Performance Tests
4- 106
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
TDS7704B, CSA7404B, TDS7404B,
TDS7254B & TDS7154B 1.5 GHz
H Disconnect the 5X attenuator. Set the test signal amplitude for about
five divisions on screen. Now fine adjust the generator output until
the CH 1 Amplitude readout indicates the amplitude is 500 mV.
(Readout may fluctuate around 500 mV).
H Disconnect the cable at CH 1 and reconnect it to CH 1 through a 5X
attenuator. Check that a stable trigger is obtained.
e. Repeat step 2, substep c only, for the bandwidth selected.
f. Display the test signal (Aux trigger at 2 GHz):
H Set the generator frequency to 2 GHz.
H Set the Horizontal SCALE to 200 ps.
H Remove the 5X attenuator and reconnect the cable to CH 1.
H Set the generator amplitude on screen as follows:
CSA7404B 4 divisions
TDS7704B, CSA7404B, TDS7404B,
TDS7254B & TDS7154B 5 divisions
H Now fine adjust the generator output until the CH 1 Amplitude
readout indicates the amplitude is as follows (Readout may
fluctuate):
CSA7404B 350 mV
TDS7704B, CSA7404B, TDS7404B,
TDS7254B & TDS7154B 500 mV
g. Repeat step 3, substeps b only, for the full bandwidth selected.
NOTE. You just checked the trigger sensitivity. If desired, you may repeat steps 1
through 4c for the other channels (CH 2, CH 3, and CH 4).
5. Disconnect the hookup: Disconnect the cables and adapter from AUX IN and
the channel last tested.
Output Signal Checks
The procedure that follows checks those characteristics of the output signals that
are listed as checked under Warranted Characteristics in Specifications.
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