Tektronix 7844, Инструкция по эксплуатации

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Operating Instructions-7844/R7844 Operators
FRONT-PANEL CONTROLS, CONNECTORS, AND INDICATORS
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POWER (ON) Switch-Applies power to instrument.
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POWER Indicator-lights when power is on.
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BEAM 2 INTENSITY Control-Controls brightness of beam 2 display.
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BEAM 2 FOCUS Control-Provides optimum definition of beam 2 display.
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BEAM 1 INTENSITY Control-Controls brightness of beam 1 display.
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BEAM 1 FOCUS Control-Provides optimum definition of beam 1 display.
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CALIBRATOR Connector-Provides 1 kHz calibrated square·wave voltages.
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TRACE ROTATION Adjustment-Aligns beam 1 and beam 2 traces with the graticule lines.
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GRAT I LLUM Control-Varies level of graticule illumination or activates PULSED GRAT ILLUM functions.
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GRAT.llLUM PRESET Adjustment {PULSED operation only}-Sets level of illumination for GRAT ILLUM PULSED
operation.
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GRAT ILLUM EXT/BEAM 2 GATED Control (PULSED operation onlyJ-When in EXT (push button IN) a signal to the
rear-panel GRAT/READOUT SINGLE SHOT connector provides momentary graticule illumination. When in BEAM 2
GATED (push button OUT) momentary graticule illumination is provided at the end of beam 2 sweep.
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GRAT I LLUM MANUAL Control (PULSED operation only)-Provides momentary graticule illumination when push
button is pressed.
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READOUT MANUAL Controll (PULSED operation only)-One readout frame is displayed when push button is pressed.
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4READOUT EXT/BE,AM 2 GATED1 (PULSED operation only) Control-When in EXT (push button IN) a signal to the
rear·panel GRAT/READOUT SINGLE SHOT connector provides one readout frame. When i.n BEAM 2 GATED (push but­
ton DUn one readout frame is displayed at the end of beam 2 sweep.
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READOUT PRESET Adjustment (PULSED operation only)-Sets PULSED readout intensity.
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6R EADOUT iNTENSITY Controll_Activates and controls brightness of the alphanUmeric display or activates the PULSED
readout functions.
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Ground Connector (not marked)-Binding post to establish common ground between associated equipment.
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8Current LoOp{not marked)
7844-Provides 40 mA square-wave current (1 kHz) when the CALIBRATOR switch is set to 40 rnA position.
R7844-Provides 40 rnA square·wave current (1 kHz) when optional eurrent loop adapter is connected to the CALlBRA·
TOR connector and the CALIBRATOR switch is set to 4 V position.
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HORIZ SEP (1) Control-Horizontally positions beam 1 display.
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ENHANCER PRESET Adjustment1 (Option 22 only; not shown).
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tB TRIG SOURCE Control-selects LEFTVERTOr RIGHT VERT compartment as the source of internal trigger signal for
B HORIZ compartment.
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BEAM 2 HORIZONTAL MODE Control-A HORIZ or B HORIZ compartments can be selected to control beam 2.
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3A TRIG SOURCE Control-SelectsLEFT VERTOr RIGHT VERT compartment as the source of internal trigger signal for
the A HORIZ compartment.
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BEAM 2 8EAMFINDER (LOCKS IN) Control-Intensifies and locates beam 2 display.
VERT SEP (1) Control (deleted with Option 21 I-Provides positioning of beam 1 when both beam 1 and beam 2 are being
controlled by the same vertical compartment.
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BEAM 2 VERTICAL MODE Control {deleted with Option 21 )-Allows beam 2 to be controlled by either the LEFT VERT
or RIGHT VERT compartments.
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BEAM 1 VERTICAL MODE Control (deleted with Option 21 I-Allows beam 1 to be controlled by either the LEFT VERT
or RIGHT VERT compartments.
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PROBE POWER Connectors (two)-Provide power for active probe systems (located on rear panel of 7844).
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BEAM 1 BEAM FINDER (LOCKS IN) Control-Intensifies and locates beam 1 display.
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BEAM 1 HORIZONTAL MODE Control-A HORIZ or B HORIZ eompartments can be selected to control beam 1.
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Camera Pow�r Connector (not markedl-Three-pin connector provides power for camera operation and receives single­
sweep reset signal.
1 Refer to Instrument Options section for instruments equipped with the Writing Speed Enhancer (OPtion 22).
Fig. 1-1 (cont.). Front"panel controls and connectors.
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