HP-618B-Manual 电路图.pdf

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1、I . : HP Archive . . This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! . . On-line curator: Tony Gerbic RadioFans.CN 收音机爱 好者资料库 OPERATING AND SERVICING MANUAL MODEL 6188 SHF SIGNAL GENERATOR SERIALS PREFIXED: 951 - Copyright HEWLETT-PACKARD COMP

2、ANY 1959 275 PAGE MILL ROAD. PALO ALTO. CALIFORNIA, U. S. A. 6 18B004/11-59 RadioFans.CN 收音机爱 好者资料库 Model 618B SPECIFICATIONS Frequency Range: Calibration: Frequency Stability: Output Range: Output Accuracy: Internal Impedance: Modulation: Internal Pulse Modulation: Sync Out Signals: External Synchr

3、onization: Internal Square Wave Modulation: Internal Frequency Modulation: External Pulse Modulation: Sxternal Frequency Modulation: Power Source: Size: Weight: Accessories Supplied: 3,800 to 7,600 mc covered in a single band. Repeller voltage automatically tracked and proper mode automatically sele

4、cted. Direct reading. Frequency calibration accuracy better than il%. Frequency variation less than 0.006% per degree centigrade change in ambient temperature: line voltage change of *lo% causes less than .02% frequency change. 1 milliwatt or 0.223 volt to 0.1 microvolt (0 dbm to -127 dbm) into 50 o

5、hms. Directly calibrated in microvolts and db. Coaxial Type N connector. Within i t 2 db from - 7 dbm to -127 dbm, at the end of 6 ft. output cable, terminated in 50-ohm load. 50 ohms nominal. (VSWR less than 2 ) Internal or external pulse, fm and square wave. Repetition rate variable from 40 to 400

6、0 pps, pulse width vari- able 1/2 to 10 microseconds. 1) Simultaneous with rf pulse - positive. 2) In advance of rf pulse - positive, variable 3 to 300 micro- seconds. (Better than 1 microsecond rise time and 25 to 100 volts amplitude into 100 ohms load.) 1) Sine wave: 40 to 4000 cps, amplitude 5 to

7、 50 volts rms. 2) Pulse signals: Zero to 4000 pps and 5 to 50 volts amplitude, both positive and negative, pulse width 0.5 to 5 microseconds, rise time 0.1 to 1 microsecond. Variable 40 to 4000 GPS, controlled by “pulse rate” control. Saw-tooth sweep rate adjustable 40 to 4000 cps. Frequency deviati

8、on up to i 3 mc. Pulse requirements: negative, width 0.5 to 2500 microseconds. amplitude from 15 to 70 volts positive or Provides capacitive coupling to repeller of klystron. Maximum deviation approximately i5 mc. 115/230 volts *lo%, 50 to 60 cps, 250 watts. Cabinet Mount: 17-1/2 in. wide, 14 in. hi

9、gh, 19-1/2 in. deep. Rack Mount: 19 in. wide, 14 in. high, 17 in. deep behind panel. Cabinet Mount: Net 95 lbs., shipping 118 Ibs. Rack Mount: Net 96 lbs., shipping 119 lbs. AC-16Q Cable Assembly, 6 feet of specially treated RG9A/U 50 ohms coaxial cable terminated at each end with UG-21B/U Type N ma

10、le connectors. Each cable is tested and selected for minimum s w r at frequencies above 4000mc. iii RadioFans.CN 收音机爱 好者资料库 SECTION I Model 618B CONTENTS GENERAL DESCRIPTION PAGE SECTION 11 SECTION 111 SECTION IV SECTION V 1 - 1 Introduction . 1 - 2 Damage in Transit . 1 - 3 Attenuator Calibrated fo

11、r Output Cable . . . . . . . . . 1 - 4 Power Transformer Conversion . . . . . . . . . . . . . 1 - 5 Klystron Tube Warranty . . . . . . . . . . . . . . . . . . OPERATING INSTRUCTIONS . 2 - 1 Operating Precaution . 2 - 2 Controls and Terminals . . . . . . . . . . . . . . . . . . 2 - 3 Operating Instru

