HP-3048A_option_K21_AM_detector_filter 电路图.pdf

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1、 HP Archive This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! On-line curator: John Miles, KE5FX RadioFans.CN 收音机爱 好者资料库 m HEWLETT PACKARD OPERATING AND SERVICE MANUAL M O D E L 3 0 4 8 A O P T I O N K 2 1 AM D E T E C T O R F I L T E R How To U

2、se This Manual This Manual should be used in conjunction with the 3048A Operating Manual, HP Part Number 03048-90001 (printed March 1988), and the 3048A Reference Manual, HP Part Number 03048-90002 (printed June 1988). Applicable Serial Numbers This Manual Modification Insert applies to instruments

3、with serial number prefixes greater that or equal to 2820A. Updates to this Manual Insert Periodically, changes are made to this Manual Insert to correct errors in the original printing and to include Option improvements. Corrections are indicated by a mark at the right-hand edge of the modified tes

4、t. The mark used is keyed to the date the corrections are added (found on this cover page below the issue date). Manual Modification Inset Issued November 1988 HP Part Number 03048-92035 Updated June 1989 Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34

5、, Spokane, W A 99220 U.S.A. RadioFans.CN 收音机爱 好者资料库 m HEWLETT PACKARD 3048A Option K21 03048-92035 Page 2 of 21 SECTION I. GENERAL INFORMATION 1-1. INTRODUCTION This manual contains information required to install, operate, and service the Hewlett-Packard Model 3048A Option K21 AM Detector Filter, a

6、n optional accessory for the HP 3048A Phase Noise Measurement System. The AM Detector Filter Operating and Service Manual has five sections. The subjects addressed are: SECTION I GENERAL INFORMATION SECTION II OPERATION SECTION III PERFORMANCE TESTS SECTION IV REPLACEABLE PARTS SECTION V SERVICE 1-2

7、. SPECIFICATIONS Instrument specifications are listed in Table 1-1. These specifications are the performance standards or limits against which the instrument may be tested. Table 1-1. Specifications Characteristics MAXIMUM INPUT DC FLATNESS Performance Limits +/-5 V +/-0.5 dB Conditions 1 Hz to 40 M

8、Hz Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. RadioFans.CN 收音机爱 好者资料库 m HEWLETT 3048A Option K21 03048-92035 1 PACKARD P a g e 3 o f 2 1-3. DESCRIPTION The HP Model 3048A Option K21 AM Detector Filter is an accessory to t

9、he HP 3048A Phase Noise Measurement System. It contains a DC return for an AM detector, such as the HP 33330C/D, and a DC blocking capacitor. The insertion loss of the AM Detector Filter is typically less than 1.5 dB. The switch on the front cover can be set for either positive or negative AM detect

10、or polarity. 1-4. INITIAL INSPECTION Inspect the shipping container. If the container and/or packing material is damaged, it should be kept until the contents of the shipment have been checked mechanically and electrically. If there is mechanical damage or if the instrument does not pass the perform

11、ance tests, notify the nearest Hewlett-Packard office. Keep the damaged shipping materials (if any) for inspection by thecarrier and a Hewlett-Packard representative. 1-5. ACCESSORIES The accessories supplied with the HP 3048A Opt. K21 are listed below: IMPEDANCE MATCHING NETWORK 03048-62013 CALIBRA

12、TION LOAD 03048-62014 CALIBRATION CABLES (2) 03048-62017 ADAPTOR SMA(F) TO SMC(F) (3) 1250-1694 ADAPTOR SMA(M) TO SMC(F) (1) 1250-1697 Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. E fm HFWI FTT 3 0 4 8 A P t , 0 n K21 nPM t

13、 f r r C I r f l Z 03048-92035 .KM PACKARD p 4 f 2j SECTION I I . OPERATION 2-1. APPLICATIONS An AM noise measurement can be made with a HP 3048A as described in AM Noise Using an HP 33330C on page 3-111 of the HP 3048A Phase Noise Measurement System Operating Manual. The HP 3048A Opt. K21 AM Detect

14、or Filter is substituted for the f i l t e r network described in Table 3-22, and shown schematically in Figure 3-31. 2-2. CONNECTIONS To setup the equipment for an AM Noise Measurement with the HP 3048A and AM Detector Filter, refer to Figure 2-1. The best results will be obtained when semi-rigid c

