Datasheet - Liberty Test Equipment
Contents
1. Analog Waveform Monitors 1740A Series 1750A Series 1760 Series Data Sheet Applications Analog Baseband Video Monitoring for Broadcast and Postproduction Applications The 1740A 1750A 1760 Series make up a family of analog video waveform vector monitors with progressive features in support of today s demanding television environment Each model in the series provides improved video performance and ease of operation and incorporates application specific features The family includes the 1740A Series composite analog waveform vector monitors the 1750A Series which adds SCH and color frame verification capabilities and the 1760 Series for mixed format component composite applications While the 1740A and 1750A do provide basic component waveform monitoring capabilities with parade and overlay displays only the 1760 provides full component monitoring capabilities am Bo za Lal La B ai 9 a 1740A Series NTSC PAL and dual standard models in accessory 1700F02 portable Each series includes models for NTSC PAL or dual standard NTSC PAL cases operation For NTSC models the last digit of the model number is 0 1740A 1750A or 1760 1 for PAL 1741A 1751A or 1761 and 5 for Features amp Benefits dual standard NTSC PAL 1745A 1755A or 1765 The family features a common straightforward operator interface allowing the operator to take immediate advantage of the instrument s extens2. A CRT graticule suitable for both standards is provided A microprocessor controlled phase shifter may be activated to rotate the vector display to the correct position on the display Once set for each standard the instrument displays the correct vector rotation when the video standard is changed A new universal input power supply is a part of these monitors AC mains in the range of 90 to 250 V 50 or 60 Hz are accommodated automatically This new power supply will also operate from a nonsinusoidial supply allowing battery operation using an external high efficiency switching inverter A snap lock power cord appropriate to the country of use is supplied with each instrument www tektronix com 3 Data Sheet Multi input waveform parade may be offset to display component signals 4 www tektronix com 2 1dB 1760 Series Lightning Display allows observation of key component values using just color bars Characteristics Waveform Vertical Deflection Deflection Factor 1 0 V 0 2 V x5 gain 0 1 V x10 gain input displayed within 1 of 140 IRE 1 00 V graticule Overscan lt 7 mV variation in base line of chroma when positioned anywhere between sync tip and 100 white Variable Gain Range 0 2x to 1 4x DC Offset Between Channels lt 1 IRE 7 mV Maximum Operating Signal Input Voltage 1 8 V to 2 2 V DC peak AC Absolute Maximum Input Voltage 8 5 V to 8 5 V DC peak AC Signal Input Impedance
3. signal routing and amplification Video performance is tightly controlled providing confidence that the signal display accurately represents the signal under test As an example of this new video performance level the series permits observation of the video signal at up to x10 vertical and x25 horizontal magnification Any part of the signal may be positioned on screen in any magnification Overscan performance at any gain setting is virtually distortion free DC Offset position match between two or more displayed channels is within 1 IRE or 7 mV Loopthrough return loss is better than 40 dB to 10 MHz Operational Flexibility Eight loopthrough video inputs may be connected to the rear panel of the 1740A 1750A 1760 Series eliminating the need for a dedicated routing switcher bus in many applications Any of these inputs may be selected singly or in combination from the front panel or through the RS 232 interface Input selection may also be included in preset configurations recalled using a remote control connector A separate external input may be selected to synchronize the display allowing relative SCH and color framing comparison between two input signals or with the house reference Because a separate SCH evaluation is done on the reference signal SCH and color framing displays are accurate over a wide input range Signal standards can be automatically selected NTSC 525 60 or PAL 625 50 in dual standard 1745A 1755A 1765 models
