Tektronix 1760 series User Manual Download Page 47

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At A Glance

1760 Series Component Waveform/Vector Monitor User Manual

2-9

Fuse

The instrument’s mains fuse should be replaced only
with a 250V, 2A, F-type cartridge fuse. A replace-
ment fuse is included with the instrument.

AC Power

The

AC POWER

plug is a standard ac plug receptacle

for 120 or 240 Vac power mains. The plug is
compatible with any of the power cord options
available with the 1760--Series. The monitors
operate at 50 and 60 Hz, over the range of 90--250
Volts, without operator adjustment.

Fan Filter

Four replacement air filters for the fan are included
with the instrument. Refer to page C-1 for replace-
ment and cleaning instructions.

Summary of Contents for 1760 series

Page 1: ...User Manual 1760 Series Component Waveform Vector Monitor 070 8473 05 This document supports firmware version 2 2 and above www tektronix com ...

Page 2: ... and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc P O Box 500 Beaverton OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc ...

Page 3: ...o any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improp...

Page 4: ......

Page 5: ...r the country of use Connect and Disconnect Properly Do not connect or disconnect probes or test leads while they are connected to a voltage source Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding con ductor must be connected to earth ground Before making connections to the input or output terminals of the product e...

Page 6: ...omponents when power is present Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Do Not Operate in Wet Damp Conditions Do Not Operate in an Explosive Atmosphere Keep Product Surfaces Clean and Dry Provide Proper Ventilation Refer to the manual s installa tion instructions for details on installing the product so ...

Page 7: ...uct DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately ac cessible as you read the marking CAUTION indicates a hazard to property including the prod uct Symbols on the Product These symbols may appear on the product CAUTION Refer to Manual WARNING High Volt age Double Insu lated Protective Ground Earth Terminal Not su...

Page 8: ...General Safety Summary 1760 Series Component Waveform Vector Monitor User Manual iv ...

Page 9: ...5 CRT Options 1 6 Accessories 1 7 Standard Accessories 1 7 Optional Accessories 1 7 Field Upgrade Kits 1 8 Installation 1 9 Packaging for Shipment 1 9 Electrical Installation 1 10 Mains Frequency and Voltage Range 1 11 Remote Connector 1 11 RS232 Connector 1 11 Mechanical Installation 1 12 Cabinets 1 12 Custom Installation 1 12 Rackmounting 1 13 Instrument Configuration 1 15 ...

Page 10: ... 2 12 Procedure 2 13 Operation Basics Functional Overview 3 1 Display Modes 3 1 Vector 3 1 SCH Option SC Only 3 2 Waveform 3 2 Audio 3 2 Lightning 3 3 Diamond 3 3 Bowtie 3 4 Picture 3 4 Time Code 3 4 Multiple 3 4 Displaying a Signal 3 5 Inputs 3 5 A123 B123 3 5 Parade 3 5 Overlay 3 6 Sweep 3 6 Using the Menus 3 7 General Menu Information 3 7 Multi Use Bezel Controls and Buttons 3 7 Moving Between ...

Page 11: ...STANDARD 3 22 OFFSET 3 23 CALIBRATE 3 23 REMOTE 3 25 REFERENCE 1765 Only 3 25 Gain Menu 3 26 CRT Menu 3 27 Remote Operation 3 29 Using Presets through the Remote 3 29 Making Measurements Basic Measurements 4 1 Waveform Graticule 4 1 Horizontal Scale 4 1 NTSC Vertical Scales 4 2 PAL Vertical Scale 4 3 Dual Standard Vertical Scale 4 3 Making Waveform Measurements 4 4 Horizontal Sync Amplitude 4 4 Pe...

Page 12: ...sing the Bowtie Display 4 19 Time Code Display 4 21 Calibration 4 2 Adjusting Instrument Gain 4 2 Appendices Appendix A Performance Specifications A 1 Reliability A 1 Electrical Specifications A 2 Certifications and compliances A 15 Appendix B Remote Connectors B 1 Remote Connector Converter B 4 Appendix C User Service C 1 Cleaning or Replacing the Fan Filter C 1 Fuse Replacement C 1 Graticule Lig...

Page 13: ...CH phase 2 21 Figure 2 12 Two Field SCH R Y display PAL showing proper SCH phase 2 21 Figure 2 13 Line Select display with 15H selected in 2 FIELD sweep 2 22 Figure 2 14 Vectorscope color bar display 2 23 Figure 2 15 Picture mode display of color bar signal 2 24 Figure 2 16 Audio display with phase error 2 24 Figure 2 17 NTSC SCH display with internal reference selected 2 25 Figure 2 18 PAL SCH di...

Page 14: ...re 4 10 Two Field SCH R Y display NTSC showing proper SC H phase 4 13 Figure 4 11 Two Field SCH R Y display NTSC showing approximate 10 phase error 4 14 Figure 4 12 Two Field SC H R Y display PAL showing proper SC H phase 4 14 Figure 4 13 Audio displays 4 15 Figure 4 14 Lightning display showing correct timing 4 16 Figure 4 15 Lightning display showing delay 4 18 Figure 4 16 Diamond display showin...

Page 15: ...umber information User Manual Instrument controls and readouts appear in ALL CAPITALS Topics covered in the user manual are as follows Introduction Getting Started Operation Basics Making Measurements Appendix A provides instrument specifications both electrical and mechanical Appendix B describes remote control interfaces Appendix C covers routine service procedures such as replacing fuses and gr...

Page 16: ...er Manual xii Service Manual Topics covered in the service manual are as follows Specifications Operating Information Theory of Operation Performance Verification Adjustment Procedures Maintenance Options Electrical Parts List Diagrams Mechanical Parts List ...

Page 17: ...Preface 1760 Series Component Waveform Vector Monitor User Manual xiii 1761 Component Waveform Vector Monitor ...

Page 18: ...tektronix com Sales support 1 800 833 9200 select option 1 Service support 1 800 833 9200 select option 2 Technical support Email techsupport tektronix com 1 800 833 9200 select option 3 6 00 a m 5 00 p m Pacific time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tek...

Page 19: ...Introduction ...

Page 20: ......

Page 21: ...oma gain and interchannel timing for standardized playback of component video recordings In addition to component monitoring all the composite wa veform and vector monitoring capabilities of the 1740A Se ries monitors are included in the 1760 Series monitors The following products are available 1760 NTSC 1761 PAL 1765 NTSC PAL dual standard The 1760 Series monitors can also be ordered with an SCH ...

Page 22: ...ay Option SC only H External staircase from a camera control unit can be selected remotely H Internal video filters provide specialized measurements with dual or triple filter modes available in PARADE or OVERLAY H Eight video inputs can be individually displayed or selected in various combinations H Nine front panel setups can be stored for recall H Universal power supply accommodates AC supplies...

Page 23: ...allax free internal graticule structure contains targets and markings for both the vector and waveform functions A white phosphorus CRT is option al refer to page 1 6 for details The bright CRT allows use in high ambient light conditions such as those encountered in field production applications Calibrator Vertical and horizontal instrument gain can be set using the calibrator signal The 1 Volt ca...

Page 24: ...Product Description 1 4 1760 Series Component Waveform Vector Monitor User Manual ...

Page 25: ...1750A Series instruments Power Cord Options Any of the following power cord options can be ordered for the 1760 Series If no power cord option is specified instru ments are shipped with a North American 125 V power cord and one replacement fuse Unless otherwise specified power cords for use in North America are UL listed and CSA certified Cords for use in areas other than North America are approve...

