Tektronix WFM 601i, User Manual

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Functional Overview
2–22
Rev May 1994
WFM 601i Serial Component Monitor
Remote Operation
The 25-pin rear-panel REMOTE connector is a subminiature D-type connector.
For remote controlled functions like preset/recall a TTL low or ground closure is
the enabling level.
The user can store and recall up to eight front-panel setups through the remote.
Remote connector pin assignments are described in Appendix B.
The WFM 601i has 10 presets capable of storing front-panel setups. Presets one
through eight are accessible through the rear-panel REMOTE connector. A TTL
low or ground closure on one of the PRESET pins selects the front-panel setup
stored at that preset location.
When STORE (pin 25) is grounded along with one of the preset pins, the current
front-panel setup is stored at the selected preset location.
Pin 15 outputs an active-low TTL pulse during selected lines when in Line
Select modes. This signal can be used as a logic analyzer trigger.
Pin 16 outputs an active-low TTL level whenever the front–panel ALARM light
is illuminated.
Calibration
Instrument gain may require readjustment for special monitoring applications. To
reset the horizontal or vertical gain, follow these instructions.
Resetting Vertical Gain
1. To reset the vertical gain, select the Waveform display mode and push the
CONFIG menu button. Select CALIBRATE, then CAL SIG ON and GAIN
CAL ON
.
a. Use the VERT POS control to place the calibrator signal between the 0
and approximately 0.7 graticule lines (may will be exactly 700 mV).
b. If the RESET V CAL readout is on, push the adjacent bezel button.
c. Pushing RESET V CAL reinstates the gain setting established at the last
calibration.
d. Check to see that calibrator signal is now displayed as exactly 700 mV.
Resetting Horizontal Gain
Using Presets through the
Remote
LINE SELECT STROBE
SERIAL VIDEO ALARM