HP E1328A, Руководство по обслуживанию, Страница: 23 / 70

Test Procedure
(Negative Voltage
Compliance)
1. Set three jumpers on each channel to the V position
2. Connect DC Source and HP 3458A to Channel 1 (see Figure 4-1 )
3. Set non-cal mode on Channel 1 with CAL1:STAT OFF
4. Set Channel 1 to min voltage output (-12V) with VOLT1 MIN
5. Set DC source to -5V and measure channel output (in V)
6. Increase DC source output by -0.5V and measure new channel output
(in V)
7. Repeat step 6 until channel output stops increasing. If the output
voltage is
≤
-15.0V when the output stops increasing, the test passes.
8. Repeat steps 2 through 7 for Channels 2, 3, and 4 (use CALchan:
STAT OFF and VOLTchan MIN)
9. Remove power and disconnect test equipment
Example: Positive
Voltage Compliance
This program checks the MEASURED voltage output from the DAC
channel being tested. If the measured channel output is
≥
15.0V when the
output stops increasing, the program generates a "test PASSED" indication.
If the measured channel output is < 15.0V when the output stops increasing,
the program generates a "test FAILED" indication.
NOTE
To use this program for negative voltage compliance tests, change the
indicated lines as shown:
50 OUTPUT 70909;"VOLT"&VAL$(Chan)&" MIN"
60 Source = -4.5
90 Source = Source-.5
180 IF Value <= -15 THEN Pass$ = "PASSED"
190 IF Value > -15 THEN Pass$ = "FAILED"
Chapter 4 Verification Tests 23