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Wiltron 610C Instruction Manual

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MODEL
610C SWEEP GENERATOR
MANUAL
INSTRUCTION
WILTRON'
825
EAST MIDDLEFIELD ROAD
MOUNTAIN VIEW,
CA 94033
TELEPHONE: (415) 969-6500
TWX:
Copyright WILTRON CO.
1974

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  • Page 1 MODEL 610C SWEEP GENERATOR MANUAL INSTRUCTION WILTRON' EAST MIDDLEFIELD ROAD MOUNTAIN VIEW, CA 94033 TELEPHONE: (415) 969-6500 TWX: Copyright WILTRON CO. 1974...
  • Page 2 Our obligation covers repairing o r replacing products which prove to be defective during the warranty period and which shall be returned with trznsportation charges prepaid t o WILTRON. Obligation is limited t o the original purchaser. We a r e not liable for consequential damages.

  • Page 3: Installation Instructions

    Loosely attach the Birdie Mixer Assembly (Item 19) on the r e a r panel of the 610C with s c r e w s (Item 23) and w a s h e r s (Items 24 and 25) using the mounting holes provided.
  • Page 5 610C Option 11 is installed i n the Option panel o n the f r o n t of the Model 610C. The frequency of e a c h m a r k e r is adjusted by m e a n s of a 10- turn pot \i;ith a c o u n t e r knob.

  • Page 7: Table Of Contents

    Table of Contents Model 610C T A B L E O F C O N T E N T S Section Page ..... .
  • Page 8 I L L U S T R A T I O N S Page F i g u r e Model 610C Sweep G e n e r a t o r Power Level vs F r e q u e n c y Coverage .
  • Page 9 L i s t of Tables Model 610C L I S T O F T A B L E S Page Table ....... .

  • Page 10: Frequency Range

    Section I Model 610C F i g u r e 1- 1 Model 610C Sweep G e n e r a t o r T a b l e 1- Specifications FREQUENCY RANGE ( d e t e r m i n e d by R F Plug- In)

  • Page 11: Igeneralinformation

    WILTRON Model 610C Sweep The Main F r a m e of the Model 610C used Generator. A g e n e r a l description of the...
  • Page 12 Section I Model 610C and t o 4. OGHz f o r the F i g u r e 1 - 3 shows the option added when t h i s option is in- plate that R e s i d e s being a l l s t a l l e d .

  • Page 13: Option2C

    This option i s shown in Figure 1-5. on the front panel and provide convenience when installing the Model 610C in a par- Option 4 provides a g r e a t assistance if ticular system configuration. Option 7 is your work involves repetitive testing over a few particular frequency ranges.

  • Page 14: Equipment Dimensions

    ON. Option 10 provides the necess- In externally from the Main F r a m e f o r a r y control signals t o make the Model 610C troubleshooting purposes, the optional...
  • Page 15 Purity Frequency Range Model Sw oeps x. kHz peak Output Or Any (Note Bl 22 b l o w Mods Plug-In Raoga 40 dB 30 dB 110 MHz 30 dB 60 dB 30 dB 4.0 GHz 50 dB 30 dB 4.3 GHz 50 dB 30 dB...

  • Page 17: 2- 1. Introduction

    , be certain t o u s e only a 1. OA, slo- blo type t o e n s u r e proper protection. s t a l l the Model 610C Sweep Generator. Each front and r e a r panel control, connector, and This instrument does not r e q u i r e forced a i r indicator i s then identified and fully described.

  • Page 18: F R O N T P A N E L Controls. Connectors. And Indicators

    Model 610C Section I1 F i g u r e F r o n t P a n e l Controls, Connectors, and Indicators F i g u r e R e a r Panel Controls and Connectors 2- 2...
  • Page 19 Model 61OC Sweep Genera- with the Model 610C Sweep Generator t o tor. provide a specific band of frequency out- put.

  • Page 20: Sweep Mode

    Model 610C Section I1 select the period of time for the frequency pulse during R F P I P and VIDEO operation, respectively, and the intensity of the spot t o sweep from Four overlapping ranges a r e selectable: during INTENSITY operation.

  • Page 21: R E A R Panelcontrolsandconnectors

    (Options through 10). See which m a y be used t o blank the oscillo- paragraph 1-4 for a description of each. level for a WILTRON Model 501 Logarith- m i c Level Meter. 2-6. HOW TO PLOT FREQUENCY RE-...

  • Page 22: Variations

    Section I1 Model 610C 1. Select an appropriate R F Plug-In in the 11. Connect a suitable cable between the R F OUTPUT connector, located on the desired frequency range of the t e s t t o R F Plug-In, and the input to the device be made.
  • Page 23 Model 610C Section I1 2. Set the front panel controls a s indica- Should it be desired to manually tune the frequency response of a device, proceed ted: a s follows: INTENSITY AMPLITUDE Fully CCW 1. Make the necessary connections and .

