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Содержание 067-1011-00

Страница 1: ...n 97077 070 3679 00 Product Group 20 1 ktron00 COMMITTED TO EXCELLENCE PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL 067 1 011 00 DIGITAL SWEEP GENERATOR INSTRUCTION MANUAL Serial Num...

Страница 2: ...of Tektronix Inc Products of Tektronix Inc and its subsidiaries are covered by U S and foreign patents and or pending patents TEKTRONIX TEK SCOPE MOBILE and are registered trademarks of Tektronix Inc...

Страница 3: ...Functions of Controls Connectors and Indicators APPLICATIONS Jumper Options Frequency Response Testing Digitally Locking the DSG to the 1900 Digital TRS Genlocking the 1900 to the DSG Blackburst Blank...

Страница 4: ...erator Sweep Control Manual Frequency Control Cosine Generator Output Reset Off Operation PART 2 THE SWITCHING POWER SUPPLY General 5V Supply 5 2V Supply CALIBRATION Introduction General Instructions...

Страница 5: ...ES Control Setting Fuses Static Sensitive Components Test Equipment Circuit Isolation Voltages and Waveforms Component Checking Transistors and Integrated Circuits IC Resistors Crystal Oven 5 1 5 1 5...

Страница 6: ...tor In the power cord Is essential for safe operation iv Grounding the Product This product is grounded through the grounding conduc tor of the power cord To avoid electrical shock plug the power cord...

Страница 7: ...rous voltages exist at several points in this product To avoid perso nal injury do not touch exposed connec tions and components while power is on v Disconnect power before removing protective panels...

Страница 8: ...067 1011 00 DSG 1 1 Digital Sweep Generator vi...

Страница 9: ...generators waveform monitors and other television equipment See Fig 2 11 The Digital Sweep Generator provides 10 bit 14 31818 MHz Mega samples per second word data derived from a cosine lookup table s...

Страница 10: ...in Fig 1 1 The front panel includes a green LED power indicator two 25 pin D type Digital Data connectors three bnc connectors for blanking markers and blackburst output and one switched variable freq...

Страница 11: ...rforming verification tests Characteristics DIGITAL DATA OUTPUT Frequency Range Format Sample Clock Frequency Voltage Levels Driver Impedance Dynamic Range Table 1 1 ELECTRICAL CHARACTERISTICS Perform...

Страница 12: ...S Performance Requirement Jumper selectable Line 261 Field 2 Through Line 21 Field 1 And Line 262 Field 1 Through Line 20 Field 2 10 8 microseconds 1 4 Supplemental Information SMPTE Standard Proposed...

Страница 13: ...v 3 579545 MHz 1 v 4 026988 MHz 0 5 v 4 418501 MHz 1 v 4 977805 MHz 1 v 5 984552 MHz 1 5 Supplemental Information Marker Frequencies are multiples of 55 93 kHz Amplitude within 10 A utility signal fo...

Страница 14: ...2 ENVIRONMENTAL CHARACTERISTICS Supplemental Information 0 degrees C to 50 degrees C 40 degrees C to 65 degrees C To 4 572 m 15 000 feet To 15 240 m 50 000 feet Table 1 3 PHYSICAL CHARACTERISTICS Inf...

Страница 15: ...cks of the power module in the selected compartments If the barriers do not match the cutouts n the DSG circuit board edge connector they may indicate special rear interface connections for another ty...

Страница 16: ...Digital Sweep Generator to an outside source Button switch to cause the Digital Sweep Generator to INTernally produce the 14 31818 MHz clock signal when not using the DIGITAL CLOCK INPUT Setting the b...

Страница 17: ...tput via a BNC connector to allow an outside source to genlock to the Digital Sweep Generator This signal conforms to the RS170A EIA Video Standard in format only It is intended to be used as a utilit...

Страница 18: ...g provided by the 1900 Digital Output The Digital Sweep Generator provides digital data for the 1900 Digital Input To use the External Clock from the 1900 to drive the DSG the 1900 must be configured...

Страница 19: ...ystem D Tektronix 7603 i 7A13 7A26 7853A 3679 02 2 1 Calibrating the 1900 frequency response Tektronix 1900 Digital Generator Tektronix 175 3671 00 Interconnecting Cables Device Under Test Detector He...

Страница 20: ...re monitor in evaluation of resolution the output should be locked to horizontal Locking to horizontal creates a phase discontinuity on the output sinewaves however since the sinewave frequency is not...