4. 00F02 Portable cabinet includes handle feet and tilt stand 1700F06 Filler panel covers unused rack space in WFM7F05 1700F07 Drawer half rack fits WFM7F05 dual rack cabinet WFM7F05 Rack adapter dual side by side for WFM700 Series 1700 Series and WFM601 Series 040 1488 xx Kit to add Opt SC to 1760 1761 1765 016 0475 xx Viewing hood 200 3897 xx Snap on front cover Service Opt R5 Repair Service 5 Years CE z ISO 9001 Product s are manufactured in ISO registered facilities v ACEI BY TE DTO COMER FOA CERTAIN www tektronix com 7 Data Sheet www tektronix com Contact Tektronix ASEAN Australasia 65 6356 3900 Austria 41 52 675 3777 Balkans Israel South Africa and other ISE Countries 41 52 675 3777 Belgium 07 81 60166 Brazil 55 11 40669400 Canada 1 800 661 5625 Central East Europe Ukraine and the Baltics 41 52 675 3777 Central Europe amp Greece 41 52 675 3777 Denmark 45 80 88 1401 Finland 41 52 675 3777 France 33 0 1 69 86 81 81 Germany 49 221 94 77 400 Hong Kong 852 2585 6688 India 91 80 42922600 Italy 39 02 25086 1 Japan 81 3 6714 3010 Luxembourg 44 0 1344 392400 Mexico Central South America amp Caribbean 52 55 54247900 Middle East Asia and North Africa 41 52 675 3777 The Netherlands 090 02 021797 Norway 800 16098 People s Republic of China 86 10 6235 1230 Poland 41 52 675 3777 Portugal 80 08 12370 Republic of Korea 82 2 691
5. 1 Horizontal position range any portion of the synchronized sweep can be positioned on screen in any sweep mode External Horizontal 0 5 Vidiv 2 RGB YRGB Staircase input amplitude 12 V maximum DC peak AC not to exceed 12 V or 12 V 10 V 9 div 1 div display Field or line rate front panel selectable Cursor Signals Waveform Mode Accuracy Voltage 0 5 Timing 0 5 for line rate sweeps Vector Mode Accuracy Amplitude 0 5 IRE 0 5 Phase 0 5 Calibrator Signals Waveform Squarewave Amplitude 1 0 V 0 5 Frequency 100 kHz 0 1 Waveform Sinewave Amplitude 1 0 V 0 5 Frequency Nominal subcarrier for standard in use Vector Mode Input Requirements 1 V 6 dB composite video signal or black burst Chrominance Bandwidth 1 MHz 200 kHz Display Phase accuracy within 1 25 Gain accuracy within 2 5 Quadrature phasing within 0 5 Subcarrier Regenerator Pull in range NTSC 50 Hz PAL 10 Hz Pull in time lt 2 s Phase shift with 50 Hz NTSC or 10 Hz PAL F change 2 Phase shift with 6 dB burst amplitude change lt 2 Phase shift with video input change lt 1 Phase shift with variable gain 3 dB to 6 dB 0 5 Burst jitter lt 0 5 RMS Clamp stability lt 1 64 in 0 4 mm Phase control range 360 continuous rotation Differential gain lt 1 Differential phase lt 1 SCH Mode 1750A Series Absolute Accuracy 5 at 25 C Rela
6. 220 KQ 75 Q Loopthrough Return Loss 240 dB to 6 MHz Frequency Response Flat Within 2 to 10 MHz x1 gain Luminance filter gain of flat response Within 1 at 50 kHz lt 3 dB attenuation at 1 MHz 240 cB attenuation at F Chrominance filter bandwidth 1 5 MHz 0 3 MHz Gain within 1 of flat response at Fso attenuation gt 25 dB at 2 x Fs Differentiated step filter gt 40 dB attenuation at Fg Transient Response Preshoot overshoot ringing field rate tilt line rate tilt differential gain 1 or better Pulse to bar ratio 0 99 1 to 1 01 1 Pix Out Gain unity 3 Frequency response 3 to 6 MHz when terminated in 75 Q Differential gain lt 1 Differential phase lt 1 Return Loss gt 30 dB to 6 MHz DC Restorer Slow 10 fast 295 attenuation at 50 Hz and 60 Hz Offset error lt 1 IRE 7 mV Fast settling time lt 6 video lines Blanking shift with 10 to 90 APL change lt 1 IRE 7 mV Blanking shift with presence or absence of burst lt 1 IRE 7 mV Analog Waveform Monitors 1740A Series 1750A Series 1760 Series Waveform Horizontal Deflection Sweep Synchronization triggered by Horiz and Vert sync pulses Freeruns without input Timing Accuracy 1 Line 5 us div 1 2 Line 10 ys div 1 Linearity 1 or 2 Line 1 Magnified Sweep Accuracy 1 line x25 0 2 uS div 1 2 line x10 1 0 pS div 1 Magnified Sweep Linearity 1 or 2 Line Magnified
