Tektronix CSA7404B - Page 188

Performance Tests
4-112
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
c. Save the probe compensation signal in reference memory:
H Touch Refs; then select the Ref 1 tab.
H Touch the Save Wfm to Ref1 Save button to save the probe
compensation signal in reference 1.
H Disconnect the cable from CH 1 and the probe compensation
connector.
H Touch the Display button to toggle it to on to displayed the stored
signal.
d. Hook up the DC standard source:
H Set the output of a DC calibration generator to off or 0 volts.
H Connect the output of a DC calibration generator through a
dual-banana connector followed by a 50 Ω precision coaxial cable to
one side of a BNC T connector. See Figure 4--33.
H Connect the Sense input of the generator through a second dual-ba-
nana connector followed by a 50 Ω precision coaxial cable to the
other side of the BNC T connector. Now connect the BNC T
connector to CH 1 through a TCA-BNC or BNC-to-SMA adapter.
See Figure 4--33.
Instrument under test
DC calibrator
50 Ω Coaxial cables
Dual banana to
BNC adapters
BNC T
connector
Figure 4- 33: Subsequent test hookup
e. Measure amplitude of the probe compensation signal:
H From the tool bar, touch Horiz and select the Acquisition tab.
H Touch Average and set the number of averages to 16 using the
keypad or the multipurpose knob.