Page 26: ... Option A4 Power North America 250V 10 A Power Cord Option A5 Power Swiss 240 V 6 A Power Cord CRT Options The standard instrument is shipped with a P31 green phos phor CRT installed If Option 74 is ordered the instrument is shipped with a P4 white phosphor CRT installed ...

Page 27: ...er all other countries 161 0066 XX 1 Fuse cartridge 3AG 2A 250V fast blow 159 0021 00 4 Light bulbs graticule scale 150 0168 00 See page C 1 for replacement instructions 4 Air filters fan 378 0335 00 See page C 1 for replacement instructions This accessory is installed on the product 1 CRT filter smoke gray 378 0258 00 Optional Accessories Manual service 1740A 1750A 1760 Series 070 8469 XX Camera ...

Page 28: ...ack 1700F06 Blank Panel If only one section of a 1700F05 is used the 1700F06 Blank Panel can be inserted in the unused section to improve appearance and air flow 1700F07 Utility Drawer When only one side of a 1700F05 is used this utility drawer can be installed in the unused section to provide storage The drawer opens and closes freely unless latched for transport Ordering These items can be order...

Page 29: ...ual H Service Manual Note The Service Manual is an optional accessory that must be ordered to be received H Power Cord H Replacement Fuse Cartridge 1 H Replacement Graticule Light Bulbs 4 H Replacement Air Filters for Fan 4 Packaging for Shipment If you ship an instrument to a Tektronix Service Center fol low these packaging instructions 1 Attach a tag to the instrument showing the owner complete ...

Page 30: ...urethane foam between the instru ment and the carton If using Styrofoam kernels overfill the box and compress by closing the lid There should be three inches of tightly packed cushioning on all sides of the instrument 3 Seal the carton with shipping tape industrial stapler or both Electrical Installation Power Source These monitors are designed to operate from a single phase power source having on...

Page 31: ...rovides the input for RGB YRGB staircase external horizontal and remote sync For more information about the remote connector see page 2 8 and page B 1 RS232 Connector The rear panel RS232 connector is a 9 pin subminiature D type connector that provides a serial interface for remote control The RS232 pin assignments are on page B 1 Operational Changes No operational modifications are made to these ...

Page 32: ...e 1700F02 is a portable cabinet with han dle feet flipstand and front cover Ordering information is given on page 1 8 WARNING Do not lift a cabinetized instrument without instal ling the mounting screws There is nothing to hold the instrument in the cabinet if it is tipped forward Custom Installation For applications such as consoles the instrument can be mounted with front molding flush or protru...

Page 33: ...earance for power cord and cable connections and 20 in ches in front of a rack for installation and removal of the instrument The optional 1700F05 rack adapter allows two Tektronix half rack instruments to be mounted side by side in a rack If only one section of the rack adapter is used a 1700F06 blank panel or 1700F07 utility drawer can be inserted in the unused section See page 1 8 for ordering ...

Page 34: ...Installation 1760 Series Component Waveform Vector Monitor User Manual 1 14 ...

Page 35: ...5 Instrument Configuration Focus scale illumination signal intensity readout intensity and trace rotation are set through the CRT menu Several instrument operating parameters can be set through the CONFIG menu Instructions for using these menus begin on page 3 20 ...

Page 36: ...Instrument Configuration 1760 Series Component Waveform Vector Monitor User Manual 1 16 ...

Page 37: ...Getting Started ...

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Page 39: ...e current switch selection POWER H ON STANDBY turns the instrument on or to standby status An LED indicates when power is on WARNING If an appropriate power source is supplied to this instru ment line voltage will be present even when in STANDBY mode Do not operate the instrument without a cabinet or rack adapter such as those described on page 1 8 serious injury could result Instrument Reset Cert...

Page 40: ...onix at the phone number listed in the front of this manual Multi use Controls H The center three controls located under the CRT have functions assigned and labeled through the on screen menus and readouts These controls will be referred to as Bezel Controls See Figure 2 1 H Five small buttons along the right side of the CRT enable users to make selections from on screen menus These buttons will b...

Page 41: ... B3 CH A3 CH A2 CH B2 CH B1 CH A1 CH B CH A VECTOR WAVEFORM TIME CODE MENU SWEEP FILTER CURSOR LIN SEL PRESET CONFIG GAIN CRT POWER ON STANDBY LINE FIELD MAG DC REST RESTORE REF EXT CLEAR MENU VERT POS HORIZ POS A 123 PICTURE B 123 WAVEFORM VECTOR MONITOR SCH AUDIO LIGHTNING BOWTIE 1760 Figure 2 2 1760 Front Panel ...

Page 42: ... amplitude and phase is monitored using a calibrated X Y Lissajous display H SCH OPTION SC ONLY provides a vector display of the subcarrier to horizontal sync phase relationship H LIGHTNING provides a LIGHTNING or DIAMOND component display determined by the CONFIGURE FORMAT menu setting H DIAMOND evaluates the GBR signal for gamut limit violations and color errors due to gamma correctors H LIGHTNI...

Page 43: ...lections not available with PARADE or A123 or B123 display H MAG turns on the sweep magnifier See page 3 6 DC REST H RESTORE turns the DC Restorer on or off Set DC restorer speed and clamp point through the CON FIGURE menu shown on page 3 20 REF H EXT toggles between external EXT LED on and internal reference Internal reference can be config ured for component operation and two external reference ...

Page 44: ...123 can be displayed together and in combination with other inputs H PARADE displays up to four input channels side by side with any additional inputs overlaid Selecting PARADE displays the input channel s last selected for PARADE allowing a custom configuration of inputs In PARADE mode the LINE FIELD button offers only two choices one line and one field H OVERLAY provides an overlaid display of a...

Page 45: ... the user to configure several operat ing parameters such as input coupling dc restorer speed and internal reference designation H GAIN provides selection of X1 X5 X10 and variable gain H CRT menu allows adjustment of CRT focus signal intensity and trace rotation H CLEAR MENU turns off the selection portions of the menu readout When CLEAR MENU has been used to clear a menu readout push the menu bu...

Page 46: ...h the front panel REF EXT switch the LED lights to show when external is selected The instrument will operate from external references of composite video or black burst Outputs H PIX OUT is a 75 Ω compensated output of the video signal selected by the front panel INPUT switches This signal has bright up in LINE SELECT mode and is used to drive a picture monitor PIX OUT strobe is not present below ...

Page 47: ...C Power H The AC POWER plug is a standard ac plug receptacle for 120 or 240 Vac power mains The plug is compatible with any of the power cord options available with the 1760 Series The monitors operate at 50 and 60 Hz over the range of 90 250 Volts without operator adjustment Fan Filter H Four replacement air filters for the fan are included with the instrument Refer to page C 1 for replace ment a...

Page 48: ...SPANNUNG KLEINER ALS 20KV AUSREICHEND ABGESCHIRMT B B1 B2 B3 WARNING TO AVOID ELECTRICAL SHOCK THE POWER CORD PROTECTIVE GROUNDING CONDUCTOR MUST BE CONNECTED TO EARTH GROUND PIX OUT EXT REF REPLACE FUSE WITH 250V 2A F TYPE 110 VA MAX 90 250V 50 60 HZ 75 OHM LOOP THROUGH COMPENSATED B G R REMOTE 14 1 13 25 1 5 6 9 RS232 Figure 2 3 1760 Series Rear Panel ...

Page 49: ...ck the operation of the associated equip ment If the associated equipment is operating normally refer the 1760 Series to qualified service personnel for repair or adjustment Required Equipment The following equipment is required to perform this proce dure 1 Television Signal Generator with Composite Color Bars Component signal Y B Y R Y Channel Timing Bowtie Black Burst or comparable signal with b...