7. 7 5000 Russia amp CIS 7 495 7484900 South Africa 27 11 206 8360 Spain 34 901 988 054 Sweden 020 08 80371 Switzerland 41 52 675 3777 Taiwan 886 2 2722 9622 United Kingdom amp Ireland 44 0 1344 392400 USA 1 800 426 2200 For other areas contact Tektronix Inc at 1 503 627 7111 Updated 30 October 2008 For Further Information Tektronix maintains a comprehensive constantly expanding collection of application notes technical briefs and other resources to help engineers working on the cutting edge of technology Please visit www tektronix com Copyright Tektronix Inc All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specification and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc All other trade names referenced are the service marks trademarks or registered trademarks of their respective companies 27 Jul 2009 24W 07169 4d Tektronix
8. ative to the color subcarrier vector when the monitor is externally referenced The SCH phase of the reference signal is separately sensed to allow reliable SCH and color framing comparison Using this method of determining relative SCH phase and color framing eliminates the requirement for a precise horizontal timing match between the reference and measured signals and an external color field identification input is not required Analog Waveform Monitors 1740A Series 1750A Series 1760 Series User Interface Characteristic of current generation Tektronix instruments an intuitive operator interface allows full instrument utilization with minimal reference to the provided user and maintenance manuals Operating modes any of eight video inputs and key control knobs and buttons are always available for direct access from the front panel To keep operation easy and straightforward the 1740A 1750A and 1760 family learns the user s preferences for waveform vector and picture modes and SCH in the 1750A and 1760 with the SCH option Returning to one of these modes restores the previous configuration Changes to a mode configuration are easily made using front panel buttons supplemented by screen labeled buttons and knobs Knob operations such as position gain phase etc are stored as well The 1740A 1750A 1760 family is easily configured for special monitoring applications which may be stored in user presets for easy reca
9. h 3 dB 200 kHz X and Y Input Phase Matching lt 1 degree at 20 kHz Input Impedance 20 kQ nominal Time Code Mode Input Longitudinal time code differential Full Scale 0 4 8 and 12 dBm menu selectable Maximum Input Voltage 8 Vp Input Impedance gt 20 KQ CRT Display CRT Viewing Area 80 mm x 100 mm Accelerating Potential Nominally 13 75 kV Trace Rotation Range gt 1 from horizontal Graticule Internal with variable illumination Power Source Mains Voltage Range 90 to 250 VAC Mains Frequency Range 50 or 60 Hz Power Consumption 110 VA maximum 6 www tektronix com DIE IN DIESEM GERAT ENTSTEHENDE RONTGENSTRAHLUNG IST AUSREICHEND ABGESCHIRMT BESCHLEUNIGUNSSPANNUNG KLEINER ALS 20 KV 75 OHM LOOP THROUGH COMPENSATED ELECTRICAL SHOCK THE POWER CORD PROTECTIVE GROUNDING CONDUCTOR MUST BE CONNECTED TO EARTH GROUND 1760 Series rear panel Eight loopthrough inputs may eliminate need for a separate routing switcher bus Environmental Temperature Nonoperating 55 C to 75 C Operating 0 C to 50 C Altitude Nonoperating To 15 km 50 000 ft Operating To 2 000 m 6 500 ft Vibration Meets the sine vibration test condition requirements for environmental class 3 of military specification MIL T 28800D Shock Nonoperating 50 g 1 2 sine 11 ms duration 3 shocks surface Transportation Qualified under NSTC test procedure 1A category II 24