  • Page 24: Remote Frequency Control And Programming

    TRIG. 2-8. REMOTE FREQUENCY CONTROL AND PROGRAMMING The Model 610C Sweep Generator has pro- visions, via the r e a r panel terminal s t r i p quency programming. One method provides for remote frequency control. This enables...

  • Page 25: How To Remotely Programf O And Af

    Model 610C Section I1 T e r m i n a l Aprovides a voltage source (+11.2V T o calculate the value of Rl, multiply the total resistance of the network (10,000 potentiometer or r e s i s t i v e divider. Terminal ohms) by the value calculated for F.
  • Page 26 R F Plug- In frequency band. The indicated resistance shown in Figure 2-5 must be observed for optimum results. The WILTRON factory installed option (Op- tion 4) can be used to provide three select- able center frequencies (Fo) and a corre-...

  • Page 27: Introduction

    The Sweep Generator assembly (6 1OC- ML- mation regarding the circuit operation of 835) contains the basic circuit elements of those assemblies that comprise the Model the Model 610C Sweep Generator. Refer t o 610C Sweep Generator. Included a r e sepa- Figure 6- 1 during the following discussion.

  • Page 28: Sweep Time

    Section 111 Model 610C leveling and R F Plug-In control. The r a m p output of the amplifier is attenuated and proximately seven t i m e s that of iTis coup- voltage offset by the r e s i s t i v e divider net- led through R 116.

  • Page 29: Sweep Waveforms In The Auto Mode

    Section Model 610C L H L L A M P Figure 3-2 Sweep Waveforms in the AUTO Mode prevents the output of Q107 from reaching Here they a r e summed with the output of The Trigger the lower hysterysis level.

  • Page 30: Frequency Instruction

    SWEEP MODE switch, provides a linear r a m p of voltage a s it Birdie Markers assembly (610C-ML- 834) adjusted. This r a m p simulates the r a m p...

  • Page 31: Blanking Waveforms

    Section Model 610C coupled through the SWEEP MODE ewitch The sweep output, generated by the Sweep t o the input of the clamp circuit. Here it Generator assembly (610C- ML-835 Figure 3- 4 Blanking Waveforms...
  • Page 32 Section Model 610C i s clamped between two stable reference TO F2 mode, is shown in Figure 3-6. voltages s o that the levels t r a v e r s e d by As c a n be s e e n from Figure 3- 6A, the out- the sweep can accurately be established.

  • Page 33: Vector Summing Diagrams

    Model 610C AT / W D / o FULL SWEEP Figure 3-6 Vector Summing Diagrams The sweep output from the Sweep Generator wipers of F1 and F2 a r e connected to the assembly is coupled through SlOl and R205...
  • Page 34 Section I11 Model 610C alaodirectly coupled to the input of the varia- ble frequency m a r k e r circuit. See Figure 6-3. When set f o r A F operation, the output from clamp circuit coupled t o the divider network of R210 and R241.

  • Page 35: Variable And Birdie Markers

    Model 610C Section I11 potentiometer connected between t e r m i - blanked a t the s e l e c t e d frequency. With the n a l s A and D of TB20 1 and the wiper t o...
  • Page 36 Section 111 Model 610C m a r k e r frequency voltage, This voltage amplifier Q305 which i s followed by a dif- ferential amplifier Q306 swept output voltage causes es t o c r o s s zero, the current i n the differential ampli- fier makes a linear transition from Q306 to Q307.

  • Page 37: Level And High Voltage Regulators

    Model 610C Section I11 The spacing between the peaks is l2kHz . b i a s period, the diode continues t o conduct a s the s t o r e d charge is swept out. This with the Narrow tuned circuit selected and...
  • Page 38 Section 111 Model 610C voltage E o is used to drive the voltage con- assembly (610C-ML-836) consists of the Level Regulator Amplifier and Limit Sen- trolled attenuator in the R F Plug-In. This s o r circuits that form p a r t of the automa-...
  • Page 39 Sweep Gen- output, the amplifier will be forced to e r a t o r a s s e m b l y (610C-ML-835). See Fig- i t s negative l i m i t (approximately u r e 6- 1.

  • Page 40: Power Supplies

    Rectifier (610C-ML-838) and the Power 3- 13. The output voltage of either supply Supply (610C-ML- 837). Refer t o Figure 6-5 i s sampled by a resistive voltage divider during the following discussion. R 1 / ~ 2 and is compared against a stable reference voltage er.
  • Page 41 Regulator which f o r m s a part of the Level R503 proportional to the amount of c u r r e n t and High Voltage Regulator assembly (610C- being drawn. This drop cannot exceed the This out- drop a c r o s s R504 due t o the control of Q502.

