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Operating Instructions—7934 Operator's
FRONT-PANEL CONTROLS, CONNECTORS, AND INDICATORS
a) GRAT ILLUM — Controlsillumination of graticule lines.
@) PRESET (Readout) — Screwdriver adjustment to set PULSED Readout Modeintensity.
READOUT — Controls brightnessof the readout display. Disables Readout System in counterclockwise OFF detent. Activates
Pulsed Readout Mode in clockwise PULSED detent.
Camera Power Connector (not labeled) — Three-pin connector provides powerfor camera operation and receives
single-sweep-reset signal.
G) TRACE ROTATION — Screwdriver adjustmentto align trace(s) with graticule lines.
(8) ASTIG — Screwdriver adjustment used with the FOCUS control to obtain a well-defined display.
@) A INTENSITY(indicator) — flluminates when A HORIZ plug-in selected for display.
A INTENSITY — Controls brightness of trace produced by the plug-in installed in the A HORIZ compartment.
@) FOCUS — Optimizescrt trace definition.
B INTENSITY (indicator) — illuminates when B HORIZ plug-in selected for display.
qu) 8 INTENSITY — Controls brightness of trace produced by the plug-in installed in the B HORIZ compartment.
(2) BEAMFINDER — When pressed, compresses and defocuses display within graticule area.
REDUCED SCAN(switch andindicator) — Calibrated area of crt is reduced to inner half-size graticule and stored writing
speed is increased whenindicatoris on.
(4) Storage Mode Switch (not labeled) —- Selects one of four storage modes or the STORE OFFdisplay mode.
(8) STORAGE LEVEL — Varies writing speed of VAR PERSIST, FAST BISTABLE, and FAST VAR PERSISTstorage modes.
SAVE (control and indicator) —- Retains stored display in a noneraseable mode with continuously variable intensity when
indicatoris on.
MULT! TRACE DELAY — Controls time between successive sweeps when operating in FAST BISTABLE and FAST VAR
PERSIST storage modes.
AUTO ERASE — Controls viewtime in automatic erase mode.
ERASE — Erases stored display.
PERSISTENCE — Controls rate of continuous erasure of VAR PERSIST and FAST VAR PERSISTstorage display modes.
(i) SAVE INTENSITY -— Controls intensity of the SAVE display.
(2) Ground (not labeled) —- Binding post to establish common ground between associated equipment.
(23) B TRIGGER SOURCE — Selects internal trigger source for B HORIZ plug-in unit.
(24) VERT TRACE SEPARATION (B) — Vertically positions the B HORIZ trace with respect to the A HORIZ trace
(duai-sweep modes only).
@) HORIZONTAL MODE — Selects source of horizontal signa! and horizontal display mode.
A TRIGGER SOURCE — Selects internal trigger source for A HORIZ plug-in unit.
Horizontal Selector (located at rear of A HORIZ compartment} — Three position switch which over-rides the
HORIZONTAL MODEswitch to determine the source of the horizontal display signal.
VERTICAL MODE — Selects source of vertical input signal and vertical display mode.
POWER(switch and indicator) — Switch controls power to instrurnent; indicator illuminates when poweris applied.
CALIBRATOR — Providescalibrated square-wave voltages at 1 kHz repetition rate at CALIBRATORoutput connector.
Fig. 2-ib. Front-panel controls, connectors and indicators.
2-3
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