Wavetek 188 Instruction Manual
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Wavetek 188 Instruction Manual

Sweep/ function generator
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  • Page 1 Web: http: // www. pearl - hifi . com Ave. SW, Calgary, 86008, 2106 33 AB; CAN T2T 1Z6 Ph: + .1.403.244.4434 Fx: + .1.403.245.4456 E-mail: custserv @ pearl - hifi . com Inc. ❦ Perkins Electro-Acoustic Research Lab, Inc. Engineering and Intuition Serving the Soul of Music Please note that the links in the P logotype above are “live”...
  • Page 2 Verso Filler Page ♦ ♦...
  • Page 4 Verso Filler Page...
  • Page 5 4 MHz SWEEPI FUNCTION GENERATOR © WAVETEK 1 980 • THIS DOCUMENT INSTRUMENT CONTAINS INFORMATION PROPRIETARY WAVETEK AND IS SOLELY FOR OPERATION AND INFORMATION IN DOCUMENT MAY MAINTENANCE. THE THIS NOT BE DUPLICATED IN ANY WITHOUT THE PRIOR AP­ MANNER PROVAL OF WAVETEK.
  • Page 6 High voltage s o m e instruments ma y either a conjunction be dangerous if misused. Special disclaimers apply to these instruments. Wavetek assumes no consequential liability for secondary charges or damages and, in any...
  • Page 7 Scans by Artekmedia 2011 => SAFETY This wired via the facility instrument is for earth grounding power wiring. not bypass earth cords, etc. grounding with two wire extension plug adapters, BEFORE PLUGGING IN instructions. the instrument, comply with installation MAINTENANCE may require power on with the instrument covers removed.
  • Page 8 Verso Filler Page...

  • Page 9: Table Of Contents

    CONTENTS SECTION 1 GENERAL DESCRIPTION MODEL 188..........SPECiFiCATIONS .., ..,..Versatility 1.2.1 , ......, ..,... 1.2.2 Frequency Precision........1.2.3 Amplitude Precision 1 -2 ..,..1.2.4 Waveform Characteristics........1.2.5 General....... . .
  • Page 10 Verso Filler Page...

  • Page 11: General Description

    Scans by Artekmedia 2011 => SECTION GENERAL DESCRIPTION Sweep: An internal ramp sweep the MODEL 188 generator will Sweep/Function from start main generator frequency Model 188, higher stop frequency, decades). linearly (3 decades) or Wavetek Generator, is precision source of sine, tr...
  • Page 12 VCO - Voltage Amplitude Controlled O 1.2.3 Prwc'alon (linear mode) ..1000 change (logarithmic mode) with frequency change up to Up to 10,000 : 1 0 to with frequency less 0.2 dB on ± external Sine variation than: selected limited to ranges through lOOK;...

  • Page 13: Frequency

    CONT check for match of line instru­ SWEEP proper ment voltage and proper fuse type and Set up the 188 and func­ rating. oscilloscope, Model external tion generator shown in perform the figure 2-1 and NOTE steps in table 2-1.
  • Page 14 6000 and 500 SYNC OUT value of Rl48 from 4990 to 6040. OSCILLOSCOPE Change R149. MODEL 188 Remove • e • The result (H I ) (LO) (500 source) 10V pop (6000 source) Into 500 .
  • Page 15 TIME STOP full Press Logarithmic distributed sweep when compared LIN/lOG Button to step linear sweep. SYNC OUT OSCILLOSCOPE OSCILLOSCOPE MODEL 188 • e e • • •• • • SYNC TRIG (HI) (HI) FUNCTION GENERATOR Setup Figure 2·2. Second Setup Figure 2·3.
  • Page 16 Verso Filler Page...

  • Page 17: Controls And Connections

    Scans by Artekmedia 2011 => SECTION OPERATION FREQUENCY MULTIPLIER -Selects CONTROLS AND CONNECTIONS Controls dial one of seven frequency multipliers set­ connectors are ting. The generator front panel controls sh o w n in figure CaNT Button Selects sweep submode to and keyed the following descrip­...

  • Page 19: Voltage Controlled

    Scans by Artekmedia 2011 => FU NCTION Set to waveform. Impedance Connector desi red (LO) DC OFFSET 1 3 wave- OUT (HI) as desi red . Limit figure 3-3). form amplitude to prevent (ITL) 500 OUT SYNC OUT clipp i n g TRIG I N Select for AM PLITU D E...

  • Page 20: Sweep Generator Operation

    attempted range of when the generator frequenc y max i m u m exceed the selected exceeds the range limits. multiplier upper limit is frequency range. four times the (linear) setting, and the (logarithmic) lower limit is 111000th 1110, 000 g ra h with Figure...
  • Page 21 Scans by Artekmedia 2011 => Control Setting Step Press to release. (1/f) (Continuous PERIOD MODE: CONT 8 o Vdc mode of m a i n necessary g e n e r a t o r sweep.) O F FS ET S I N E Frequency '\f\./\/ \.I\/\/...
  • Page 22 G E N E RATO R SY N C B U F F E R (TI L ) SQU A R E C O M PARATOR S H A P E R ----+ P R E A M P LI F I ER S I N E M AX C O N V E RTER...