Page 50: ...ut Connect the CH A loop through to the EXT REF input and connect a 75Ω terminator to the EXT REF loop through See Figure 2 4 H Connect the generator Y output to the CH A1 input Connect B Y to CH A2 and R Y to CH A3 Connect a 75Ω terminator to each loop through H Set the generator FORMAT to NTSC COMPOSITE for PAL A A1 A2 A3 B B1 B2 B3 EXT REF 1760 SERIES NTSC NTSC Y Y B Y R Y TSG 130 SERIES Figure...

Page 51: ...e right bezel control for desired readout intensity Select TRACE and adjust the center bezel control for a level trace Exit the CRT menu The changes made while in the menu remain in effect 3 Input Channel Selection Press the CH A CH B button to toggle from the CH A input to the CH B input no signal applied Press the CH A1 CH B1 button This cancels the CH B input and displays the CH A1 input Press ...

Page 52: ...annel buttons including A123 B123 sequence through A B both and off Press the CH A3 CH B3 input repeatedly until it sequences through B both off and back to A CH A3 selected Press the CH A button Note that this now adds to the display rather than cancelling the previous input selection Up to four inputs can be shown in parade and any additional signals are overlaid Press the PARADE OVERLAY button ...

Page 53: ...r the configuration menu and select CALIBRATE Turn on the calibrator signal and note that the amplitude is 140 IRE 1 0 V PAL with one cycle per division See Figure 2 6 Select VECTOR display mode Note that the calibrator signal overlays the compass rose Return to WAVEFORM display mode Exit the configuration menu Note that the calibrator signal is automatically turned off For more information on usi...

Page 54: ...our selections one line two line one field and two field sweeps Return to the two field sweep Press the MAG button The MAG indicator lights and a 1 S Div sweep is displayed Use the HORIZ POS control to view the magnified display then turn off the MAG See page 3 6 for a list of sweep rates 7 Voltage and Timing Cursors The 1760 Series voltage timing and vector cursors can be used to measure any port...

Page 55: ...orm graticule Select VECTOR display mode The vector cursor menu is displayed POLAR has been selected by the factory preset The polar cursor appears as cross hairs Use the left bezel control to move the cursor away from graticule center and the center bezel control to move the cursor around the graticule center point Note that the amplitude and phase of the cursor are displayed on screen Select MAR...

Page 56: ...e luminance portion of the signal See Figure 2 7 10 S DIV FLAT LUM CHROM DIFF R Y SCH R Y F L F L C Figure 2 7 Two Line LUM filter display of color bar signal Select CHROM This provides a bandpass filtered display of the chrominance portion of the signal See Figure 2 8 Select F L FLAT plus LUM The flat display is superim posed on the luminance filtered display overlay is selected by the factory pr...

Page 57: ...ars similar to Figure 2 9 Select R Y This provides a demodulated chrominance vs time display Use the right bezel control to adjust vector phase See Figure 2 10 Select SCH R Y Option SC only This provides a demodu lated SCH sync locked oscillator display useful for viewing SCH variations versus time A sample NTSC display is shown in Figure 2 11 NTSC signals can be viewed in either line or field swe...

Page 58: ...rm Vector Monitor User Manual 2 20 10 S DIV FLAT LUM CHROM DIFF R Y SCH R Y F L F L C Figure 2 9 Two Line DIFF filter display of 5 step staircase signal VECTOR PHASE FLAT LUM CHROM DIFF R Y SCH R Y F L F L C Figure 2 10 Two Line R Y display of color bar signal ...

Page 59: ...Monitor User Manual 2 21 VECTOR PHASE FLAT LUM CHROM DIFF R Y SCH R Y F L F L C Figure 2 11 Two Field SCH R Y display NTSC showing proper SCH phase VECTOR PHASE FLAT LUM CHROM DIFF R Y F L F L C SCH R Y Figure 2 12 Two Field SCH R Y display PAL showing proper SCH phase ...

Page 60: ...nsified in each field intensified portion appears wider The readout is now ALL 131 145 See Figure 2 13 Select 1 of2 Now only the first field has intensified lines and a NEXT FIELD selection appears Select NEXT FIELD and note that the intensified lines now appear only in the second field and the readout is F2 131 F2 145 Select MULTIPLE with WAVEFORM VECTOR and SCH Note that the displays appear in t...

Page 61: ...ars This can be used to visual ly identify the signal source See Figure 2 15 12 Audio Display To obtain an audio display connect the left and right audio signals to the rear panel REMOTE connector as follows Y to pin 8 Y to pin 9 X to pin 10 and X to pin 11 Select AUDIO display mode An audio signal with no phase error appears as a straight line extending from the audio box in the upper right corne...

Page 62: ...Operator s Checkout Procedure 1760 Series Component Waveform Vector Monitor User Manual 2 24 Figure 2 15 Picture mode display of color bar signal Figure 2 16 Audio display with phase error ...

Page 63: ... measurements appear on page 4 10 For NTSC operation verify that REF is set to internal then select SCH display mode This provides a dual dot display as shown in Figure 2 17 Select EXT REF This provides the single dot display shown in Figure 2 18 For PAL operation the REF selection does not affect the display A sample PAL display is shown in Figure 2 18 VECTOR PHASE Figure 2 17 NTSC SCH display wi...

Page 64: ...menu and select FORMAT Select the proper format for your signal source GBR SMPTE EBU BETA or MII Under DISPLAY select LIGHTNING Leave the configuration menu selected Select LIGHTNING display mode The display should be similar to Figure 2 19 Under DISPLAY select DIAMOND Select 100 Bars on the signal generator Figure 2 20 shows a sample display Exit the configuration menu Information on using the Li...

Page 65: ...E REFERENCE FORMAT DISPLAY LIGHTNING DIAMOND 525 60 GBR SMPTE EBU BETA MII 625 50 GBR SMPTE EBU BETA MII Figure 2 19 Lightning Display in MII Format R INPUT VECTOR STANDARD OFFSET CALIBRATE REMOTE REFERENCE FORMAT DISPLAY LIGHTNING DIAMOND 525 60 GBR SMPTE EBU BETA MII 625 50 GBR SMPTE EBU BETA MII B G G Figure 2 20 Diamond display showing signal within gamut limit ...

Page 66: ...Bowtie display select the Channel Timing signal from the generator Select BOWTIE display mode on the 1760 Se ries The display should appear similar to Figure 2 21 Information on making measurements with the Bowtie display appears on page 4 21 Figure 2 21 Bowtie display This concludes the Operator s Checkout Procedure ...

Page 67: ...Operation Basics ...

Page 68: ......

Page 69: ...odes Composite Component H VECTOR H SCH Option SC only H WAVEFORM H AUDIO H LIGHTNING and DIAMOND H BOWTIE H PICTURE H TIME CODE H MULTIPLE displays Vector The vector mode presents an XY plot of demodulated chromi nance phase and amplitude The angle represents chromi nance phase and the distance from the center represents chrominance amplitude A bezel control is assigned to adjust VECTOR PHASE Wit...

Page 70: ...ing eliminates the require ment for a precise horizontal timing match between the refer ence and measured signals Waveform The waveform monitor portion of the instrument provides a voltage versus time display of the video signal The selected input can be displayed in one or two line or one or two field sweeps In LINE SELECT mode identified lines of any field can be selected and displayed Multiple ...

Page 71: ...dures for using the Lightning display can be found in the Operator s Checkout and on page 4 16 NOTE A123 or B123 must be configured as a compo nent input See CONFIGURE menu page 3 20 Diamond For a Diamond display push the LIGHTNING button and use the CONFIG FORMAT menu to set DISPLAY to DIAMOND Apply a component signal to the rear panel connectors for CH A1 A2 and A3 or CH B1 B2 and B3 The Diamond...