Страница 21: ...DSG 3679 04 2 3 A composite video frequency sweep with sync and burst being inserted by the 1900 displayed on a picture monitor 3679 05 2 4 Frequency sweep with sinewave H Reset ON viewed on picture...

Страница 22: ...DAC output 2 7 Spectrum of DAC output with sinewave H Reset ON single frequency output 3679 06 3679 08 2 8 2 6 Frequency incrementation with sinewave H Reset OFF at DAC output 2 8 Spectrum of DAC outp...

Страница 23: ...his provides 1024 possible levels of output from a digital to analog converter Every analog sample point is rounded to the nearest discrete level Therefore every analog sample may have an error of up...

Страница 24: ...2 9 Detector output with sinewave H Reset ON 067 1011 00 DSG 3679 10 2 10 Detector output with sinewave H Reset OFF 3679 12 2 11 Use of the marker output 2 10 3679 11...

Страница 25: ...path for attaining NBS traceability is illustrated in Fig 2 12 A digital voltmeter and the 067 0916 00 Video Amplitude Calibration Fixture are transfer standards to allow accurate and traceable low f...

Страница 26: ...Amplitude Calibration Fixture Other Television Teat and Measurement Equipment 067 1011 00 DSG 015 0408 00 Peak to Peak Detector System 1485 Mod W5F Waveform Monitor 1900 Digital Generator 067 1011 00...

Страница 27: ...the sweep frequency and sinewave output Blackburst is generated by a sync generator integrated circuit The sweep control generates addresses to step through the cosine lookup table in the cosine gener...

Страница 28: ...block diagram H LOCK IN OUT ADDER FIELD RESET FROM V PROM H RESET FROM H PROM LATCH TO MANUAL FREQ CONT SYNC GEN 4 FREGUEN FRAME RESET CONTROL FROM TIMING BLOCK OUTPUT STAGE IOBIT DIGITAL DATA OUTPUT...

Страница 29: ...eriods of low between the reference highs starting each word All other words have a maximum potential of eight lows per word 0972 and 0874A form a nine bit shift register where all nine registers are...

Страница 30: ...___ WORD 0 ______ y WORD O 10 bits WORD 1 9 bits i WORD 2 9 bits T _______ I X X X X X X X I X X X X X X X I BIT I o I 1 I 2 I a I 4 I s I I 1 I e I 9 I o I 1 I 2 I a I 4 I s I I 1 I e I o I 1 I 2 I a...

Страница 31: ...th line 1 vertically and about two thirds of the way across where burst would be Note If there were a problem with the BLACKBURST Out signal of the 067 1011 00 the Blackhurst Out of the 1900 can serve...

Страница 32: ...atus 70 ns Long TRS U960 Pin 9 U874 Pin 8 3679 17 3 4 Actual waveforms from TRS sync strip circuit Mill Frame Status 70 ns Long TRS U874B Pin 8 U473 Pin 8 3679 18 3 5 Same as figure 3 4 with U473 8 sh...

Страница 33: ...U886A Pin 5 FR1 U849 Pin 15 FR1L _ FR2 1 70ns _ ______________ U862 Pin 6 FR3 U849 Pin 16 RESETH U849 Pin 19 FR4 U862 Pin 3 RESET V 140n LU849 Pin 12 3679 19 3 6 Detailed illustration of color framin...

Страница 34: ...RE MONITOR 1485 or equivalent A u EXT INPUT EXTERNAL SYNC PROBE SYNC INPUT PIX MONITOR VIDEO OUT IN j 3 7 Viewing V or H Reset pulse with picture monitor H Reset V Reset v v 14 MHz LD EN CLK U334 CA O...

Страница 35: ...PROMs creates the blanking signal the Markers and the actual digital data The sweep PROMs U416 and U427 determine the sweep output frequency on each line of the field The VERT PROM U438 produces the...

Страница 36: ...circuit increases the periods of cosinewaves are run through faster and faster since less samples are read out each time and herefore higher frequencies result Every two lines the number at the input...

Страница 37: ...urrent sense and voltage sense with the ramp output of the internal ramp pulse generator and when the ramp voltage exceeds the sum of the feedback control voltages the comparator output turns off the...

Страница 38: ...U11 L J 30V Unreg Voltage Sense Current Sense 3 9 5 volt simplified diagram sv Reference U11 4 75K 15 4K Voltage Sense SG3524 U16 30V Unreg r I I I I I L PWM I I I I I I t _____ J Current Sense L57 0...

Страница 39: ...through the current limit resistor R19 L57 and output pass transistor Q59 In doing this L57 stores energy in its flux field During the off time of the output transistors the current flows out of L57 t...

Страница 40: ......

