Tektronix CSA7404B Service Manual

Performance Tests
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
4- 125
Optical -to -Electrical Converter Checks (CSA7000B Series Only)
The procedure that follows checks those characteristics of the Optical-to-electri-
cal converter that are listed as checked under Warranted Characteristics in
Specifications.
Equipment
required
Fiber-optic dust cap (Item 38)
O/E electrical out-to-CH1 input adapter (Item 32)
Prerequisites See page 4--17. Also, the instrument must have passed Check DC
Voltage Measurement Accuracy on page 4--45.
1. Install the test hookup and preset the instrument controls:
a. Hook up test-signal source 1 (See Figure 4--41 on page 4--125):
H Install the O/E Electrical Out-to-CH 1 Input adapter on the
CSA Instrument.
H Install the fibre-optic dust cap onto the OPTICAL INPUT connector
of the O/E converter.
O/E Electrical
Out-to-CH1
input adapter
Dust cap
CSA7000B Instrument
Figure 4- 41: Initial test hookup
2. Follow this procedure to make the Dark Level checks:
a. In the Utilities menu, select Instrument Calibration. Check that the
Status is Pass.
b. Press the Calibrate button.
c. Wait until the compensation is completed.
Check Dark Level
Calibration

Tektronix CSA7404B Specifications

General

Brand	Tektronix
Model	CSA7404B
Category	Measuring Instruments
Language	English