  • Page 23: Circuit Description

    Scans by Artekmedia 2011 => SECll0N · CIRCUIT DESCRIPTION the f requency desc ribes the fu i m i of the g ca pac itor selected by ncti n s o f m r c i rcuit This e c t to one another cu r­...
  • Page 24 the CONT switc h is trigger is i n­ held triggered cycle started a lways com­ When i n . last released, logic output pleted successive gated a lways start at the hibited from passing any trig­ trigge r signals and the bu rsts 00 pOint.
  • Page 26 - 1 5V ..0 0 0 U E3 ", II. - - - � " D a , � TIII&R UIiIIC i � Cl'I • VII ' , E2S "' �D R 7 4 - � � -.5'1 ..:! :' .
  • Page 27 Scans by Artekmedia 2011 => Table 5-1 _ Alignment Procedure Tester Point Test Adjust Step Check Contro l Settin g Result Remartt + 15 ± .75V Paragraph 5.4, C4 + Ve rity. Step Power Vo lt meter ± 1 5V shou l d track Su pply with i n 30 mV cs -...
  • Page 28 (Continued) Table 5·1 . Alignment Procedure Test Setting Adjust Check Tester Result Remark Step Point Co n trol ( ± .1) kHz Top of Dial: 4.0 D ial FREQ M U LT: x Freq uenc y (Lo g) FUNCTION: Adjust for Sine Distortion It may be necessary...

  • Page 29: Alignment

    Scans by Artekmedia 2011 => SECTION TROUBLESHOOTING FACTORY REPAI R 6.3.2 Diode Wavetek zene r) defective if there is g reater volt) ma i ntains factory repa i r depa rtment fo r diode (except forward voltage those custome rs possessing the necessary pe r­...

  • Page 30: Tables

    located ( not always) defined, Opened capac itor can be Once the begin the isolation malfunction procedu re by indication in test proceed i n parallel selecti ng an table by using good capacitor connected under observing the best malfunction and with the capac i tor wh ich describes...
  • Page 31 Scans by Artekmedia 2011 => (Continued) Tlble 6 - 2. Power Supplle. end G .n tor Loo p ..Indica tion: Fuse blown, no power indication outputs. or no Check Correctly. Procedure Check indicator DS l and VR2 . w i ring E 34 lamp.
  • Page 32 (Continued) Teble 8-3. Output Circuit. Indication: Function outputs missing clipped when TTL sync output OK. Problem with triangle waveform. Check Corrective Procedure amplifier (MAX ) . (open c i rcuit) (HI) AM PLITU DE cw DC OFFSET to OFF. and check 500 OUT circuit.
  • Page 33 Scans by Artekmedia 2011 => 6-5. Square Function Table Indica tion: Square wa veform problem. Corrective P rocedu re Check positions ( refer ope rat i on. i n i tial controls to no r m a l pa ragraph 6 . 4). Check tab l e Check CA 1 0 cathode for...
  • Page 34 Table 6-7. YCO Circuit Indica tion: Generator does not respond correctly to dia l and VCG i nput. Check If Faulty. Check set controls to to pa ragraph 6.4). Check f or norma l i n i tial positions (refer ope ration.
  • Page 35 Scans by Artekmedia 2011 => Table 8-8. Symmetry Indica tion: Waveform symme try problem. I f Faul ty, Check Check ration. contro l s Check i n i t i a l positions ( refe r pa ragraph 6.4). normal problem O.
  • Page 36 Multiplier (Contlnu.d) Table 8-9. C apJIcltancl Indica tion: Problem bottom frequency ranges only. Procedure Check Corrective f requency (2.0 1 00). adjustment. Check 400 Hz b. Ra9. R95. C45. frequency (2.0 1 0). R93 . SW3. 1 0. Check 40 Hz Check frequency (4.0 X ' ) R94 .
  • Page 37 Scans by Artekmedia 2011 => Trigger Logic (Continued) Table 8·1 0. Indication: Generator trigger and gate mode problems, Check Correct Iv. Procedure Check U 9 pi n 1 for TIL high. supply. b. R73, 1 0. Check U 1 0 pi n TTL h i g h .
  • Page 38 Table 1-11 . SWHP Circuit Indication: Sweep Ramp problems. Check CorrectJve Procedure (SWeep). U l . Depress CONT b. SW2. Extend SWPISTOP. Check E48 for + 4V. Depress SWP/STOP. Check collector of 03. 4V peak ramp. If ramp amplitude is 4V peak.

  • Page 39: Parts And Schematics

    Wavetek as qu ickly as develop­ i n to instrument testing pe rmit. Because of the time needed me n t...
  • Page 50 \lVAVETE� DIEGO 9045 Balboa Ave. San D iego, CA 92 1 23 Box 65 1 , San D iego, calif 92 1 1 2 7 1 41279-2200 91 0-335·2007 ArtekMedia 2011 => Scans...

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