Страница 41: ...stment Procedure following the Performance Check in this section is very brief The only adjustment in the Generator is for the crystal oscillator frequency Names of front panel controls connectors and...

Страница 42: ...greater than 40V with accuracy of 0 1 Digital to Analog 10 bit 14 MHz sample rate Converter Picture Monitor Pulse Cross mode Power Modules 2 Extender Cable 75 Ohm Low Loss Cable TM500 compatible 4 2...

Страница 43: ...ndwidth b At Pin 10 of P71 on A3 observe 5 2V DC or 5 with less than 325 mV peak to peak noise and 40 MHz ripple Limit the oscilloscope preamplifier to 20 MHz bandwidth c Connect a probe to the output...

Страница 44: ...int illustrated in Fig 4 2 Check for a clock frequency of 14 31818 MHz or 100 Hz NOTE An alternative way to check the internal clock frequency is to genlock a video test signal generator using the BLA...

Страница 45: ...en c Adjustment of Cover Selectable C788 Board I I 4 1 Crystal oscillator frequency adjustment location Back Side of Board 0 CLOCK Switch 0 0 0 SINEWAVE H RESET Switch Connect Probe Here 4 2 Oscillato...

Страница 46: ...rd with the dimensions listed in Table 4 2 Characteristic NOTE The BLACKBURST OUTPUT is intended as a utility synchronizing signal not as a precision standard for reference Table 4 2 BLACKBURST OUT DI...

Страница 47: ...ble 4 3 TABLE 4 3 7D01 HOOKUP ARRANGEMENT DIGITAL DATA OUTPUT 25 pin D Type Connector 7D01 Input Probes Connector Pin Number Microclip Number 12 C CLK signal gray wire 10 0 LSB black wire 9 1 brown wi...

Страница 48: ...urce W R Mode External Qualifier Filter Control Probe Qualifier Threshold Voltage L low position Ext in detent 0 15 254 bits ch Pre Trigger Post Trigger W R word recognition Synchronous Hi Minimum Lo...

Страница 49: ...necessary to look at half of the data words in the Pre Trigger mode and the other half in the Post Trigger mode Use the Reset button each time to record the data from the Digital Sweep Generator into...

Страница 50: ...134 20F 2E5 310 266 178 OF3 139 216 2E9 300 260 172 OF2 130 210 2EO 308 259 16C OF1 142 223 2F1 308 253 167 OF1 147 22A 2F5 305 24C 161 OFO 14C 231 2F8 302 245 15C OFO 151 238 2FC 2FF 23F 156 OFO 156...

Страница 51: ...f A3 Digital Sweep Generator board ADJUSTMENT PROCEDURE Step 1 Preparation Connect the Digital Sweep Generator to a host TM500 Power Module via the optional accessory flexible extender cable Allow 20...

Страница 52: ......

Страница 53: ...ene chloride sulphuric acid or Freon compounds for cleaning the DSG Use only clean water and a mild detergent Exterior Loose dust may be removed with a soft cloth or dry brush Water and a mild deterge...

Страница 54: ...nent The first page of the Diagram section defines the circuit symbols and reference designators used in the manual Important waveforms and voltages are shown within the diagrams Circuit Board Illustr...

Страница 55: ...tive Components Static discharge can damage any semiconductor component in this instrument This instrument contains electrical components that are susceptible to damage from static discharge See Table...

Страница 56: ...the body never by the leads 7 Do not slide the components over any surface TABLE 5 1 RELATIVE SUSCEPTIBILITY TO STATIC DISCHARGE DAMAGE Semiconductor Classes Relative Susceptibility Levels Microcircu...

Страница 57: ...BLACKBURST OUTPUT The blackburst generator and digital swe p generation circuits both depend on timing information from the horizontal and vertical countdown so depending on the combination of blackb...

Страница 58: ...nductors should be of the original type or a direct replacement Figure 5 1 shows the lead configuration of the semiconductors used in this instrument system Resistors Check resistors with an ohmmeter...

Страница 59: ...1 00 DSG c c C E c E B B 8 E E 8 Gnd IN OUT Metal Cased Transistors L Negative Voltage Regulator _J c E c E c E 8 8 8 _____________ Plastic Cased Transistors 3679 26 5 1 Non typical semiconductor pino...

Страница 60: ...l Parts Some parts are manufactured or selected by Tektronix Inc to satisfy particular requirements or are manufactured for Tektronix Inc to our specifications Most of the mechanical parts used in thi...

Страница 61: ...067 1011 00 DSG SECTION 6 OPTIONS There are no options to the 067 1011 00 Digital Sweep Generator 6 1...

