Agilent Technologies 6031A Manuale Utente
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Use the front panel controls to vary the output voltage and current from zero to full-scale output. Remember to turn off the
unit and connect a short across the output before programming the current from zero to full scale. Use a DMM and check
the voltages at the following nodes:
unit and connect a short across the output before programming the current from zero to full scale. Use a DMM and check
the voltages at the following nodes:
CV DAC Circuits
Node
Setup
Measurement
U69-6
Voltage set to 0.
0V
Voltage set to max.
+ 5V
U64-6
Voltage set to 0.
0V
Voltage set to max.
-10V
CC DAC Circuits
Node
Setup
Measurement
U68-6
Current set to 0.
0V
Current set to max.
+ 5V
U65-6
Current set to 0.
0V
Current set to max.
-10V
Readback DAC Circuits
Refer to Figure 3-4 for the waveforms to troubleshoot the readback circuits.
The turn-on selftest waveform at U24-7 is obtained by toggling the on/off switch repeatedly to perform the selftest routine.
If this waveform is not correct, isolate the problem either to the readback DAC or the multiplexer.
If this waveform is not correct, isolate the problem either to the readback DAC or the multiplexer.
Note:
To troubleshoot the readback DAC from the front panel if the unit has failed selftest, place jumper A8J5 in the
skip selftest position (see Table 3-2). This lets you operate the unit even though it fails the internal selftest.
skip selftest position (see Table 3-2). This lets you operate the unit even though it fails the internal selftest.
Use the front panel controls to vary the output voltage from zero to full-scale output to obtain the waveforms at U67-6.
These waveforms check the operation of the readback DAC.
These waveforms check the operation of the readback DAC.
To check the multiplexer, use the front panel controls to obtain the waveforms at the output of the multiplexer (U24-2).
Remember to turn off the unit and connect a short across the output before programming the current from zero to full scale.
Press "OVP DISPLAY'' on the front panel to display the OV_MON portion of the waveforms.
Remember to turn off the unit and connect a short across the output before programming the current from zero to full scale.
Press "OVP DISPLAY'' on the front panel to display the OV_MON portion of the waveforms.
If the waveforms are not correct, use the front panel controls and a DMM to check the multiplexer input voltages at the
following nodes:
following nodes:
Readback Multiplexer (U20):
Node
Setup
Measurement
U20-9
Voltage set to 0.
0V
Voltage set to max.
+ 5V
U20-10
Current set to 0.
0V
Current set to max.
+ 5V
U20-11
OV set to 0.
0V
OV set to max.
+2.2V