  • Page 42: Frequency Control

    The linear r a m p output from the Frequency circuit. Frequency compensation i s pro- Instruction assembly (610C-ML- 833) vided by C515 and R.541. coupled t o one input of a differential stage comprised of Q801 through Q804. The out- The +5.6Vdc supply i s referenced from...
  • Page 43 Model 610C Section f o r R817 A thru J is factory selected f o r of the varactor. T h e different b i a s volt- a g e s f o r the shaping diodes s e t the fre-...

  • Page 44: R F Signal Generator

    Model 610C Section IV Table 4- 1 L i s t of Required T e s t Equipment Input Impedance: g r e a t e r than 5 megohms Resolution: g r e a t e r than 1mV...

  • Page 45: Maintenance

    PER FOR MANCE VERIFICATION/ The following s t e p s a r e used t o initialize R ECA LIBR A TION the Model 610C Sweep Generator for per- formance verification, recalibration, o r The following paragraphs have been pre- troubleshooting.

  • Page 46: Model 610C Sweep Generator. Bottom View

    Model 610C (Option Harmonic R F Plug- In Marker Generator Power Supply Regulators Sweep Generator Level and H. V. Regulators Frequency Instruction Rectifier Var and Birdie Markers 6 10C- ML- 83 8 Figure 4- 1 Model 610C Sweep Generator, Bottom View...
  • Page 47 VER TF'ICA TION/ RECALIBRA TION 3. Monitor pin 9 of 610C- M L - 837 and v e r - T h e following outlines t h o s e s t e p s r e q u i r e d ify that t h e voltage i s -5.
  • Page 48 0 t o the Trigger Adj potentiometer R138 on a decreasing voltage i s observed, adjust 610C-ML-838 a s follows: the Sweep Bias Adj potentiometer R126. a ) Set the following controls a s indicated: 10.
  • Page 49 4-2.4 FREQUENCY INSTRUCTION 24. With the SWEEP MODE switch set to TRIG and pin 2 of 610C-ML-835 being monitored, observe a normal sweep. The following outlines the steps required If no sweep i s observed, adjust the...

  • Page 50: Slide Rule Dial Calibration Marks

    If the c u r l s a r e not equal, adjust the Sweep End Level potenti- o m e t e r R 131 on 610C-ML- 835. 15. Using the F1, VAR FREQ MKR, and F2 control knobs, align t h e i r r e s p e c - 11.

  • Page 51: Model 610C Sweep Generator. Top View

    22. Connect the v e r t i c a l input of the Oscil- a t CW MKR and a r e within k25mV of the voltage a t CW Fl. If the CW MKR potentiometer F 2 CAL potentiometer Figure 4-5 Model 610C Sweep Generator, Top View...
  • Page 52 Section IV Model 610C 4-2.5 LEVEL AND HIGH VOLTAGE REG- 23. Set the vertical sensitivity t o 5mV/cm and the horizontal time base t o lOms/ IBRATION 24. Observe that the ripple voltage does not 1. Set RETRACE R F switch to ON. Set exceed lOmV peak-to-peak.

  • Page 53: Sweep Dwell Waveform

    5. Set the following front panel controls a s indicated Connect a suitable R F Detector, such a s a WILTRON Model 73N50, to the R F Slide Rule Dial division OUTPUT connector, located on the R F FAR FREQ MKR 6th from l a s t minor Plug- In.

  • Page 54: R F Pip Marker Pulse

    Model 610C Section IV port and the input t o the Electronic Counter. HARMONIC M A R K E R switch S901 t o lMHz and verify that the frequency is lMHz f 100Hz. If out of tolerance, adjust the recalibration capacitor C901.

  • Page 55: Troubleshooting

    If out a malfunction is evident. The simplified of tolerance, adjust the recalibration S W E E P CLAMP GENERA TOR PLUG-W F i g u r e 4- Model 610C Simplified Signal Flow Diagram...
  • Page 56 Chart. No horizontal sweep. Check control settings. See para- graph 4-2.1 step 7. Check for sweep a t pin 2 of 610C ML- 835. 1. If good, s e e Frequency Instruc- tion Troubleshooting Chart. If bad, s e e Sweep Generator Troubleshooting Chart.
  • Page 57 Section Model 610C MODEL 610C GENERAL TROUBLESHOOTING CHART Continued INDICATION POSSIBLE CAUSE AND REMEDY 2. If bad, s e e Frequency Instruction and Sweep Generator Trouble- shooting Charts. NARROW m a r k e r s a r e poorly Set SWEEP TIME (SEC) switch t o shaped, but WIDE m a r k e r s a r e ok.