Page 72: ...u page 3 20 Picture The PICTURE mode allows the operator to verify the signal source In PICTURE mode with LINE SELECT on a bright up marker identifies the selected line in the picture Time Code Longitudinal time code is monitored in a frame rate display to allow observation of amplitude synchronization and phase with respect to reference vertical sync Synchroniza tion is confirmed by the stationar...

Page 73: ...shing an input channel button sequences through the labeled channels both then off Push ing another input button does not cancel the current selec tion but adds to it To return to single input operation push the PARADE OVERLAY button until it is off LED is no longer lighted A123 B123 Selecting A123 provides a side by side display of the CH A1 CH A2 and CH A3 inputs B123 displays the CH B1 CH B2 an...

Page 74: ...FIELD toggles through four sweep rate selections one line two line one field and two field In PARADE mode the LINE FIELD button becomes a two way switch toggling be tween line and field The sweep rate is displayed in the upper right corner of the CRT for field rate sweeps 1 F or 2 F is displayed The MAG button is used with LINE FIELD to provide horizontal magnification of each rate as follows H On...

Page 75: ...he right side of the CRT referred to as bezel buttons to change the selec tions The center three controls under the CRT are referred to as Left Center and Right bezel controls Control functions vary with menu choice a readout just above each active con trol shows its present function These controls are used as variable analog controls to set values such as phase ampli tude and intensity The left c...

Page 76: ...ed completely when CLEAR MENU is pushed Exiting a Menu Function To exit a menu function while its display is present push that menu button The menu button is functioning as an on off toggle switch If the menu display is not present but the menu function is still in effect LED is lighted push the menu button to bring back the full display then push it again to exit the menu VERTPOS HORIZPOS Bezel C...

Page 77: ...ps are translated into impulses for amplitude compari son H R Y selects demodulated chrominance versus time display The chrominance is demodulated on the R Y V axis when burst is lined up on the normal axis The VECTOR PHASE control can adjust the demodulator phase to any axis H SCH R Y Option SC Only demodulates the SCH sync locked oscillator This display is useful for viewing SCH variations versu...

Page 78: ...sor amplitude and the center con trol adjusts cursor phase The right bezel control adjusts the phase of the vector signal When Vector markers are selected additional readouts ap pear allowing the user to select the quantity of markers that will be present 1 through 8 and which of these markers is currently controlled by the bezel controls The left bezel control adjusts the amplitude of the selecte...

Page 79: ... timing cursors are selected TIME the left bezel control is used to adjust the horizontal position of the first timing cursor and the center control adjusts the horizontal position of the second timing cursor The right bezel control moves both cursors horizontally in tandem The readout T shows the time difference positive or negative between the two cursor positions up to four significant digits H...

Page 80: ...mV VOLT TIME MARK V T Left Center Right WFM CURSOR Figure 3 3 The WAVEFORM CURSOR menu VERTPOS HORIZPOS CLEAR MENU VOLT1 VOLT2 TRACK V 700 mV VOLT TIME MARK V T WFM CURSOR VEC CURSOR POLAR MARK CONTROL VOLT TIME Voltage Cursor 1 Voltage Cursor 2 Timing Cursor 1 Timing Cursor 2 Figure 3 4 The VECTOR WFM CURSOR menu with V T selected ...

Page 81: ... measure the amplitude and phase of the chrominance signal When POLAR is selected position the cursor cross hairs with the AMPLITUDE and PHASE bezel controls and view the amplitude and phase readouts at the top of the screen See Figure 3 2 When a component signal is displayed A 1 2 3 or B 1 2 3 it will be encoded so that the readout phase and amplitude matches that of a composite signal This featu...

Page 82: ...ols to one of these markers Markers are designed to be used for refer ence points there is no quantitative readout Markers are positioned with respect to the graticule and are not moved or resized with the signal When CLEAR MENU is pressed all of the marker readout ex cept the boxes will be removed The readout will be restored when CURSOR menu is selected again When CURSOR menu is exited and re en...

Page 83: ...10 gain or with VAR gain on Timing Cursors can be used to make accurate time measure ments When TIME is selected position the TIME1 cursor at the left excursion of the signal to be measured and the TIME2 cursor on the right The on screen readout gives the time difference between the two points When MAG is selected the timing cursors maintain their rela tionship with the signal For example if the V...

Page 84: ...y the FIELD selection A box flashes momentarily around the on screen label to verify that the selection has been made 1760 Series Option SC H FIELD ALL or 1of2 or 1of 4 or 1of8 H 1H or 15H one line or 15 lines H NEXT FIELD Appears only when 1of 2 1of4 or 1of 8 FIELD is selected Push the corresponding bezel button to sequence through the fields desig nated by the FIELD selection H ALT 2 FIELD Appea...

Page 85: ...er menu is selected but the selected line and field are displayed until the line select menu is exited The field and line readout re mains in the upper left of the screen and the line select LED remains lighted to indicate this state Line select can also be used with MULTIPLE displays of WAVE FORM VECTOR and SCH Selected displays appear on the screen in the following order WAVEFORM VECTOR SCH The ...

Page 86: ...screen menu illustrated in Figure 3 5 Turn the left bezel control to select the PRESET location to be acted on presets 1 9 are available through the menu Next use the bezel button corresponding to the desired action RECALL STORE RENAME OR RECOV ER When a bezel button is pushed a box flashes momen tarily around the on screen label to verify that the selection has been made VERTPOS HORIZPOS CLEAR ME...

Page 87: ...T to store the current front panel settings at the outlined PRESET location Push the bezel button corre sponding to RETURN if storing is not desired This will can cel and exit the STORE operation Rename Selecting RENAME will provide an on screen display assign ing the center and right bezel controls to LOCATION and LET TER Turn the center control to select the letter that will be changed move the ...

Page 88: ...selection INPUT H COUPLING Selects AC or DC coupling for rear panel inputs H DC RESTORER Selects the clamp speed Slow will clamp while displaying any hum H CLAMP Selects the point of the video signal that is clamped to 0 Can be set for ST sync tip or BP back porch VERTPOS HORIZPOS CLEAR MENU Bezel Buttons Left Center Right INPUT VECTOR FORMAT STANDARD OFFSET CALIBRATE REMOTE REFERENCE COUPLING AC ...

Page 89: ...t to accept signals with or without setup H PAL PAL operation only When V is chosen the phase reference of the V lines is inverted then shown as an overlay on the V lines to provide a comparison display V shows V and V on alternate lines H TEST Used by service personnel refer to the service manual FORMAT H CONFIG FORMAT is used to to select the configura tion of signals used for interconnection of...

Page 90: ...d is ignored in all other formats 2 MII is identical to SMPTE EBU in 625 50 1 3 STANDARD H CONFIG STANDARD allows the user to set the cursor unit of measure to MV IRE or AUTO When AUTO is selected cursor units are automatically changed to IRE when operating in the NTSC standard and MV when operating in the PAL standard H For dual standard instruments a menu selection of NTSC PAL or AUTO standard i...

Page 91: ...ligned The selected offset amount will be recalled the next time OFFSET is enabled H When A2A3 OFFSET is on the center and right bezel controls are assigned to CH A2 and CH A3 offsets On screen labels appear just above each control Turning these controls will offset the CH A2 and CH A3 signals with respect to CH A1 When B2B3 offset is on the same two controls are assigned to CH B2 and CH B3 H When...

Page 92: ...In vector mode the user can set the calibrator frequency for dual standard instruments only to NTSC FSC 3 58 MHz or PAL FSC 4 43 MHz H In both waveform and vector modes selecting NTSC FSC or PAL FSC temporarily switches the instrument to the appropriate video standard The standard is restored when changing the selection or when exiting the CALIBRATE menu GAIN CAL ON H In waveform mode the left bez...