Страница 62: ......

Страница 63: ...4 A23 R1234 Read Resistor 1234 of Assembly 23 Example b component number A23A2R1234 A23 A R1234 Assembly Subassembly L__number Circuit number Read Resistor 1234 of Subassembly 2 of Assembly 23 Only th...

Страница 64: ...E F CO TRW ELECTRONIC COMPONENTS IRC FIXED RESISTORS PHILADELPHIA DIVISION CTS KNIGHTS INC LITTELFUSE INC TEKTRONIX INC DALE ELECTRONICS INC Address 200 PARK AVENUE 54TH FLOOR P 0 BOX 128 1201 2ND ST...

Страница 65: ...DI O OlUF 10 lOOV 04222 GC70 1C103K AlC779 283 0639 00 CAP FXD MICA D 56PF 1 100V 00853 Dl51E560FO AlC783 283 0779 00 CAP FXD MICA D 27PF 2 500V 00853 D155E270GO A1C788 283 0636 00 CAP FXD MICA D 36PF...

Страница 66: ...OHM 20 0 125W 91637 MSP10A01 511G A1R942 315 0103 00 RES FXD CMPSN lOK OHM 5 0 25W 01121 CB1035 AlR943 307 0503 00 RES NTWK THK FI 9 510 OHM 20 0 125W 91637 MSP10A01 511G AlR967 315 0103 00 RES FXD C...

Страница 67: ...63 00 AlU723 156 0788 01 MICROCIRCUIT DI SYN 4 BIT CNTR W SYN CLEAR 01295 SN74LS162 AlU732 160 1064 00 MICROCIRCUIT DI 256 X 4 PROM PROGRAMMED 80009 160 1064 00 AlU755 160 1065 00 MICROCIRCUIT DI 256...

Страница 68: ...0F 20ROOJ A2R3020 321 0289 00 RES FXD FILM lOK OHM 1 0 125W 91637 MFF1816Gl0001F A2R3022 321 0279 00 RES FXD FILM 7 87K OHM 1 0 125W 91637 MFF1816G78700F A2R3100 321 0271 00 RES FXD FILM 6 49K OHM 1 0...

Страница 69: ...OR SILICON NPN 80009 151 0621 01 A3Rl2 321 0262 00 RES FXD FILM 5 23K OHM 1 0 125W 91637 MFF1816G52300F A3R13 321 0258 00 RES FXD FILM 4 75K OHM 1 0 125W 91637 MFF1816G47500F A3Rl6 321 0258 00 RES FXD...

Страница 70: ...omponent No Part No Eff Dscont Name Description Code Mfr Part Number CHASSIS PARTS DS85 150 1055 00 LT EMITTING DIO GREEN 560NM 40MA 72619 559 0201 001 R80 311 1310 00 RES VAR NONWIR 20K OHM 20 lW 011...

Страница 71: ...he title for the circuit board component location illustration and in the lookup table for the schematic diagram and corresponding component locator illustration The Replaceable Electrical Parts list...

Страница 72: ......

Страница 73: ...G I EXTERNAL LOCK BLACK BURST GENERATOR I I SV POWER SUPPLY 5 2V 12 v 067 1011 00 MANUAL FREQUENCY CONTROL 11r SWcE P C051NE CONTROL GENERATOR 679 Z 6 OUTPUT STAGE 10 BIT DIGITAL DATA OUTPUT MARKERS B...

Страница 74: ...8 Z AZ Oven Board 8 1 A1 Digital Sweep Generator Board Waveforms for ov ov ov filll CR 175 F lfiln t CR111 R1 l 0386 pU497 U27J I p UJ74 I pU47J p UJ6J p UJ51 ov ov ov p U874 ov ov ov p U984 p U97J iR...

Страница 75: ...r h I i r U245 IJ445 I I RJ41 I D 1 _1 I I h U3J4 p I p I _t_____J USJJ U6J2 1 C22J p U427 I I l JS26 c c 2 c221 iR412f4221 I Rs22 I h U621 VR11J L__ F U 1 2 J 1 p U416 Ip U517 IL u_2_6 p UJ63 US59 U...

Страница 76: ...8746 7 4574 U559C 74 00 FR 4 FR3 _F_R_z __1_7_ 16 21 J374LS86 NI I 05 I R 792 OK JoG __ U86 o 1 4 l 14 15 FRIL A I D 1 e R 9_8_2 _ I04 o 19 100 ID 3 7 R 83 ID3 20 100 I D2 e _R_9_6_ _ ID2 IOI IOI ID 2...