12、ctions. General . . . . . . . . . . . . . . 2 - 4 Adjusting the RF Section to Obtain CW Output . . . . . . 2 - 5 Modulated Output . CIRCUIT DESCRIPTION 3 - 1 General . 3 - 3 Modulator Section . 3 - 4 RF Oscillator . 3 - 2 Synchronizing Circuits . . . . . . . . . . . . . . . . . . MAINTENANCE 4 - 1 4

13、 - 2 4 - 3 4 - 4 4 - 5 4 - 6 4 - 7 4 - 8 4 - 9 4 . 10 4 . 11 4 . 12 4 . 13 4 . 14 4 . 15 4 . 16 4 . 17 4 . 18 4 . 19 4 . 20 4 . 21 Introduction . Cabinet Removal . Blower System . . . . . . . . . . . . . . . . . . . . . . Visual Inspection . Test Equipment Required . . . . . . . . . . . . . . . . .

14、Tube Replacement Chart . . . . . . . . . . . . . . . . . Trouble Localization . . . . . . . . . . . . . . . . . . . Trouble Shooting the Power Supply Section . . . . . . . . Checking and Trouble Shooting the RF Generator Section Klystron Removal V114 . . . . . . . . . . . . . . . . . . Klystron Repl

15、acement . . . . . . . . . . . . . . . . . . . Calibrating the Frequency Dial . . . . . . . . . . . . . . Replacing and Recalibrating the Attenuator . . . . . . . . Power Monitor Probe Assembly . . . . . . . . . . . . . Checking and Trouble Shooting the Pulser Section . . . . Calibrating the Pulse Ra

16、te Dial Calibrating the Pulse Delay Dial Calibrating the Pulse Width Dial Lubrication . Replacing Reflector Potentiotneter R174 . . . . . . . . . Adjustments Following Replacement of Klystron V114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TABLEOFREPLACEABLEPAR

17、TS 5 - 1 Table of Replaceable Parts . iv 1 - 1 1 - 1 1 - 2 1 - 2 1 - 2 I1 . 1 I1 . 1 1 1 . 3 I1 . 3 I1 . 3 111 . 1 111 . 1 111 . 2 111 . 7 I V - 1 IV . 1 IV . 2 IV . 2 IV . 2 IV . 3 IV . 5 IV . 6 IV . 11 IV . 12 IV . 12 IV . 13 1V . 16 IV . 16 IV . 18 IV . 18 IV . 20 1v . 22 IV . 22 IV . 22 Iv . 22

18、v - 1 RAYTHEON KLYSTRON TUBE WARRANTY FOR TUBES SUPPLIED BY HEWLETT-PACKARD Raytheon klystron tubes are guaranteed by the manufacturer only to the original purchaser, the Hewlett-Packard Company. For this reason, all warranty claims for premature failure of this tube, if purchased from or supplied b

19、y the Hewlett-Packard Company, must be made to Hewlett-Packard and not Raytheon. All credit allowed by Raytheon will be passed on to the customer by Hewlett-Packard. This klystron tube is guaranteed against defects in manufacture only, for a period of 500 hours filament operation or one year from da

20、te of purchase, whichever occurs first. Allowance will be proportional to the percent guaranteed life (filament hours) remaining. Whenever a tube is returned for a warranty claim, the reverse side of this sheet must be filled out in full and returned with the tube. Follow the shipping instructions c

21、arefully to insure safe arrival of the tube. If a tube arrives broken, delay will be caused in determining who is liable - the transportation company or the shipper. Many tubes will be subjected to a laboratory examination to determine the cause of failure before credit can be allowed. Proper examin

22、ation is either difficult or impossible when the tube is damaged. SHIPPING INSTRUCTIONS 1) Fill out the Warranty Claim on the reverse side of this sheet. 2) Carefully wrap the tube in at least 1/4 inch thick cotton batting, or other soft padding material. 3) Wrap the padded tube with the Warranty Cl