Page 93: ... panel REMOTE connector pin 3 to accept External Horizontal or Staircase input STAIRCASE configures the staircase input for 3 step RGB or 4 step YRGB signal BAUD configures the data transmission rate for the rear panel RS232 connector for 1200 4800 or 9600 baud H The remote input is enabled by a TTL low or switch to ground See page 3 29 REFERENCE 1765 Only H NTSC external reference and PAL externa...

Page 94: ... of three calibrated gain ratios can be selected X1 X5 or X10 Variable gain is also available indepen dent of the other gain settings When variable gain is on the left bezel control adjusts signal gain H In Lightning mode the three calibrated gain ratios are available as well as two independent variable gain settings VAR V GAIN adjusts the gain of the vertical portion of the signal and VAR H GAIN ...

Page 95: ...nt readouts When READOUT is selected a test pattern containing a vertical line and a horizontal line is displayed Use the left bezel control VPOS and the center bezel control HPOS until the lines cross at the center of the etched graticule This will compensate for minor shifting of markers due to drift or external magnetic fields particularly if the instrument is moved after the markers are set Th...

Page 96: ...Using the Menus 1760 Series Component Waveform Vector Monitor User Manual 3 28 ...

Page 97: ...in place of a quantitative readout The REMOTE connector is configured for Staircase RGB or YRGB or External Horizontal input through the CONFIGURE menu shown on page 3 20 The user can store and recall up to eight front panel setups through the remote Remote connector pin assignments and an operational description begin on page B 1 Using Presets through the Remote The 1760 Series has 10 presets cap...

Page 98: ...Remote Operation 1760 Series Component Waveform Vector Monitor User Manual 3 30 ...

Page 99: ...Making Measurements ...

Page 100: ......

Page 101: ...to provide optimum brightness for viewing or photographing displays Waveform Graticule There are three versions of the waveform graticule illus trated in Figure 4 1 Figure 4 2 and Figure 4 3 H NTSC composite video graticule 1760 H CCIR composite graticule 1761 H Dual standard graticule 1765 Horizontal Scale The 0 IRE 0 3V graticule line is divided into 12 major divi sions Each division represents ...

Page 102: ...litate compo nent measurements Black level setup is denoted by a dashed line at 7 5 IRE There are 2 IRE and 4 IRE markings at the center of the 40 IRE line to assist in measuring sync amplitude This scale is designed for use with two line or two field sweep rates The graticules are also marked for K Factor tolerances and linear distortion measurements These measurements will be described later in ...

Page 103: ...nts These measure ments will be described later in this section Component signals can be centered on the 35 V line K Factor Audio 100 White Level Baseline Sync Tip Figure 4 2 PAL waveform vector graticule Dual Standard Vertical Scale The dual standard graticule shown in Figure 4 3 combines the two previous scales The 525 60 scale NTSC is on the left side and the 625 50 scale PAL is on the right Th...

Page 104: ...rated for the present operating mode as defined in Table 4 1 Table 4 1 Dual Standard Graticule Scales APPLICABLE GRATICULE SCALE COMPONENT FORMAT 525 60 STANDARD 625 50 STANDARD GBR Left Right SMPTE Right Right BETA Left Right MII Right Right K Factor Setup Audio 100 White Level Baseline Sync Tip 75 White Level IRE Scale Volt Scale Figure 4 3 Dual Standard waveform vector graticule ...

Page 105: ... correspond to 2 IRE division 10 mV division for PAL Measure peak white directly from the graticule or use the voltage cursors K Factor Measurements The boxed area in the upper left corner of the graticule is scaled for 2 and 4 K Factor ratings for precise tilt mea surements This structure is designed to work with an 8 µs half amplitude duration HAD bar The bar tilt measure ment structure can also...

Page 106: ... sure that the center of the bar is at 100 IRE 1 Volt PAL when blanking level is at 0 IRE use VARIABLE GAIN to adjust gain if necessary Use the HORIZ POS control to place the 2T pulse over the center of the boxed measurement area and measure its amplitude When the top of the pulse falls within the dashed lines the K Factor equals 2 or less Vector Graticule The VECTOR display permits measurements o...

Page 107: ...amplitude The dimen sions of the smaller boxes represent 2 5 and 2 5 IRE R Figure 4 4 Vector targets NTSC values PAL values in parentheses PAL For the 1761 graticule each PAL chrominance vector related to the V burst terminates in targets consisting of two boxes a small box inside a large box See Figure 4 2 The large box represents 10 centered on the exact chrominance phase and 20 of chrominance a...

Page 108: ...eform Vector Monitor User Manual 4 8 Dual Standard The 1765 graticule is a composite of the PAL and NTSC graticules There are two inner targets within the larger tar get the PAL target and the NTSC target The NTSC target is inside the PAL target ...

Page 109: ...s a reference When the frequency is changed the diameter of the circle should reduce At a point equal to 70 7 of full amplitude 3 dB there are gaps in the horizontal and vertical axes This calibration aid makes it possible to check the 3 dB points of the demodulator out put amplifiers Differential Phase and Gain Differential gain dG and differential phase d measure ments use the graticule markings...

Page 110: ...ontal sync dot is the SC H phase of the signal With the dual dots SC H phase range is limited to 180 because the SC H phase of a single signal referenced to itself can only vary 90 At 180 the video signal again has a field subcarrier phase sequence making it SC H phased Single Dot Display When REF is set to EXT the 1760 has a single dot display Figure 4 7 This relative mode allows the comparison o...

Page 111: ...m Vector Monitor User Manual 4 11 VECTOR PHASE Burst Vector Sync Dot 0 Axis Sync Dot Relative angle indicates degree of SC H phase Figure 4 6 NTSC dual dot SC H display VECTOR PHASE 0 Axis Burst Vector Sync Dot Figure 4 7 NTSC single dot SC H display ...

Page 112: ... the the EXT REF signal are properly color framed when the sync dot is within 90 of the burst vector VECTOR PHASE Figure 4 8 PAL SC H display SC H R Y SC H phase can be viewed over a frame of video Select WAVEFORM display and FIELD sweep Enter the FILTER menu and select SC H R Y For NTSC stable SC H is a horizontal line as shown in Figure 4 10 Figure 4 9 shows the same display with a LINE sweep se...

Page 113: ...ual 4 13 VECTOR PHASE FLAT LUM CHROM DIFF R Y SCH R Y F L F L C Burst Horizontal Sync Figure 4 9 Two Line SC H R Y display NTSC with proper SC H phase VECTOR PHASE FLAT LUM CHROM DIFF R Y SCH R Y F L F L C Figure 4 10 Two Field SC H R Y display NTSC showing proper SC H phase ...

Page 114: ...m Vector Monitor User Manual 4 14 VECTOR PHASE Figure 4 11 Two Field SC H R Y display NTSC showing approximate 10 phase error VECTOR PHASE FLAT LUM CHROM DIFF R Y F L F L C SCH R Y Figure 4 12 Two Field SC H R Y display PAL showing proper SC H phase ...

Page 115: ...n the lower left A signal with phase error appears as an opening in a Lissajous waveform Figure 4 13 shows three audio input signals that are equal in amplitude but have different phase relationships Audio gain is set from the GAIN MENU when AUDIO display is selected Gain choices are 0 dBu 4 dBu 8 dBu or 12 dBu Select gain relative to the system under test a Correct Phase b Phase Error of 180 c Ph...

