Tektronix 7844 Instruction Manual Download Page 26 | Manualshive

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Summary of Contents for 7844

Page 1: ...7 070 1675 00 Product Group COMMITTED TO EXCELLENCE PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL 7844 R7844 DUAL BEAM OSCILLOSCOPE WITH OPTIONS OPERATOR INSTRUCTION MANUAL Serial Num...

Page 2: ...price change privileges are reserved INSTRUMENT SERIAL NUMBERS Each instrument has a serial number on a panel insert tag or stamped on the chassis T he first number or letter designates the country of...

Page 3: ...brator Horizontal System Graticule and Readout Pulsed Operation D ETAI L E D OPERATING INFOR MATI ON Crt Display I ntensity Controls Display Focus Trace AIignment Graticule Light Filters Graticule I l...

Page 4: ...Raster Display SECTION 2 SPECIFICATION INTRODUCTI ON SYSTEM E L ECTRICAL SPECIFICATION STANDARD ACCESSOR I ES SECTION 3 RACKMOUNTING INSTRUCTIONS INTRODUCTION INSTRUM ENT D I MENSIONS RACK D I M ENSI...

Page 5: ...e out track assembly Vertical mounting position of the stationary section and location of the thumb screw securing hole left stationary section shown Details for mounting stationary sections Installin...

Page 6: ...7844 R7844 Operators 7844 DUAL SEAM OSCILLOSCOPE R7844 OPTiON 21 DUAL BEAM OSCILLOSCOPE 1675 12 iv...

Page 7: ...and V ERT SEP control have been deleted Refer to the Options section for details P R E L I MINARY OPERATION To effectively operate this instrument the user must be come familiar with the operation and...

Page 8: ...plug in units refer to the current Tektronix catalog I nstallation of Plug In Units Plug in units can be installed or removed without turning the instrument power off To instal a plug in unit into a c...

Page 9: ...mpartments 3 Turn the POWER switch ON 4 Connect the 4 V CALIB RATOR output to the left and right vertical plug in units with a BNC cable and a dual in put coupler 5 Set the deflection factors of both...

Page 10: ...Operating I nstructions 7844 R7844 Operators 1675 9 Fig 1 1 Front panel controls and connectors 1 4...

Page 11: ...ntrols brightness of the alphanUmeric display or activates the PULSED readout functions Ground Connector not marked Binding post to establish common ground between associated equipment 8Current Lo Op...

Page 12: ...Operating Instructions 7844 R7844 Operators I Fig 1 2 Rear panel controls and connectors 1 6...

Page 13: ...ingle sweep ready signal from time base unit in B HORtZ compart ment A GATE Connector Positive going output for gate signal from the time base unit in the A HORtZ compartment MAIN and DLV O S GATEl Sw...

Page 14: ...ep rate of the time base units located in the A H O R I Z and B HORIZ com partments Notice that the readout display for the time base units corresponds to the sweep rate selected If an ampl lfier unit...

Page 15: ...that the VERT SEP 1 control posi tions beam 1 display above and below the beam 2 display and also that the VERT SEP 1 control is operational only when both beams are being controlled by the same vert...

Page 16: ...that beam 1 display is now triggered 23 Connect the 4 V CAL I BRATOR signal to both verti cal plug in units and set the vertical deflection factors to display two d ivisions of signaL Note that the A...

Page 17: ...N Crt Display I ntensity Controls The 7844 R7844 dual beam oscilloscope has an I NTENSITY control for each of the two beams Each of these I NTEN SITY controls operate independently The BEAM 1 I NTEN S...

Page 18: ...ted filter leave the metal light shield in place and snap the plastic crt mask back into place WARNING Do not remove the clear plastic implosion shield An optional mesh filter is available at extra co...

Page 19: ...e run mode the trace is interrupted for about 20 microseconds for each character displayed NOTE For instruments equipped with Option 22 pho tographic writing speed enhancer refer to Section 4 One comp...

Page 20: ...an be used for checking the basic sweep timing of time base units WAVE SHAPE The square wave output signal of the cali brator can be used as a reference wave shape when checking 1 14 or adjusting the...

Page 21: ...se sweep is not running the A HORIZ time base unit will be displayed Operating Instructions 7844 R7844 Operators Trigger Source The Trigger Source switches allow the horizontal plug in units to acquir...

Page 22: ...lumination to aid in single sweep photography To activate the pulsed functions set the R EADOUT I NTENSITY and G RAT I L LUM controls to the PULSED detent When both the R EADOUT and G RAT I LLU M EXT...

Page 23: ...tors Sampling Displays Sampling system plug in units for the 7000 series oscillo scopes provide displays of fast changing signals that cannot be examined using any other method For example samp ling s...

Page 24: ...ANALYZER PLUG IN UNITS The 7000 series spectrum analyzer plug in units display applied signal amplitude dispersed over portions of the rf spectrum Ab solute signal energy is plotted on the vertical ax...

Page 25: ...ot exceed the distance between the horizontal l ines of the raster Another method of displaying information on the raster is to use the Z AXIS Operating Instructions 7844 R7844 Operators input to prov...

Page 26: ......

Page 27: ...instrument are determined by the choice of p ug in units The following characteristics apply to the 7844 R7844 Oscilloscope only See the System Specification in this section Tables 2 2 and 2 3 for spe...

