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Performance Tests

4-90

CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual

H Move the signal to CH 1, set the Trigger SOURCE to CH 1, and

move the 50 Ω termination to the CH 4 input.

H Press PUSH TO SET 50%.

H SettheVerticalSCALEofCH1,CH2,CH3,andCH4to50 mV

H 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 250 mV. Readout may fluctuate around

250 mV.

H Remove the 2X attenuator.

H Repeat substeps a through g.

H Connect the 2X attenuator to CH 1.

H Move the coaxial cable to CH 1, set the Trigger SOURCE to CH 1,

and move the 50 Ω termination to the CH 4 input.

H SettheVerticalSCALEofCH1,CH2,CH3,andCH4to10 mV

H 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 50 mV. Readout may fluctuate around

50 mV.

H Remove the 2X attenuator.

H Repeat substeps a through g.

6. Disconnect the hookup: Disconnect the cable, terminations, and adapters

from the generator output and the input connector of the channel.

Equipment

required

One Digital Multimeter (Item 27)

One Dual-Banana Connector, (Item 5)

One precision 50 Ω coaxial cable (Item 4)

One SMA male-to-female BNC adapter (Item 19)

Prerequisites See page 4--17

Check Input Impedance

Tektronix CSA7404B Service Manual

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