TCP303 and TCP404XL Performance Verification
Table 22: Bandw
idth test for the TCP303
TEKPROBE Interface Cable BNC cable
Probe Range
Oscilloscope
vertical gai
n
TCPA300
output
Oscilloscope
vertical gai
n
TCPA300
output
M1
@3 MHz
ref freq
M2 @
warranted B W
freq (15 MHz) Calculation
1
TCP303 5 A/V 10 mA/div
~60 mA p-p
2 mV/div
~12 mV p-p
1
Usetheformulainstep9below.
9. The probe meets the bandwidth specification if the ratio of the signal
amplitude at the warranted bandwidth is at least 70.7% of the signal amplitude
at 3 MHz. Using the following calculation, verify probe bandwidth:
10. Record the resul
ts on the test record.
Bandwidth (TCP404XL)
The b andwidth
of the probe is derived as a function of the probe rise time. The
rise time (t
r
) is measured in nanoseconds between the 10% and 90% points of
the leading edge of the pulse. (See page 24, Rise Time.) To calculate the probe
bandwidth, use the following formula:
For example, a rise time of 175 ns would result in the following solution:
1. Record the results on the test record.
This completes the pe
rformance verification for the TCP303 and TCP404XL
probes.
If the TCP303 or TCP40
4XL probes fail any of the verification tests, servicing
information is available. (See page 45, Adjustme nt Procedures Overview.)
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Service Manual 41
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