THDP-TMDP_Instructions-077054003.pdf - 第61页

Maintenance Information to isolate possible failures and procedures for maintaining your probe. Host instrument firmware Some instruments may require a firmware upgrade to support full functionality of the latest probes …

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

Maintenance

Information to isolate possible failures and procedures for maintaining your probe.

Host instrument firmware

Some instruments may require a firmware upgrade to support full functionality of the latest probes that are offered by Tektronix.

Instruments with lower versions of firmware may not display all probe controls and indicators on screen, and in some cases may require

you to power-cycle the instrument to restore normal instrument operation. If you are having problems with your probe and suspect that you

need to upgrade your instrument firmware, go to www.tektronix.com/probe-support to download the latest firmware.

To check the firmware version on Windows-based instruments, from the menu bar, click Help/About TekScope. On Linux-based

instruments, press the Utilities button on the front panel.

Error conditions

LEDs do not remain lit

If none of the LEDs remain lit after you connect the probe, a probe/oscilloscope interface fault may exist. Perform the following steps until

you clear the fault or isolate the problem:

• Disconnect and reconnect the probe to restart the power-on diagnostic sequence.

• Connect the probe to a different channel on the oscilloscope.

• Disconnect the probe from the oscilloscope, power-cycle the oscilloscope, and then reconnect the probe.

• Connect the probe to a different oscilloscope.

If the symptoms remain (they follow the probe), then the probe is defective and must be returned to Tektronix for repair.

Signal display

If the probe is connected to an active signal source and you do not see the signal displayed on the oscilloscope:

• Check that the probe accessories that you are using are fully mated.

• Check the probe connection on your circuit.

• Perform a functional check on the probe.

Cleaning

Protect the probe from adverse weather conditions. The probe is not waterproof.

CAUTION: T

o prevent damage to the probe, do not expose it to sprays, liquids, or solvents. Avoid getting moisture inside the

probe when cleaning the exterior.

Clean the exterior surfaces of the probe with a dry, lint-free cloth or a soft-bristle brush. If dirt remains, use a soft cloth or swab dampened

with a 75% isopropyl alcohol solution. Use only enough solution to dampen the cloth or swab. Do not use abrasive compounds on any part

of the probe.

Maintenance

High Voltage Differential Probes THDP0100/0200 and TMDP0200 User Manual 61

Service

There are no user-serviceable parts in the probes. If your probe requires service, contact your T

ektronix service representative or repair

center for instructions on returning your probe for repair.

Maintenance