User manual

Operation Basics: Functional Overview
2–4
WFM 90 & WFM 91 User Manual
Instrument Reset
Extraordinary conditions may cause the WFM 90 and WFM 91
controls to become locked or to respond erratically. To reset the
instrument, first press the
ON button to turn off the power, then press
the
ON button again while holding down the WIP and LINE SEL
buttons. The instrument should return to normal operation with the
keypad controls and menu selections assigned to the factory-set
defaults.
If this reset does not return the instrument to normal operation,
contact your Tektronix field office or call Tektronix at the phone
number listed in the front of this manual.
Side-Panel Connectors and Switches
The WFM 90 and WFM 91 side panels are illustrated in Figure 2–2.
Video Input and Output Connectors
VIDEO IN. Passive BNC input, unterminated, and 75W compensated
for a video signal. A rear-panel switch provides an internal 75W
signal termination.
NOTE. A loop-through connector can be used by connecting a BNC
“T” connector to the Video In BNC. Slide the rear panel switch in
the HI-Z position.
EXT REF. Passive BNC input, unterminated, and 75W compensated
for an external sync video signal. A rear-panel switch provides an
internal 75W signal termination.
VIDEO OUT. A BNC connector used to output the instrument display
to a remote monitor or video switcher.