under “Current Readback 100 mA Range”. Record the current
reading of the 3458A and the current measured over the interface. The readings should be within the
limits specified under “100 mA Range Readback”.
Step 12. Connect the Keysight 3458A in series with a 10 k Ω resistor to the output (see Test Setup D ).
Set the Keysight 3458A to measure current using the 10 mA range. Set the current measurement to
the 1 mA range. Set the instrument as described under “Current Readback 1 mA Range”. Record the
current reading of the 3458A and the current measured over the interface. The readings should be
within the limits specified under “1 mA Range Readback”.
Step 13. For models N6781A, N6782A, and N6784A only. Connect the Keysight 3458A in series with a
1 M Ω resistor to the output (see Test Setup D ). Set the Keysight 3458A to measure current using the
100 μA range. The remote command is “DCI 100e-6”. Set the current measurement to the 10 μA
range. Set the instrument as described under “Current Readback, 10 μA Range”. Record the current
reading of the 3458A and the current measured over the interface. The readings should be within the
limits specified under “10 μA Range Readback”.
Constant Current Load Effect
Test category = performance
This test measures the change in output current resulting from a change in output voltage from full
scale to short circuit.
Step 1. Turn off the power analyzer and connect the current shunt, DMM, and electronic load (see
Test Setup B ). Connect the DMM directly across the current shunt.
Step 2. Turn on the power analyzer and program the instrument settings as described in the test
record under “CC Load Effect”.
Step 3. Set the electronic load for CV mode and program it to the output channel’s voltage as
described in the test record under “CC Load Effect”. The output status should be “CC”. If it isn’t, adjust
the load so that the output voltage drops slightly.
Step 4. Divide the voltage drop (DMM reading) across the current shunt by the shunt resistance to
convert to amps and record this value (Iout).
Keysight N6705C Operating and Service Guide 383
8 Verification and Calibration