10. in drop Humidity Will operate at 95 relative humidity for up to 5 days Do not operate with visible moisture on the circuit boards Certifications EMC Certified to the EMC Directive 89 336 EEC Safety Approved to UL1244 CSA231 Complies with EN61010 1 IEC61010 1 Physical Characteristics Dimensions mm in Height 133 4 5 25 Width 215 9 8 5 Length 460 4 18 125 Weight kg Ib Net 3 8 8 Gross Shipping Weight We 15 7 Analog Waveform Monitors 1740A Series 1750A Series 1760 Series Ordering Information 1740A NTSC Waveform Vector Monitor 1741A PAL Waveform Vector Monitor 1745A NTSC PAL Waveform Vector Monitor 1750A NTSC Waveform Vector SCH Monitor 1751A PAL Waveform Vector SCH Monitor 1755A NTSC PAL Waveform Vector SCH Monitor 1760 NTSC Component Waveform Vector Monitor 1761 PAL Component Waveform Vector Monitor 1765 NTSC PAL Component Waveform Vector Monitor All Include User manual spare fuse and air filter To meet safety listing requirements order a cabinet or rackmount from optional accessories list Opt 74 White CRT phosphor for these models 1740A 1745A 1750A 1755A 1760 1761 1765 Opt SC SCH Color framing option for 1760 1761 1765 Optional Accessories Item Description 1700F00 Plain cabinet for half rack 1700 Series and WFM601 Series safety controlled 1700FO0A Rackmount insert for WFM700 Series half rack 1700 Series and WFM601 Series 17
11. ive feature set Each operating mode provides a full set of operating controls Picture Display Clearly labeled and within easy reach Key controls are always available with bezel buttons and knobs identified by intuitive on screen labels Composite or Component Waveform Monitoring Composite Vector Display Stereo Audio Display Time Code Phasing and Amplitude SCH and Color Framing Display Component Vector Lightning Diamond and Bowtie Tektronix Data Sheet Selection Guide Product Applications 1740A Series 1750A Series 1760 Series Composite or X X X Component Waveform Monitoring Composite Vector X X X Display Picture Display X X X Stereo Audio X X X Display Time Code X X X Phasing and Amplitude SCH and Color X Framing Display Component Vector X Lightning Diamond and Bowtie Opt SC All family members provide the following standard features Eight Video Inputs eliminate the requirement for external input selectors reducing total system cost in many applications Since all eight inputs are connected directly to the instrument signals may be paraded overlaid or displayed in comparison modes not normally available with a simple external switcher Waveform monitoring is analog for maximum waveform fidelity There is no digital processing of the displayed signal The selected input may be displayed in one or two line or one or two field sweeps on a continuous basis or iden
12. ll For example a program line or off air VITS may be set up as preset number 3 Preset number 3 could be named and later recalled to display line 19 of the selected input in 2H sweep with voltage cursors marking proper signal levels Other presets could be used to immediately access and display signals from other points in the system Different operators could quickly return to preferred monitoring setups after specialized signal checks With eight loopthrough video inputs the 1740A 1750A 1760 family is a versatile central point system monitor This capability is particularly useful in the production studio where several machines cameras and composite input output feeds are in use As a machine monitor the instrument may be operated from a central control panel with waveform vector SCH and color framing with the 1750A Series and 1760 Series with SCH audio time code and servo signals easily observed High performance Design The control system based on Motorola s rugged MC68332 32 bit microprocessor with internal co processing facilitates instrument control and timing functions Flash EPROMs simplify updating the instrument to the latest firmware configuration The 1740A 1750A 1760 family is based on completely new high performance analog video system electronics Application Specific Integrated Circuits ASICs developed by Tektronix specifically to maintain signal fidelity in a television test instrument handle internal