Page 116: ... Use the CONFIG FORMAT menu page 3 21 to set DISPLAY to LIGHTNING and select the appropriate format for your system Lightning is most useful in the color difference for mats SMPTE EBU BETA and MII Selecting GBR will pro vide a square display Use the CONFIG VECTOR menu to select 75 or 100 bars This will change the size of the electronic graticule to accommodate the input signal Push CLEAR MENU to c...

Page 117: ...ce axis Check that the signal appears within the targets of the electronic graticule If it is too close to the center dot it is too small too far away it is too large Encoder Accuracy The Lightning display allows the operator to check encoder accuracy by viewing the relative amplitudes of luminance and color difference signals in one display Timing Lightning can also be used for evaluating interch...

Page 118: ...onally larger errors for lower bandwidth signals For signals decoded from composite bandwidth of approxi mately 500 kHz the timing dots represent approximately 120 and 240 ns respectively The transitions will be S shaped due to the narrow band color difference signals Note that correct timing is always indicated by a transition through the center dot regardless of the signal bandwidth If a trace a...

Page 119: ... signal for gamut limit violations To obtain a DIAMOND display input a GBR signal through the rear panel CH A1 A2 and A3 or CH B1 B2 and B3 connectors Push the LIGHTNING button The instrument is forced to a component display A123 or B123 input Use the CONFIG FORMAT menu to select the DIAMOND display See Figure 4 16 Push CLEAR MENU to clear the menu readout R DISPLAY LIGHTNING DIAMOND B G G Figure ...

Page 120: ...ng or parallel to the Diamond graticule All colored areas the bigger the area the brighter the dot are represented by data in both top and bottom diamonds A perfectly monochrome signal would produce a vertical line with luminance proportional to the vertical deflection in creasing upwards in the top diamond and downwards in the bottom diamond Increasing color saturation is indicated by increasing ...

Page 121: ... encoded to composite it produces and illegal sig nal with potential unwanted side effects For a Bowtie display push the 1760 Series front panel BOW TIE button A two line display of component signals will be present line one left half of display shows CH 1 minus CH 2 and line two shows CH 1 minus CH 3 See Figure 4 17 If the bowtie patterns have a sharp null and the null is lo cated in the center o...

Page 122: ...d the difference channels causes the relative phase to change constantly The subtraction process is complete resulting in zero only when the two compo nents are exactly in phase Changes of relative timing change the point at which the null occurs by changing relative phase between the two channels If the amplitudes are not equal the subtraction never yields zero and the null is broadened The Light...

Page 123: ...r connect the video signal containing LTC to the rear panel REMOTE connector as follows pin 12 input pin 13 input and pin 14 ground Push the front panel TIME CODE button The display should be a stable square wave Sync Word The trigger point is FIELD 1 of the applied video wave form either internal or external reference When synchro nized to video the display is stable The sync word should appear o...

Page 124: ...Basic Measurements 1760 Series Component Waveform Vector Monitor User Manual 4 24 ...

Page 125: ...e volume Adjusting Instrument Gain Instrument gain can be adjusted through the CONFIG CALI BRATE menu CONFIG menu is described on page 3 20 Set Vertical Gain 1 To adjust vertical gain select WAVEFORM display mode and push the CONFIG menu button Select CALIBRATE then CAL SIG ON and GAIN CAL ON a Turn the V CAL control until the signal amplitude is 140 0 IRE 1000 mV for PAL as read on the graticule ...

Page 126: ...ivision in 2 LINE SWEEP 10 µs div adjust for one full cycle per major division b Pushing RESET H CAL will cancel any gain adjust ment and reinstate the factory gain setting Set Vector Gain 1 To adjust vector gain select VECTOR display mode and push the CONFIG menu button Select CALIBRATE then CAL SIG ON and GAIN CAL ON a Adjust VECTOR CAL so that the calibration signal circle falls on the compass ...

Page 127: ...Appendices ...

Page 128: ......

Page 129: ...30 C The Performance Re quirement tolerances listed in the Electrical Specification are doubled over the temperature range of 0 C to 50 C unless otherwise specified Test equipment used to verify Performance Requirements must be calibrated and working within the limits specified in the Service Manual Equipment Required List Reference Information Information that amplifies a performance requirement ...

Page 130: ...nputs Variable Gain Range Req 0 2X to 1 4X Overscan Req 1 variation in baseline of chroma when positioned anywhere between sync tip and 100 white RI X1 X5 or X10 with any variable gain setting Video Maximum Operating Input Voltage RI 1 8 V to 2 2 V all inputs A B3 dc peak ac Absolute Video Input Voltage RI 8 5 V to 8 5 V dc peak ac Video Input DC Impedance RI 20kΩ Video Input Return Loss RI Typica...

Page 131: ... 0 1 V RI All inputs ac or dc coupling Luminance Filter Gain Req 1 1 RI Reference is FLAT at 50 kHz Luminance Filter Response Req 3 dB attenuation at 1 MHz 40 dB attenuation at FSC Luminance Filter Chrominance Rejection 1765 only Req 34 dB Chrominance Filter Gain Req 1 1 RI Ref is flat at FSC 3 58 or 4 43 MHz Chrominance Filter Bandwidth Req 1 5 MHz 0 3 MHz RI Centered at FSC Passband is typically...

Page 132: ...uency Response Req 3 to 6 MHz Pix Out Differential Gain RI 1 Pix Out Differential Phase RI 1 Pix Out Output Impedance RI 75Ω Pix Out Return Loss Req 30 dB to 6 MHz Pix Out Line Select Strobe RI A dc offset is added to output in line se lect to bright up the selected line or lines DC Restorer 60 Hz 50 Hz Attenuation Req Slow Mode 10 Fast Mode 95 RI Back porch or sync tip clamp point is selected thr...

Page 133: ...Blanking Shift with Presence and Absence of Burst Req 1 IRE 7 mV PAL RI Typically 3 mV Table A 2 External Reference CATEGORY DESCRIPTION Input RI Composite video or black burst Maximum Operating Input Voltage RI 1 8 V to 2 2 V dc peak ac Absolute Maximum Input Voltage RI 8 5 V to 8 5 V dc peak ac DC Input Impedance RI 20 kΩ Return Loss RI Typically 40 dB to 6 MHz ...

Page 134: ...eld rate sync 2 Field displays two full fields and the field rate sync between them Sweep Linearity Req 1 Line 1 2 Line 1 Magnified Sweep Accuracy Req 1 Line 0 2 s division 1 2 Line 1 0 s division 1 Magnified Sweep Linearity Req 1 Line 1 2 Line 1 Horizontal Position Range Req Any portion of the synchronized sweep can be positioned on screen in all sweep modes External Horizontal Input Req 2 divisi...

Page 135: ...he Color Bar signal Table A 5 RGB YRGB CATEGORY DESCRIPTION RGB YRGB Req Staircase input gain 0 8 V division 10 RI RGB Sweep Length 1 Field 30 of normal 1 Line 30 of normal RI YRGB Sweep Length 1 Field 25 of normal 1 Line 25 of normal RI Maximum staircase operating signal DC signal plus peakacnotto exceed 12 V to 12 V Line or field rate sweep RI Peak to peak acsignal not to exceed 12 V RI Sweep Re...

Page 136: ...ble A 7 Vector Mode CATEGORY DESCRIPTION Input Requirements Req 1 V p p 6 dB RI Instrument freeruns with no input RI External Reference Black burst or com posite video Nominal Subcarrier Frequency FSC RI NTSC 3 579545 MHz PAL 4 43361875 MHz Chrominance Processing Band width 3 dB Req 1 MHz 200 kHz PAL V RI V Axis is inverted at 1 2 video line rate Display Phase Accuracy Error Req 1 25 Display Gain ...

