Tektronix TCPA300 SERIES, Instruction Manual

Page: 145 / 205

TCP305 and TCP312 Adjustments
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
6- 9
Current
source
DMM
+ --
+ --
5 Turns
Current
probe
BNC-to-dual
banana adapter
50
Ω
Precision
termination
Output
50
Ω
Coaxial cable
Current flow
Figure 6- 4: DC gain adjustment setup for TCP305 and TCP312
1. Press the amplifier PROBE DEGAUSS AUTOBALANCE button. Wait for
the degauss/autobalance routine to complete before proceeding. The routine
is complete when the indicator light turns green.
2.
Connect the current probe to the DC current loop.
3. Refer to Table 6--7 and perform the following steps:
a. Set the amplifier to the appropriate range setting for the probe you are
testing.
b. Set the current source output to the correct current level.
c. Enable the output of the current source.
d.
Adjust the DC gain control on the probe to the expected output value
shown in Table 6--7.
Table 6- 7: DC gain accuracy adjustments for the TCP305 and TCP312
Probe Range
Current source
output (mA pk) Expected out-
put, V
E
(VAC)
Minimum out-
put, VAC Maximum out-
put, VAC
TCP305
5 A/V
300 mA 0.3000 0.2990 0.3011
TCP312
1A/V 60 mA 0.3008 0.2997 0.3018
This completes the adjustments for the TCP305 and TCP312 Current Probes. Do
the appropriate performance verification procedure for the probe you adjusted,
using the procedures beginning on page 5--19.
Procedure