Operating Basics
Outputs
The 80C12B module provides buffered electrical signal outputs. For clock
recovery purposes, route this signal to the input of a Tektronix CR175A or
CR286A Electrical Clock Recovery instrument, or to an 80A05 Electrical Clock
Recovery module installed in the same mainframe.
CAUTION.
Electrostatic discharge (ESD) will cause permanent damage to
electrical outputs. Adhere to standard ESD handling precautions when using
the outputs. In particular, make sure to discharge all electrical signal cables
or connectors to ground before attaching them to the BUFFERED outputs.
To discharge a cable, touch the center pin of the coaxial cable to a grounded
conductor (such as the outside ground conductor of the BUFFERED output
connector) just before connecting the cable to the module.
NOTE.
Use 50
Ω
terminations, provided with your optical module, on all unused
electrical outputs.
Hold-Down Screws
Hold-down screws attach the module to the main instrument. Once the hold-down
screws are loosened, use the module slot eject levers to remove the module from
a powered-down main instrument. Indicators on the hold-down screws point in
the direction that the latch is pointing.
NOTE.
Do not pull on module connectors to remove a module; always use the
hold-down screws to pull the module out far enough for you to hold the module
and remove it from the instrument.
Commands from the Main Instrument Front Panel
The Vertical Setup dialog box (click
Setup > Vertical
from the instrument menu)
lets you toggle between the basic and optical module vertical setup controls.
(See Figure 4.)
Select the channel you want to set in the Waveform section of the dialog box.
Then select the Setup Wavelength, Filter, Bandwidth, or Compensate controls in
the dialog box to change those settings or to initiate a compensation. Optical
modules with the clock recovery option also have source and rate controls in
the Trigger dialog box.
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80C12B Optical Sampling Module User Manual