Страница 77: ...74LSl3 2 4 100 3 _ I A 0 6 DLY4 II I TR S _ e _ _ ____ f6 C Ii 12 I 11 i2 v J e 4 DLY 3 i3 I c LK I l _ r J 5 DL 2 I 6t_ _ __ _ ____ _ a 3 DL YI 14 I 25 Yor 54B E lC T E R Nc A L C L 0 C K 4 3 M H Z o...

Страница 78: ...67 1011 00 DSG 0 Waveforms for Pin 10 Pin 13 Pin 1 Pin 4 Pin 12 Pin 19 Pin 5 Pin 6 ov Pin 5 Pin 10 Pin 13 Pin 6 Pin 1 Pin 9 Pin 4 Pin 2 Pin 12 Pin 9 Pin 19 Pin 5 Pin 2 Pin 6 ov ov...

Страница 79: ...067 1011 00 DSG 0 Waveforms for Pin 10 Pin 13 Pin 1 Pin 4 Pin 12 Pin 19 Pin 5 Pin 6 OV Pin 10 Pin 13 Pin 1 Pin 4 Pin 12 Pin 19 Pin 5 Pin 6 ov...

Страница 80: ...D AS LATCH 51NEWAVE RESET POLARIT NORMAL INVERTED 5V R616 IOK START MANUAL lswei p l f D sv I INEWAVE s 74 s JSS 7 H RESET 1 PULL PUSH _____ FREE RUN 1t SK I LOC KED __ 3 2 0 7 U658 9342 7 COSINE PROM...

Страница 81: ...S 162 sv _ USED AS LATC H sv i T1lw _ 2_1 __ F_1_ I R 80 i Fl li 43 NC 6 VIN 5 1 3 Z 4K I IC547 4r 4 I I 1 7 f O lf F DB 31 l S___ I LJ J548 t533 I IOK VIN 2 1_6___ 0 1 IV v 1 9 l C LK R I l 1 7 I I _...

Страница 82: ...067 1011 00 DSG Waveforms for 0 ov ov 3679 29 8 3 A3 Power Supply Board ov ov ov ov...

Страница 83: ...067 1011 00 DSG Waveforms for ov 3679 29 8 3 A3 Power Supply Board ov ov ov...

Страница 84: ...AUS RE6ULATOR 15 C43 10 G Rl I 4 75V 2 2 IN OUT Mr T I GNO 12v C34 1000 IO LIMIT 4 5 R50 5 2 3K U16 SG352 REGUL AIOR R2t 13 0K Rio 4 75K z e 2 l oc 4 LIMli 5 10 15 P 61 5100 12 13 NC D R49 IK 12 13 CO...

Страница 85: ...CUIT CRT CATHODE RAY TUBE ID INSIDE DIAMETER DEG DEGREE IDENT IDENTIFICATION DWR DRAWER IMPLR IMPELLER Section 9 067 1 This mechanical parts list is indented to indicate item relationships Following i...

Страница 86: ...IX INC CENTRAL SCREW CO N L INDUSTRIES INC SOUTHERN SCREW DIV KINGS ELECTRONICS CO INC TEXTRON INC CAMCAR DIV Address 647 INDUSTRY DRIVE P 0 BOX 3608 YOUK EXPRESSWAY P 0 BOX 2244 40 BRISTOL ST 666 E D...

Страница 87: ...IN ATTACHING PARTS SCR TPG THD FOR 2 32 X 0 312 INCH PNH STL SUPPORT FRAME REAR AL ATTACHING PARTS 2 SCR TPG THD FOR 6 32 X 0 50 INCH PNH STL 2 SUPPORT PLUG IN FR SECT PLUG IN TOP l SPRING GROUND FLA...

Страница 88: ...WSHR 4 40 X 0 312 DOUBLE SEMS 4 SPACER POST 0 25 HEX x l 125 L W 4 40 THD CKT BOARD ASSY INCLUDES 10 1 1 2 1 1 1 1 2 l TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD TRANSISTOR SEE A3Q79 REPL ATTACHING PAR...

Страница 89: ...067 1011 00 DIGITAL SWEEP GENERATOR...

Страница 90: ...75 3671 00 2 CA ASSY SP ELEC 26 28 AWG 8 0 L OOOEO OBD 2 015 0408 00 1 ACCY PKG PEAK DETECTOR 80009 015 0408 00 3 015 0413 0 0 ACCY PKG PEAK TO PEAK DETECTOR HEAD 80009 015 0413 00 4 012 0159 01 CABLE...

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