THDP-TMDP_Instructions-077054003.pdf - 第59页

Probe Generator output Model Range V oltage (p-p) Frequency THDP0200 150 V 50 V 10 kHz TMDP0200 75 V 50 V 10 kHz 7. Enable the generator output. Set the oscilloscope vertical to display the signal. 8. Make the adjustment…

7. Using the narrow-bladed tool, adjust the DC CMRR pot in the probe to minimize the amplitude of the waveform displayed on the

oscilloscope. Use averaging or hi-res filters to make viewing the 40 Hz signal easier

WARNING: Use only an insulated tool to make the adjustment. Failure to do so presents a potential shock hazard.

8. Disable the generator output.

LF compensation

WARNING: Dangerous voltages will be present on the calibration generator output terminals and connection cables. Always verify

that the generator is in the standby mode before you make any connections to the generator

Note: The TMDP0200 probe only has one long-term +LF adjustment and one long-term –LF adjustment. The other two probe

models have two long-term +LF adjustments and two long-term –LF adjustments each.

1. Verify that the generator output is off.

2. Connect the probe inputs to the signal output connector on the back of the generator, using adapters if necessary. Connect the red

probe lead to the signal, and the black lead to ground.

3. Set the probe attenuation to the lower range for the probe that you are adjusting.

4. Set the oscilloscope horizontal to 4

μs/div, acq mode = average 16.

5. Set the generator fast-rise (rise time waveform) output frequency to 10 kHz.

6. Set the generator fast-rise output voltage to 50 V

p-p

Table 17: LF compensation test equipment settings

Probe Generator output

Model Range Voltage (p-p) Frequency

THDP0100 600 V 50 V 10 kHz

Table continued…

Adjustments

Probe Generator output

Model Range Voltage (p-p) Frequency

THDP0200 150 V 50 V 10 kHz

TMDP0200 75 V 50 V 10 kHz

7. Enable the generator output. Set the oscilloscope vertical to display the signal.

8. Make the adjustments in the following order: long-term +LF

, long-term +LF*, short-term +LF. (The long-term +LF* adjustment is not

used in the TMDP0200 probe.) Repeat this sequence as necessary to optimize the square-wave response.

WARNING: Use only an insulated tool to make the adjustment. Failure to do so presents a potential shock hazard.

9. Disable the generator output.

10. Reverse the probe input leads to the generator

11. Invert the signal and trigger slope on the oscilloscope to display the rising edge of the signal. Adjust the trigger level if necessary.

12. Enable the generator output and make the adjustments in the following order: long-term –LF, long-term –LF*, short-term –LF. (The

long-term –LF* adjustment is not used in the TMDP0200 probe.) Repeat this sequence as necessary to optimize the square-wave

response.

AC CMRR

WARNING: Dangerous voltages will be present on the calibration generator output terminals and connection cables. Always verify

that the generator is in the standby mode before you make any connections to the generator

1. V

erify that the generator output is off.

2. Connect both of the probe inputs to the red (+) banana connector on the front output of the generator. Use a BNC-banana adapter if

necessary.

3. Set the output of the generator to 297 V

p-p

(105 V

rms) @100 kHz.

Adjustments

High Voltage Differential Probes THDP0100/0200 and TMDP0200 User Manual 59

Table 18: AC CMRR test equipment settings

Probe Generator output

Model Range Voltage (p-p) Frequency

THDP0100 600 V 297 V 100 kHz

THDP0200 150 V 297 V 100 kHz

TMDP0200 75 V 297 V 100 kHz

4. Set the oscilloscope horizontal to 10

μs/div.

5. Set the probe bandwidth to full and the attenuation to the lower range of the probe.

6. Enable the generator output. Adjust the oscilloscope vertical to display the signal.

7. Make only

slight adjustments to only the +LF pots to optimize the CMRR (minimize the signal amplitude). Adjust the pots in the

following order: short-term +LF

, long-term +LF, long-term +LF*. (The long-term +LF* adjustment is not used in the TMDP0200 probe.)

WARNING: Use only an insulated tool to make the adjustment. Failure to do so presents a potential shock hazard.

This completes the adjustment procedures.

Adjustments