Page 137: ...t Amplitude Change of 6 dB Req 2 Phase Shift With Video Input Channel Change Req 1 RI With external reference selected Typically 0 5 Phase Shift With Variable Gain Control 3 dB to 6 dB Req 0 5 Burst Jitter RI 0 5 rms Clamp Stability Req 1 64 inch 0 4 mm RI Center spot movement with rotation of the phase control Phase Control Range RI 360 continuous rotation Phase Control Quantization RI 0 2 Positi...

Page 138: ... Accuracy Req 0 5 dB RI Measured at 1 kHz Maximum Input Voltage RI 8 V peak RI Measured to chassis ground Bandwidth 3 dB Req 3 dB 200 0 kHz X Y Input Phase Matching Req 1 RI Measured at 20 kHz Table A 9 Time Code CATEGORY DESCRIPTION Input RI Longitudinal Time Code DC coupled differential input Input Impedance RI 20 kΩ Input Amplitude RI 0 4 8 12 dBm full scale Menu selectable for 140 IRE 1 0 V de...

Page 139: ...I 1 Second Displayed Phase Error Caused by CRT Geometry Variations RI 1 25 Input Timing RI Stable display with Video to External Reference timing Color Frame Range RI 70 Color frame correctly identified when applied external refer ence signal is 70 of 0 SCH Table A 11 Component Vector Mode CATEGORY DESCRIPTION Vertical Bandwidth Req 3 dB at 1 0 MHz Horizontal to Vertical Bandwidth Matching Req No ...

Page 140: ...racy Req 2 RI With respect to electronic graticule Horizontal Gain Accuracy Req 2 RI With respect to electronic graticule Electronic Graticule Display RI Ch A1 or B1 is displayed vertically Ch A2 or B2 is displayed horizontally on top half of display Ch A3 or B3 is displayed horizontally on bottom half of display Table A 13 Bowtie Mode CATEGORY DESCRIPTION Common Mode Rejection Ratio Req 34 dB at ...

Page 141: ...to 0 V Table A 15 CRT Display PAL Values in Parentheses CATEGORY DESCRIPTION CRT Viewing Area RI 80 X 100 mm Horizontal 12 5 divisions Vertical 170 IRE 1 19 V Accelerating Potential RI Nominally 13 75 kV Trace Rotation Range Req and 1 from horizontal RI Total adjustment range is typically 8 Graticule RI Internal with variable illumination Table A 16 Power Source CATEGORY DESCRIPTION Mains Voltage ...

Page 142: ...s at 25 55 Hz with 0 020 inch dis placement Military Specification Mil T 28800D Paragraph 1 2 2 Class 3 Mechanical Shock Req Non Operating 50 g s 1 2 sine 11 ms duration 3 shocks per surface 18 total Transportation Req Qualified under NSTA Test Procedure 1A Category II 24 inch drop Humidity Req Will operate at 95 relative humidity for up to five days Do not operate with visible moisture on the cir...

Page 143: ...product complies when installed into any of the following Tektronix instrument enclosures 1700F00 Standard Cabinet 1700F02 Portable Cabinet 1700F05 Rack Adaptor Australia New Zealand Declaration of Conformity EMC Complies with EMC provision of Radiocommunications Act per the following standard s AS NZS 2064 1 2 Industrial Scientific and Medical Equipment 1992 AS NZS 3548 Information Technology Equ...

Page 144: ...ctivity that is caused by condensation must be expected This location is a typical office home environment Temporary condensation occurs only when the product is out of service Pollution Degree 3 Conductive pollution or dry nonconductive pollution that becomes conductive due to condensation These are sheltered locations where neither temperature nor humidity is controlled The area is protected fro...

Page 145: ...lectrical equipment for measurement control and laboratory use Safety Certification Compliance Temperature operating 5 to 40_ C Altitude maximum operating 2000 meters Equipment Type Test and measuring Safety Class Class 1 as defined in IEC 1010 1 Annex H grounded product Overvoltage Category Overvoltage Category II as defined in IEC 1010 1 Annex J Pollution Degree Pollution Degree 2 as defined in ...

Page 146: ...Appendix A Performance Specification A 18 1760 Series Component Waveform Vector Monitor User Manual ...

Page 147: ...ote Pin Functions and Signal Requirements Pin No Function Signal Requirement Miscellaneous Information 1 RGB YRGB Staircase Input External Hori zontal Input 10 V for RGB YRGB 0 5V Sawtooth 9 div of sweep Staircase external horizontal and RGB YRGB selections are made through the menu 10 div of horiz deflection 2 Ground 3 Staircase Ext Horizontal En able Ground TTL low Grounding this pin enables the...

Page 148: ... X Audio Input Max Input 8 V peak Measured to Chassis Ground 11 X Audio Input Max Input 8 V peak Measured to Chassis Ground 12 Time Code Input 10 10V peak Longitudinal Time Code differ ential 13 Time Code Input 10 10V peak Longitudinal Time Code differ ential 14 Ground 15 Not used 16 Not used 17 Preset 1 Ground TTL low Grounding pin 17 recalls front panel setup from preset 1 Grounding pins 17 and ...

Page 149: ... pin 20 recalls setup from preset 4 Grounding pins 20 and 25 stores current setup at preset 4 21 Preset 5 Ground TTL low Grounding pin 21 recalls setup from preset 5 Grounding pins 21 and 25 stores current setup at preset 5 22 Preset 6 Ground TTL low 23 Preset 7 Ground TTL low 24 Preset 8 Ground TTL low 25 Store Ground TTL low Grounding this pin along with one of the Preset pins stores the current...

Page 150: ...the remote cable according to Figure B 2 If the 1760 Series replaces an Option 16 instrument construct the adapter in the same manner omitting the pin 3 to pin 25 connection 13 25 RGB INPUT RGB ENABLE REMOTE SYNC IN GROUND REMOTE SYNC ENABLE 3 19 6 7 5 Remote Plug 14 1 1760 Series Rear Panel REMOTE Connector 25 8 9 10 1 14 13 Do not connect when replacing Option 16 instruments Figure B 2 Using the...

Page 151: ...us Figure B 3 shows the pin assignments DATA CONNECTION PIN NUMBER 1 DCD 2 RXD RECEIVED DATA 3 TXD TRANSMITTED DATA 4 DTR DTE READY 5 SIGNAL GROUND 6 DCR DCE READY 7 RTS REQUEST TO SEND 8 CTS CLEAR TO SEND 9 NOT CONNECTED 1 5 6 9 RS232 Figure B 3 Rear panel RS232 connector NOTE The function of the RS232 connector may not be supported at the time of this printing The RS232 interface is used during ...

Page 152: ...Appendix B Remote Connectors 1760 Series Component Waveform Vector Monitor User Manual B 6 ...

Page 153: ...ean or replace the rear panel fan filter regularly The interval between filter cleaning or replacement is determined by the operating envi ronment To remove the filter take out the two screws that fasten the housing to the rear panel Remove the filter and wash it in a mild detergent and water solution Place cleaned and dried filter or new filter in the housing and replace housing over the fan Repl...

Page 154: ...nformation is given on page 1 7 Required Equipment NOTE For graticule light removal and replacement tweezers with curved serrated tips are recom mended For example Miltex PL312 6 100 equivalent to PL312 or PL317 longer than PL312 CAUTION Needle nosed pliers are not recommended Procedure 1 Remove the five knobs below the CRT 2 Insert a small straight blade screwdriver into the re cessed area on eit...

Page 155: ... install a new bulb hold it with the tweezers as de scribed in step 3 position it in front of the socket and push the bulb until it snaps in place 5 Replace the panel below the CRT and press on both the right and left sides of the panel until it snaps into place 6 Replace the five knobs below the CRT and tighten the set screws Remove these five knobs Remove this panel Recess Recess shaded portion ...

