Tektronix TDS 820, Manual

Page: 44 / 94

Performance Tests
Performance Verification
1Ć30
1. Install the test hookup and preset the instrument controls:
a.
Install the test hookup and initialize the front panel controls:
H
Set the DMM to measure ohms.
H
Connect the output of the DMM through a dual-banana connector
followed by a 50
W
precision coaxial cable to one side of a BNC T
connector. See Figure 1-10.
H
Connect the Sense output of the DMM, through a second dual-
banana connector followed by a 50
W
precision coaxial cable, to
other side of the BNC T connector. Now connect the BNC T
connector, through a BNC to SMA adapter, to CH 1.
H
Repeatedly press WAVEFORM OFF to remove all waveforms
from the screen.
b.
Hook up the test-signal source:
H
Connect the BNC to SMA adapter to the CH 1 input. Connect the
BNC to dual binding post adapter to the input of the DMM. Con-
nect the BNC to dual binding post adapter to the BNC to SMA
adapter through a BNC cable.
H
Set the DMM to measure ohms.
2.
Check against limits:
H
If your oscilloscope has delay lines (standard instrument), CHECK
that the DMM readout is 49 to 51
W
.
H
If your oscilloscope does not have delay lines (Option 1D), CHECK
that the DMM readout is 49.5 to 50.5
W
.
3. Test all channels: Move the test hook up to the next unchecked channel,
and repeat step 2.
4. Disconnect the hookup: Disconnect both the cable from the DMM and the
two adapters.