Tektronix TCPA300 SERIES, Instruction Manual

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TCP303 and TCP404XL Performance Verification
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
5- 33
DC Gain Accuracy
This procedure tests the DC gain accuracy of the TCP303 and TCP404XL. In
this test you compare the voltage output of the amplifier to a reference input.
This test uses a 50-turn current loop that you make using wire and a 3-inch form.
Refer to page 5--4 for instructions on making the current loop.
1. Using a BNC cable, connect the amplifier OUTPUT to the 50
Ω
feed-
through termination. Attach the termination to a BNC-to-dual banana
adapter. Insert the dual-banana adapter into the digital multimeter DC
voltage input, taking care to maintain polarity.
2. Connect the current loop to the current source as shown in Figure 5--10.
3. Connect the current probe to the PROBE INPUT connector. Do not connect
the probe to the current loop at this time.
Current
source
DMM
+ --
+ --
50 Turns
Current probe
BNC-to-dual
banana adapter
50
Ω
Precision
termination
Output
50
Ω
Coaxial
cable
Current flow
Figure 5- 10: DC gain accuracy test setup for the TCP303 and TCP404XL
Make or check the equipment settings in Table 5--18.
Table 5- 18: Equipment settings for DC gain accuracy
Digital multimeter
Measurement DC volts
Range Autoranging
Current source
Output Off
TCPA300 and TCPA400
Coupling DC
Equipment Connections
Equipment Settings