Page 156: ...lene acetone or similar compounds because they may damage the plastic Exterior Clean the dust from the outside of the instrument with a soft clean cloth or small brush A brush is especially useful for removing dust from around the selector buttons knobs and connectors Hardened dirt can be removed using a soft cloth dampened with a mild detergent and water solution Abra sive cleaners should not be ...

Page 157: ...Remove the five knobs below the CRT 2 Insert a small straight blade screwdriver into the re cessed area on either the right or left side of the panel Pry gently until the panel snaps out of the front panel frame See Figure C 1 for panel and recess location 3 Remove the two Torx screws that fasten the bezel to the instrument 4 Grasping the bottom of the bezel pull out and upward to remove the bezel...

Page 158: ...es Component Waveform Vector Monitor User Manual C 6 7 Replace the panel below the CRT and press on both the right and left sides of the panel until it snaps into place 8 Replace the five knobs below the CRT and tighten the set screws ...

Page 159: ...nts 2 1 APR 1993 B010100 Original software 2 2 OCT 1993 New features On screen field sweep indication Configure menu selection for RGB Parade display Audio Time Code unit of measure changed to dBu On screen pointer to left or right side graticule for dual standard Lim ited the 1of4 and 1of8 line select menu entries to insturments with SC H func tion only ...

Page 160: ...Appendix D Software Version 1760 Series Component Waveform Vector Monitor User Manual D 2 ...

Page 161: ...Glossary ...

Page 162: ......

Page 163: ...c pulse and the start of the active picture time Burst is located on back porch Bandwidth The range of frequencies over which signal amplitude remains constant within some limit as it is passed through a system Baseband Refers to the composite video signal as it exists before modulating the picture carrier Composite video dis tributed throughout a studio and used for recording is at base band Beta...

Page 164: ...tinguished from all others and are the part of the signal actually detected by vertical sync sepa rators Bruch Blanking PAL A 4 field burst blanking se quence employed in PAL signals to ensure that burst phase is the same at the end of each vertical interval Burst NTSC A small reference packet of the subcarrier sine wave typically 8 or 9 cycles which is sent on every line of video Since the carrie...

Page 165: ...orrection A process in which the coloring in a television image is altered or corrected by electronic means Care must be taken to insure that the modified video does not exceed the limits of subsequent processing or transmission systems Color Difference Signals Signals used by color televi sion systems to convey color information in such a way that the signals go to zero when there is no color in ...

Page 166: ...ted form modulated onto the pic ture carrier and converts it to baseband 2 The circuits which recover R Y and B Y for NTSC sys tems or U and V for PAL systems from the composite signal Digital Components Component signals in which the values for each pixel are represented by a set of numbers Distortion If a sine wave of a single frequency is put into a system and harmonic content at multiples of t...

Page 167: ...f about 2 2 are typically used for gamma Gamma PAL Since picture monitors have a nonlinear relationship between the input voltage and brightness the signal must be correspondingly predistorted Gamma correc tion is always done at the source camera in television sys tems the R G and B signals are converted to R1 V G1 V and B1 V Values for gamma range from 2 2 to 2 8 Gen Lock The process of locking b...

Page 168: ...qual to 1 140 of the peak to peak amplitude of the video signal which is typically 1 volt The 0 IRE point is at blanking level with sync tip at 40 IRE and white extending to 100 IRE IRE stands for Institute of Radio Engineers the organization which defined the unit Linear Distortion Refers to distortions which are inde pendent of signal amplitude Luminance Y The signal which represents brightness ...

Page 169: ... color difference signals alternates from line to line to help cancel out phase errors Quadrature AM A process which allows two different signals to modulate a single carrier frequency The two sig nals of interest Amplitude Modulate carrier signals which are the same frequency but differ in phase by 90 degrees hence the Quadrature notation The two resultant signals can be added together and both s...

Page 170: ...ctorscope does not display saturation the length of the vectors represents chrominance amplitude In order to verify that the saturation of the colors in a color bar signal is correct you must check luminance amplitudes with a waveform monitor in addition to observing the vectors SCH The timing relationship between the horizontal sync pulses and the zero crossings of the reference subcarrier burst ...

Page 171: ...a signal in the vertical interval of video which makes it possible to accu rately identify an individual field U The B Y signal after a weighting factor of 0 493 has been applied The weighting is necessary to reduce peak modula tion in the composite signal Unmodulated When used to describe television test sig nals this term refers to pulses and pedestals which do not have high frequency chrominanc...

Page 172: ... I is the first color difference signal and Q is the second color difference signal Y PB PR A version of Y R Y B Y specified for the SMPTE analog component standard Y R Y B Y The general set of CAV signals used in the PAL system Y is the luminance signal R Y is the first color difference signal and B Y is the second color difference sig nal Zero Carrier Reference A pulse in the vertical interval w...

Page 173: ...Index ...

Page 174: ......

Page 175: ...Display 4 20 C Cabinets optional accessories installation 1 12 part numbers 1 8 Calibrator Signal frequency 3 24 Specification A 8 Camera 1 7 Carrying case 1 8 Certifications A 15 Chroma bandwidth measurements 3 9 4 8 Clamp point 3 20 Cleaning air filter fan filter C 1 the CRT C 4 the instrument C 4 Clear menu 2 7 Color framing 3 2 Compliances A 15 Component signals 4 3 Component Vector Mode Speci...

Page 176: ... 5 for dual standard monitors 3 25 F Factory preset 3 18 Fan filter cleaning or replacing C 1 part number 1 7 Field sweeps 2 5 Field upgrade kits 1 8 Filter air see fan filter 1 7 Focus 3 27 Front panel controls 2 1 Front panel cover 1 7 Fuse part number 1 7 replacing C 1 G Gain adjustment 4 23 menu 3 26 reset 3 24 3 25 X1 X5 X10 3 26 Graticule illumination 3 27 vector 4 6 waveform 4 1 Graticule l...

Page 177: ...clear menu 2 7 3 8 configure 2 7 3 20 CRT 2 7 3 27 cursor 2 7 3 10 filter 2 7 gain 2 7 3 26 line select 2 7 3 16 multiple menu displays 3 7 preset 2 7 3 18 using the menus 3 7 Multiple display 2 5 3 4 Multi use controls 2 2 O Offsets enable 3 23 Operating standard 1 1 3 22 Operating voltage 1 11 Option SC 1 5 Optional accessories 1 7 Options 1 5 Ordering accessories 1 8 Overlay mode 2 6 3 6 P Para...

Page 178: ... 12 Calibrator A 8 Component Vector Mode A 11 Certifications and compliances A 15 CRT Display A 13 Electrical A 2 Environmental Characteristics A 14 External Reference A 5 Lightning Mode A 12 Measurement Cursors A 7 Physical Characteristics A 14 Power source A 13 RGB YRGB A 7 SCH Phase Mode A 11 Time code A 10 Transcoder GBR Outputs A 13 Vector Mode A 8 Waveform Horizontal Deflection A 5 Waveform ...

Page 179: ...e Specification A 8 Vertical Deflection Specification A 2 Vertical position control 2 4 Viewing hood optional accessory 1 7 Voltage cursors 3 11 W Waveform cursors 3 11 Waveform display 2 4 3 2 Waveform graticule 4 1 Waveform markers 3 11 Waveform Horizontal Deflection Specification A 5 Waveform Vertical Deflection Specification A 2 White phosphor 1 6 Weight A 14 ...

Page 180: ...Index 1760 Series Component Waveform Vector Monitor User Manual I 6 ...

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