Krohn-Hite 1200A Operating Manual
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Krohn-Hite 1200A Operating Manual

Lin ear sweep/function generator 0.2hz to 3mhz
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Model 1200A
Lin ear Sweep/Func tion Gen er a tor
0.2Hz to 3MHz
Se rial No. _______________________
Op er at ing Man ual
Copy right
2004. All rights re served. Con tents of this pub li ca tion may not be re pro duced in
any form with out the writ ten per mis sion of Krohn-Hite Cor po ra tion. Re vi sion 063004. Printed
in U.S.A.
15 Jon a than Drive, Unit 4, Brockton, MA 02301-5566
Tel: (508) 580-1660; Fax: (508) 583-8989
info@Krohn-hite.com; www.krohn-hite.com

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Summary of Contents for Krohn-Hite 1200A

  • Page 1 2004. All rights re served. Con tents of this pub li ca tion may not be re pro duced in any form with out the writ ten per mis sion of Krohn-Hite Cor po ra tion. Re vi sion 063004. Printed in U.S.A.

  • Page 3: Table Of Contents

    Table of Contents Ta ble of Con tents 1 .0 GEN ERAL D E SCRIP TION · · · · · · · · · · · · · · · · · · · · · · · · · 1-1 1 .
  • Page 4 Table of Contents 3. 0 IN COM ING IN SPEC TION AND CHECK OUT · · · · · · · · · · · · · 3-1 3 . 1 I N T R O D U C T I O N · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3 - 1 3 .
  • Page 5 Notes Notes...
  • Page 6 Mdeol 1200A Photo Fig ure 1. Model 1200A Lin ear Sweep/Func tion Generator...

  • Page 7: Gen Eral De Scrip Tion

    IN TRO DUC TION The Krohn-Hite Model 1200A, il lus trated in Fig ure 1, com bines a func tion gen er a tor and ramp gen er- a tor in one in stru ment. An ex clu sive fea ture of the 1200A is WAVEGUARDä, a unique out put pro tec- tion cir cuit that pro tects the gen er a tor’s MAIN (HI) OUT PUT from dam age, if a volt age is ac ci den-...

  • Page 8: Fre Quency Con Trol

    Section 1 - General Description 1.2.3 Fre quency Con trol Sin gle turn dial cal i brated logarithmically from 0.2 to 300 in Hertz, and a 3 po si tion mul ti plier pro vid - ing a 1500:1 cov er age in each mul ti plier po si tion. Sep a rate fine-tune ver nier pro vides 5% ad just ment. MUL TI PLIER FRE QUENCY RANGE (Hz) BAND...

  • Page 9: Op Er A Tional Modes

    Section 1 - General Description 1.2.5.9 DC Com po nents All wave forms are nor mally sym met ri cal about ground with nom i nal zero DC volts. At max i mum out put, drift is less than 5 mil li volts per de gree C. 1.2.5.10 Tri an gle Lin ear ity Greater than 99% from 0.2Hz to 300kHz;...

  • Page 10: T L O U T P U T

    Section 1 - General Description 1.2.10 TTL Out put TTL pulse at gen er a tor fre quency, drives up to 10 TTL loads; rise and fall times less than 15ns. 1.2.11 Con trol Volt age (CV) Out put +2mV to 3 volts, pro por tional gen er a tor fre quency. Ac cu racy, better than 5%.
  • Page 11 1.2.17 Op tional Rack Mount ing Kit (see Fig ure 2 ) Part No. RK-39; per mits in stal la tion of the Model 1200A into a stan dard, 19” rack spac ing. Fig ure 2. Op tional Rack Mount ing Kit Spec i fi ca tions ap ply at 25°C, ±5°C at max i mum out put volt age, and dial set be tween 2 and 300, un less...
  • Page 12 Section 1 - General Description This page in ten tion ally left blank. 1- 6...

  • Page 13: Power Re Quire Ments

    108-132, 180-220 or 216-264 volts. Com ple men tary LINE switches on the rear panel al low the 1200A to be pow ered from one of the above 4 volt age ranges. The AC power re cep ta cle lo cated on the rear panel, is a stan dard 3-pin con nec tor.
  • Page 14 Section 2 - Operation Fig ure 3. Op er at ing Con trols and Con nec tors 2- 2...

  • Page 15: Op Er At Ing Con Trols And Con Nec Tors (See Fig Ure 3)

    Section 2 - Operation C A U T I O N ! The cover of this in stru ment should not be re moved when the in stru ment is con nected to an AC power source, be cause of the po ten tially dan ger ous volt ages that ex ist within the unit. OP ER AT ING CON TROLS AND CON NEC TORS (see Fig ure 3) 2.2.1 Front Panel...

  • Page 16: Rear Panel

    Section 2 - Operation 2.2.1.9 DC Off set: Push-but ton ON-OFF switch, plus sep a rate sin gle turn ver nier, for off set ting the DC level of the out - put wave form be tween ±10 volts, open-cir cuit. The com bined DC off set plus AC sig nal should not ex ceed ±10 volts, open-cir cuit, or clip ping of the wave form may oc cur.

  • Page 17: Op Er A Tion

    1500:1, over the cal i brated por tion of the tun ing dial. To op er ate the Model 1200A as a sweep gen er a tor pro ceed as fol lows: 1) De press the SWP-on but ton.

  • Page 18: Ex Ter Nal Fre Quency Con Trol (Vc)

    Section 2 - Operation 2.3.3 Ex ter nal Fre quency Con trol (VC) The gen er a tor fre quency may also be con trolled by an ex ter nal volt age ap plied to the VC (volt age con trol) in put. A max i mum con trol volt age of zero to 3 volts will vary the gen er a tor fre quency up to a ra tio of 1500:1 within the range of the tun ing dial.

  • Page 19: Vari Able Dc Off Set

    Section 2 - Operation 2.3.4 Vari able DC Off set The vari able DC OFF SET Con trol con sist of a push-but ton ON-OFF switch plus a sin gle turn po ten ti - om e ter. It is used to vary the DC level of the out put wave-form. The OFF SET po ten ti om e ter will vary this level from mi nus (-) 0 volts to plus (+) 10 volts.
  • Page 20 Section 2 - Operation This page in ten tion ally left blank. 2- 8...
  • Page 21 DC Volt me ter (DCVM), for DC volt age mea sure ments from zero to ±50 volts. (Fluke Model 8000A or equiv a lent). Cal i brated DC volt age source, zero to ±3 volts. (Analogic Model AN-3100 or equiv a lent). Dis tor tion An a lyzer. (Krohn-Hite Model 6800 or equiv a lent). 3 -1...
  • Page 22 Section 3 - Incoming Inspection and Checkout PRO CE DURE Af ter al low ing the in stru ment to warm up for at least 30 min utes, set the con trols to the fol low ing po - si tions: FRE QUENCY Hz/STOP FREQ MUL Ti plier X100...
  • Page 23 Section 3 - Incoming Inspection and Checkout change in the gen er a tor’s fre quency; a change of ±0.1 volt on the VC in put will cor re spond to a fre - quency change of ap prox i mately 10Hz times the MULTiplier setting. Dis con nect the DC volt age source from the VC in put.
  • Page 24 Section 3 - Incoming Inspection and Checkout For dis tor tion mea sure ments be tween 300kHz – 3MHz, the use of a Wave or Spec trum An a lyzer is rec om - mended. Dis tor tion is spec i fied as less than 3% to 3MHz. 3.3.10 TTL Out put Con nect the os cil lo scope to the TTL out put, and set the gen er a tor fre quency to be tween 1-10kHzz.

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