13. paration left right is displayed in quadrature to the level display Audio frequency 3 dB bandwidth is 200 kHz Phase match between the left and right channels is better than 1 degree at 20 kHz Input is high impedance bridging either balanced or unbalanced to allow signal monitoring of existing audio circuits This display of stereo audio is intuitive and easy to use and has gained wide acceptance in new generation Tektronix vectorscopes Longitudinal Time Code is monitored in a frame rate display to allow observation of amplitude synchronization and phase with respect to reference vertical Synchronization is confirmed by the stationary display and time code phase is easily determined by horizontal position of the time code sync word on the CRT These monitors provide multiple display modes allowing simultaneous observation of the many important parameters that make up a television signal For example vector waveform and audio may be displayed together for an indication of signal quality without operator intervention In the 1750A or 1760 with the SCH option Subcarrier Horizontal Phase and Color Framing are displayed graphically in the patented Tektronix polar SCH display Sync jitter over the field is displayed as a moving sync vector dot or displayed as a timing error at a vertical rate to identify the relationship over the field time Correct color framing is quickly verified by the position of the single sync vector dot rel
14. tified lines of any field may be selected and displayed Multiple inputs may be displayed at the same time or multiple filters may be applied to one input for signal analysis Time and voltage cursors may be activated and positioned for reference or measurement Composite Vectorscope functions demodulate and display the color components of the NTSC or PAL signal A microprocessor controlled phase shifter provides accurate vector positioning and eliminates readjustment when switching between internal and external reference modes Phase and amplitude cursors with on screen readout allow system setup to reproduce specific chroma values and specific colors when luminance is similarly set using the waveform display voltage cursors A Picture Monitor mode is provided for easy signal identification This is particularly useful when the instrument is used to monitor many sources as 2 www tektronix com in a production suite or outside production vehicle In waveform or vector line select mode a line bright up marker in the picture display identifies the selected line Stereo Audio Amplitude and Phase are monitored using a calibrated L R Lissajous display The operator can quickly see that the program audio will be properly reproduced on both monaural and stereo receivers Correct phasing between two audio channels is quickly verified by the direction of the display signal level left right is confirmed relative to the CRT graticule and stereo se
15. tive Accuracy Typically within 2 Acquisition Time lt 1 s Stable Display With displayed video to external reference timing from 2 us to 1 us Display Range 70 internal reference 360 external reference Component Vector Mode 1760 Series Vertical Bandwidth 3 dB at 21 0 MHz Horizontal to Vertical Bandwidth Matching No eye opening at 500 kHz or 2 MHz Display to Graticule Registration lt 0 25 box Component Lightning Mode 1760 Series Y Displayed vertically P b Displayed horizontally on top half of display P r Displayed horizontally on bottom half of display Component Diamond Mode 1760 Series B G Displayed vertically vs B G horizontally on top half of display R G Displayed vertically vs R G horizontally on bottom half of display Component Bowtie Mode 1760 Series Common Mode Rejection Ratio 234 dB at 3 MHz Y P b CH1 CH2 Displayed on left half of display Y P r CH1 CH3 Displayed on right half of display Component Transcoded GBR Outputs 1760 Series Input Format GBR SMPTE MII or Betacam menu selected GBR Output Impedance Nominally 75 Q DC Level Back porch clamped to 0 V Gain Accuracy Unity 3 www tektronix com 5 Data Sheet Signals may be displayed in combination modes Audio Mode Full Scale 0 4 8 and 12 dBm menu selectable Full Scale Accuracy 0 5 dB at 1 kHz Maximum Input Voltage 8 V Bandwidt
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