23、aim in heavy kraft paper. 4) Pack in a rigid container which is at least 4 inches larger than the padded tube on all sides. Surround the tube with packed excelsior or similar shock ab- sorbing material. 5) Tubes returned from outside the continental United States should be packed in a wooden box. 6)

24、 Mark the box FRAGILE and ship prepaid, preferably via Air Freight or Rail- way Express. Ship to Hewlett-Packard. HEWLETT-PACKARD CO. 275 PAGE MILL ROAD, PAL0 ALTO, CALIF. U.S.A. RAYTHEON KLYSTRON WARRANTY CLAIM Please Answer All Questions Fully FROM: NAME: COMPANY: ADDRESS: Person to contact for fu

25、rther information: NAME: TITLE: COMPANY: ADDRESS: DATE 1) Klystron Type No. Serial No. 2) instrument in which tube was used, Model 3) Date tube purchased 4) Tube purchased from 5) Tube was original 6) Total number of hours in operation 7) COMPLAINT (Please describe nature of trouble) , Serial No. or

26、 replacement ! 8) OPERATING CONDITIONS (Please describe conditions prior to and at time of failure) I SIGNATURE Model 618B f I Sect. I Page 1 SECTION I GENERAL DESCRIPTION 1-1 INTRODUCTION The Model 618B SHF Signal Generator is designed to generate voltages in the frequency range from 3800 to 7600 m

27、egacycles with one milliwatt power output available across the band. The output fre- quency is indicated on a direct reading dial, and the attenuator controlling output level is calibrated in microvolts and decibels. The types of rf output are as follows: , UNMODULATED (CW). INTERNAL PULSE MODULATIO

28、N - Repetition rate variable from 40 to 4000 pulses/ sec. Pulse length variable from .5 to 10 micro- seconds as measured between points that are 50% of the maximum amplitude of the initial rise. The combined rise and decay time does not exceed . 5 microseconds. EXTERNAL PULSE MODULATION - External p

29、ulse modulation requires pulses having the following characteristics: Amplitude 15 to 70 volts Width .5 to 2500 microseconds Separation 1 to 2500 microseconds Polarity positive or negative Rise Time .1 to 1 microsecond Decay Time .1 to 1 microsecond INTERNAL FREQUENCY MODULATION - The saw-tooth swee

30、p rate is variable from 40 to 4000 cycles/sec. The frequency deviation is vari- able from 0 to *3 megacycles. EXTERNAL FREQUENCY MODULATION - With sine-wave input, frequency deviation up to 10 megacycles can be obtained depending on the frequency of the radio frequency oscillator. INTERNAL SQUARE-WA

31、VE .MODULATION - Variable from 40 to 4000 cycles/sec. EXTERNAL SQUARE-WAVE MODULATION - Externally generated square wave of at least 15 volts amplitude and a frequency o f 40 to 20,000 cycles/sec. SYNC OUT SIGNALS - 1) Delayed Sync Out. A positive pulse simultane- ous with the front of the radio fre

32、quency pulse. Pulse amplitude at least 25 volts and rise time shorter than one microsecond. The output circuit is designed to work into a load of 1000 ohms or more shunted by not more than 50 ppf capacity. 2) Undelayed. Has the same characteristics as the number 1 sync out signal except that the pul

33、se precedes the front of the radio frequency pulse by 3 to 300 microseconds. Both the pulse and frequency modulated radio fre- quency output may be synchronized with the follow- ing externally generated signals. a. Sine waves of 40 to 4000 cycles/sec. and 5 to 50 volts (rms) amplitude. b. Pulses of

34、40 to 4000 cycles/sec., a peak amplitude of 5 to 50 volts, a rise time of .1 to 1 microsecond, and a width of .5 to 5 microseconds. 1-2 DAMAGE IN TRANSIT This instrument should be thoroughly inspected when it is received. If any damage is evident, refer to the “Claim for Damage in Shipment” paragrap