Page 28: ...GERING LEFT V ERT or RIGHT VERT compartment LEFT VERT or R I G H T VERT compartment HORI ZONTAL Compatible with all 7 series plug in units 1 or less difference between hori zontal compartments 0 1 div...

Page 29: ...pplied to the rear panel G R AT READOUT S I N G L E SHOT connector The graticule is illuminated momentarily when the MANUAL push button is pressed indepen dently of other PULSED modes P31 Specificatio...

Page 30: ...mance Requirement CALIBRATOR Square wave Positive going with baseline near ground 4 mV 40 mV 0 4 V 4 V 0 4 mV 4 mV 40 mV 0 4 V 40 mA 40 mA Within 1 1 kHz withi n 0 25 49 8 to 50 2 250 ns or less into...

Page 31: ...time div switch within 1 5 1 00 ns div maximum 1 Vfunit of time selected by time base time div switch within 1 0 1 fls div maximum MAIN or DLY D gates from time base unit installed in the A H O R I Z...

Page 32: ...tment 0 5 V within 10 10 V within 1 0 up to 1 1s div Supplemental Information 5 ns or less Approximately 950 Q Selected by rear panel switch Derived from the displayed sweep gate is positive going wit...

Page 33: ...nel of the 7844 BNC connector Remote single sweep re set A and B H O R I Z with compatible time base units Switching from the high level 50 V to 10 V sink less than 40 MA to the low level 0 5 V to 5 V...

Page 34: ...weep of beam 2 One readout frame is displayed when an appropriate remote signal is applied to the rear panel G R AT READOUT SINGLE SHOTconnector One readout frame is displayed when the MANUAL push but...

Page 35: ...he vertical specifications which are system dependent For more complete specifications on plug in units for the 7000 Series Oscilloscope System refer to the Tektronix Products catalog TABLE 2 2 7844 R...

Page 36: ...ication Maximum Triggering Calibrated Frequency Performance Feature Sweep Rate Range Delayed Sweep 2 ns div Dc to 200 MHz Ext Amplifier Delaying Sweep 2 ns div Dc to 200 MHz Display Switch 1 ns div Dc...

Page 37: ...erence Interference radiated from the instrument under test within the given limits from 1 50 kHz to 1 000 MHz Conducted I nterference Interference conducted out of the instrument under test through t...

Page 38: ...4 dimensional drawing Refer to Fig 3 6 in Section 3 for the R7844 dimensional drawing STANDARD ACCESSOR I ES R7844 22 S inch 57 9 em 33 1 bs 1 5 0 kg Standard accessories supplied with the 7844 and R7...

Page 39: ...54 9 em iii 1 1 1 2 8 em 23 8 60 5 em NOTE Refer to the Rackmounting section for a dimensional drawing of the R7844 12 0 30 5 em 0 3 0 76 em 0 0 0 CJ CJ 0 CJ CJ 0 0 0 0 0 0 0 O 13 5 12 9 8 EE o 34 5 e...

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Page 41: ...n Fig 3 6 STATIONARY SECTION IMOUNTEO TO RACKI 12 EACHI RACK D I M ENSIONS Height At l east 7 inches of vertical space are required to mount this instrument in a rack This gives enough clearance for a...

Page 42: ...the sta tionary sections using the measurements shown in Fig 3 2 2 Mount the front flanges of the stationary sections to the front rails of the rack with a bar nut and two pan head screws Isee Fig 3...

Page 43: ...K CONFIGURATION LEFT FRONT CORNER OF CABI RACK Rackmounting Instructions 7844 R7844 Operators S L I D E OUT TRACK LUBR ICATION The special finish on the sliding surfaces of the tracks pro vides perman...

Page 44: ...RUMENT TOWARD RACK UNTIL THE LATCHES SNAP I NTO T HEIR HO LES 4 AGAIN PR ESS STOP LATCHES AND PUSH INSTRUMENT INTO RACK 5 SECURE THE INSTRUMENT IN PLACE WITH THE FRONT PANEL SECURING SCREWS DELETE THI...

Page 45: ...OTH SIDES LEFT SIDE SHOWN 2 ALLOW SLIDES TO SEEK PROPER WIDTH 3 CENTER INSTRUMENT 4 RETIGHTEN SCR EWS 5 PUSH THE INSTRUMENT ALL THE WAY INTO THE RACK I F TRACKS DO NOT SLIDE SMOOTHLY CHECK FOR CORR EC...

Page 46: ...Rackmounting I nstructions 7844 R7844 Operators Fig 3 6 R7844 dimensional drawing...

Page 47: ...oviding raster scanning of the crt at the end of beam 2 sweep Option 22 is recommended when a camera equipped with a writing speed enhancer is not available OPERATING INFORMATION CONTROLS AND CONNECTO...

Page 48: ...SITY PULSED ENHANCER control to the PULSED detent Set the ENHANCER PRESET by experi menting with the waveform photograph When the ENHAN CER PRESET level is low counterclockwise the photo graph backgro...

Page 49: ...witch and VERT SEP 1 1 1 settings from Set Up I nformation and Set Up Status Omit steps 1 6 1 7 and 1 8 from Vertical System Familiarization Pro cedure The LEFT VERT unit con trols vertical deflection...

Page 50: ...phor 4 4 TABLE 4 1 cant Option Information Locator Manual Section 4 Instrument Options 2 Specification Location of Information All Operating instructions for Option 22 are included in this section Ele...

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