Performance Verification
AMT75 Impedance Adapter Instructions
9
Output Impedance
1. Set up the DMM as follows:
DMM
Setting
Mode
4 Wire
Range
100
2. Connect the AMT75 adapter as shown in Figure 4.
NOTE
. Connect the input and sense of the DMM to the output of the AMT75
adapter with a 50
W
BNC T adapter, two 50
W
BNC cables, and two BNC
banana adapters.
50.000
Multimeter
75
terminator
50
BNC cables,
50
T adapter,
and 50
BNC adapter
Figure 4: Test setup for output impedance
3. Check that the DMM reads 50
W
$
1.5% (49.25 to 50.75).
4. Disconnect 50
W
BNC T adapter, AMT75 adapter, and 75
W
terminator from
the setup.