35、h on the Warranty page. Sect.1 Page 2 1-3 ATTENUATOR CALIBRATED FOR OUTPUT CABLE The accuracy of the output system and the cali- bration of the attenuator in the Model 618B is de- termined at the end of the output cable supplied with the instrument. CAUTION Do not connect rf or dc power in any magni

36、tude to the output terminals of this instrument. As little as 1/5 watt can either severely damage or burn out the attenuator probe. Extreme care should be exercised when working with transceiver types of equipment to insure that the transmitter section is not operating while the Model 618B is connec

37、ted to the antenna. - Erratic instrument performance at the output terminals, or even no power output is frequently an indication that the instrument has been sub- jected to the abuse described above. This condi- tion may be confirmed by measuring either the dc resistance of the attenuator or the vs

38、wr looking into the panel connector. DC resistance = approximately 85 ohms, VSWR (at panel connector)=2.0 or better. If investigation shows an attenuator burnout, the probe assembly must be replaced. Model 618B 1-4 POWER TRANSFORMER CONVERSION s 8) Should it be desired to operate the Model 618B from

39、 a 230 volt source, proceed as follows: 1) Remove the following transformer terminal jumpers: T301, 1A to 3A and 2A to4A; T302, 1 to 3 and 2 to 4. r 2) Install the following jumpers: T301, 2A to 3A; T302, 2 to 3. 3) Change the line fuse F301 toa 1.6 ampere, slow-blow fuse. As shown in the schematic

40、diagram of the power supply this alteration changes the primary wind- ings of the power transformer from a parallel arrangement to a series arrangement. - 1-5 KLYSTRON TUBE WARRANTY Two copies of the klystron warranty sheet have been included in this manual. When replacing a klystron tube which has

41、failed prior to the expiration of the guarantee, fill out a warranty sheet and return it with the tube to the company from which the tube was obtained. A new sheet will be fur- nished with each replacement tube purchased from the Hewlett-Packard Company. Model 618B Sect. I1 Page 1 2-1 OPERATING PREC

42、AUTION This equipment employs high circuit voltages (1500 volts). Although bleeder circuits are used to prevent capacitors from retaining charges after the power has been disconnected, always discharge and ground circuits before touching them when working inside the cabinet. 2-2 CONTROLS AND TERMINA

43、LS A. - ON This toggle switch controls all power to the instrument. B. POWER When this red light is on, it indicates that power is being supplied to the instrument. C. SIGNAL FREQUENCY This control is used to adjust the operating frequency of the SHF oscillator to the desired output frequency. The f

44、requency is read on the MEGA- CYCLES dial above the control. A 360 vernier scale graduated from 0 to 100 is provided on the control itself so that accurate resetting to spe- cific frequency can be made. D. ZEROSET This control is used to set the needle of the POWER SET meter to the zero position whe

45、n the MOD. SELECTOR switch is in the OFF position and the power switch is in the ON position. E. POWERSET This control is used to set the needle of the POWER SET meter to 0 db (red line at center of scale) prior to adjusting the attenuation. It also operates the fiducial over the OUTPUT ATTEN. (atte

46、nuator) dial to establish the reference level for reading the attenuator dial. SECTION I1 0 P ERATl N G INSTRU CTI 0 NS F. OUTPUT ATTEN. This control determines the attenuation of the radio frequency output of the signal generator. It also operates the OUTPUT ATTN dial so that the reading of this di

47、al under the index indicates the output level of the signal generator in voltage and in decibels below one milliwatt. G. FM AMPLITUDE This control adjusts the deviation (frequency swing) of the output frequency from 0 to *3 mega- cycles from the center (CW) frequency when fre- quency modulation is e

48、mployed. H. MOD. SELECTOR This switch is located in the upper left corner of the front panel of the signal generator. It has the following positions: 1) EXT. FM - When in this position, the signal generator circuits are switched so that an external sine- or saw -tooth voltage may be applied to the EXT. MOD. input connector to provide externally modulated output. 2) INT. FM - When in this position, the si