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Performance Tests

CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual

4-81

H When finished checking, set the horizontal SCALE back to the

40 ns setting.

STOP. Checking each channel’s bandwidth at all vertical scale settings is time

consuming and unnecessary. You may skip checking the remaining vertical scale

settings in Table 4--7 (that is, skip the following substep, h) if this instrument has

performed as follows:

H Passed the 100 mV vertical scale setting just checked in this

procedure.

H Passed the Verify Internal Adjustment, Self Compensation, and

Diagnostics procedure found under Self Tests, on page 4--5.

NOTE. Passing the signal path compensation confirms the signal path for all

vertical scale settings for all channels. Passing the internal diagnostics ensures

that the factory-set adjustment constants that control the bandwidth for each

vertical scale setting have not changed.

h. Check remaining vertical scale settings against limits (optional):

H If desired, finish checking the remaining vertical scale settings for

the channel under test by repeating substeps c through g for each of

the remaining scale settings listed in Table 4--7 for the channel under

test.

H When doing substep e, skip the subparts that turn on the CHx Pk-Pk

mean measurement until you check a new channel.

H Before doing substep f, touch the Clear button to remove the

previous channel measurements.

H Install/remove attenuators between the generator leveled output and

the channel input as needed to obtain the six division reference

signals listed in the table.

i. Test all channels: Repeat substeps a through g for all four channels.

3. Disconnect the hookup: Disconnect the test hook up from the input

connector of the channel last tested.

Tektronix CSA7404B Service Manual

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