  • Page 58: Power Supply

    Model 610C Section IV POWER SUPPLY TROUBLESHOOTING CHART Continued POSSIBLE CAUSE AND REMEDY INDICATION Check Q502, Q503, Q504, and +30 V supply cannot be adjusted, but + l l . 2V supply i s ok. Check CR501, CR502, CR503, and CR504 for an open circuit.
  • Page 59 Sweep too slow o r SWEEP TIME Check that R F P l u g - I n i ~ properly installed. effect on Sweep Time. Check -18V at pin 4 of 610C-ML-834. Sweep Time too slow/fast on all ranges. Check SWEEP BIAS ADJ R126 setting.
  • Page 60 BEGIN ADJ R206 cannot adjust Check output of Sweep Generator s t a r t level for O V a t pin 2 of 610C-ML-835 for pro- terminal I of TB201. per sweep s t a r t level. See para- graph 4-2.3.
  • Page 61 Model 610C Section IV FREQUENCY INSTRUCTION TROUBLESHOOTING CHART Continued INDICATION POSSIBLE CAUSE AND REMEDY A F O F F S E T R225 cannot adjust Check for -20V on pin 10 of voltage f o r O V f 2 5 m V a t pin 24 610C-ML-833.

  • Page 63: Ordering Replaceable Parts

    . We will endeavor t o provide you WILTRON p a r t number f o r e a c h i t e m used i n the manufacture of the unit.
  • Page 64 Section V Model 610C Table RESISTORS 101-36k-5 R142 REF. WXLTRON R143 5% CC 101-39k-5 DES. PART NO. R144 pot. /on SlOl 410-67 101-27k-5 R145 R146 103-180-10 R102 R103 101-56k-5 R147 R104 potentiometer 141-10k R105 R148 R149 101-10k-5 R150 141-10k R151...

  • Page 65: O P T I O N 4

    Section Model 610C Table (Continued) RESISTORS 101-100-5 R309 WILTRON R E F . 101-2k-5 P A R T NO. not ueed 101-47k-5 124k 1/8W.250/0 M F R216 not used R313 R217 151- 2k potentiometer not ueed R218 R314 not used...

  • Page 66: O P T I O N 3

    Section V Model 610C Table 5- 2 (Continued) RESISTORS REF. WILTRON R442 101-15k-5 DES. P A R T R443 R444 R402 potentiometer R445 153-10k not used R446 R403 101-39k-5 R404 22 k R447 R405 not used R448 R406 101-68k-5 101-100k-5...
  • Page 67 Model 610C Section V T a b l e 5-2 RESISTORS (Continued) T a b l e 5 - 3 CAPACITORS R E F . I LTl3 ON WILTRON DES. DES. P A R T NO. P A R T NO.
  • Page 68 Section V Model 610C T a b l e 5- 3 CAPACITORS (Continued) = C e r a m i c E = E l e c t r o l y t i c WILTRON M i = Mica DESCRIPTION ( 2 ) DES.
  • Page 69 Section V Model 610C Table (Continued) 5- 4 TRANSISTORS 10-FD300 10- IN4446 WILTRON REF. DESCRIPTION 10- IN4446 P A R T NO. DES. 10- lN4446 not u s e d Q310 20- TD400 10- IN4446 Q401 not u s e d...
  • Page 70 Section V Model 610C Table 5-5 DIODES (Continued) Table 5-7 CONNECTORS REF. WILTRON REF. WILTRON DESCRIPTION DESCRIPTION DES. DES. PART NO. 10- IN4446 BNC female 510-5 10- IN823 (TRIGGER INPUT) not u s e d 10- IN4446 5102 BNC female...

  • Page 71: D E O M A R K E R P U L S E

    Model 610C Section V Table 5-9. Harmonic M a r k e r G e n e r a t o r (Option I), P a r t s L i s t DESCRIPTION RESISTORS CC = Carbon Composition CAPACITORS ( 2 )
  • Page 72 Section V Model 610C CAPACITORS (cont) MISCELLANEOUS WILTRON R E F . 510-3 DESCRIPTION DES. PART NO. Connector, BNC 410- 35 Switch, rotary, 5-position 630-7 C962 Crystal, lMHz 220-33 630- 6 C963 500V 1070 Mi Y902 Crystal, lOMHz 230-15 Y951...
  • Page 73 Model 610C Section V Table 5-10. Birdie M a r k e r s (Option 3). T a b l e 5- 11. Remote Frequency P r o g r a m m i n g P a r t s L i s t (Option 4), P a r t s L i s t REF.
  • Page 74 S e c t i o n F r e q u e n c y R e f e r e n c e Voltage, T a b l e 5- 12. Parts L i s t W I L T R O N C A P A C I T O R S P A R T NO.
  • Page 75 T h i s s e c t i o n of the m a n u a l contains t h e s c h e m a t i c d i a g r a m s f o r t h e Model 610C Sweep G e n e r a t o r .

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