Tektronix TCP300A, User Manual

Page: 62 / 82

Troubleshooting and Error Codes
Table 6: Troubleshooting (cont.)
Problem Remedy
Measurement aberrations exceed the
speci
fi ed limit
The ampli fi er output is not terminated into 50 Ω load. Set the input impedance of the
oscilloscope to 50 Ω or connect a 50 Ω feedthrough termination at the oscilloscope input.
Do not attach the termination to ampli fi er output.
The measurement exceeds the maximum continuous current or Ampere-second product
ratings of the Current Probe. (Current limits are available) (See page 27,
Maximum
Current Limits .)
Excessive low frequency droop in pulse
response or low DC gain accuracy Check that the probe slider is fully closed and locked.
Check and clean the probe transformer and lid.
Degauss the probe.
The ampli
fi er or the oscilloscope may be AC coupled. Set the COUPLING to DC.
Measurements exhibit excessive delay
or slowed pulse response The ampli fi er output is not terminated into 50 Ω load. Set the input impedance of the
oscilloscope to 50 Ω or connect a 50 Ω feedthrough termination at the oscilloscope input.
Do not attach the termination to the ampli fi er output.
The measurement exceeds the Ampere-second product of the Current Probe.
The oscilloscope bandwidth limit is turned on. Verify that the bandwidth limit switch on
the oscilloscope is set to the desired bandwidth position.
44 TCPA300/400 Ampli fi ers and TCP300A/400 Series Current Probes User Manual