15、oaxial cables are used to connect the components used in the measurement and should be used whenever possible. Ground loops can be a problem in this type of measurement. To minimize ground loops, a DC Block is inserted between the RF source under test and the AM detector. The recommended DC Block is

16、 the Narda 562 (Type-N connectors, 10 MHz to 12.4 GHz) or the Narda 4563 (SMA connectors, 500 MHz to 18 GHz). DC Blocks may also be referred to as Audio Interface Suppressors or Noise Suppressors. A ground loop can be suspected i f the 60 Hz spurs have an amplitude greater than -80 dBc. Connect the

17、A M detector directly to the input connector of the HP 3048A Opt. K21 AM Detector Filter. The output of the A M Detector Filter should be connected directly to the HP 11848A Phase Noise Interface front-panel NOISE INPUT connector. However, i f a D C Block is inserted between the RF source under test

18、 and the AM detector, i t is not necessary to connect the output of the AM Detector Filter to the NOISE INPUT of the HP 11848A. A short semi-rigid cable will be sufficient to make this connection i f a DC Block is used. To connect the AM Detector Filter directly to the NOISE INPUT, connect a N(m) to

19、 SMA(m) adaptor (HP part number 1250- 1994, one is supplied with the HP 3048A as part of the Noise Floor Fixture, HP part number 03048-61032) to the HP 11848A NOISE INPUT. Then connect a SMA(m) to SMA(f) right angle adaptor (HP part number 1250-1249) to the N(m) to SMA(m) adaptor and the HP 3048A Op

20、t. K21 AM Detector Filter output. Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, W A 99220 U.S.A. m HEWLETT PACKARD 3048A Option K21 03048-92035 Page 5 of 21 HP 3561A DYNAMIC SIGNAL ANALYZER HP I1848A PHASE NOISE INTERFACE HP 33330C/D COAXIA

21、L CRYSTAL DETECTOR HP 3048A OPT. K21 AM DETECTOR FILTER FIGURE 2-1. SETUP FOR AM NOISE MEASUREMENT WITH HP 3048A Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. tma HEWLETT PACKARD 3048A Option K21 03048-92035 Page 6 of 21 SEC

22、TION III. PERFORMANCE TESTS 3-1. INTRODUCTION The procedures in this section test the instruments electrical performance using the specifications of Table 1-1 as performance standards. All tests are performed without accessing the interior of the instrument. NOTE For greatest accuracy, allow the tes

23、t equipment to warm up at least one-half hour. 3-2. PERFORMANCE TEST RESULTS Results of the performance tests may be tabulated in the Test Results Tables at the end of each procedure. The Test Results Tables list all of the tests specifications and acceptable limits. The results recorded at incoming

24、 inspection, can be used for comparison in periodic maintenance, troubleshooting, and after repairs. 3-3. CALIBRATION CYCLE This instrument requires periodic verification of performance. Depending on the use and environmental conditions, the instrument should be checked using the following performan

25、ce test at least once every year. 3-4. SPECIAL EQUIPMENT A Calibration Load and Impedance Matching Network are required to run these Performance Tests. One of each is supplied with the HP 3048A Opt. K21 AM Detector Filter. Service information on these devices and an easy method to build replacements

26、 if the originals are lost or damaged are given starting on page 16 of this manual. 3-5. PERFORMANCE TESTING No abbreviation of the performance testing is recommended. Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. WKS% HEWLE

27、TT LHM PACKARD 3048A Option K21 03048-92035 Page 7 of 21 PERFORMANCE TEST 1 100 KHZ TO 40 MHZ FLATNESS TEST DESCRIPTION This test measures the flatness of the HP 3048A Opt. K21 AM Detector Filter from 100 kHz to 40 MHz with a HP 3585A/B. A reference is taken with the HP 3585A/B tracking generator co

28、nnected by a short cable to the impedance matching network and calibration load. The calibration load output is connected to the 50 ohm input of the HP 3585A/B with a short cable. Once the reference trace is measured and stored in the HP 3585A/B memory, the reference load is replaced with the device

29、 under test (DUT). The results are then measured and recorded in Table 3-1. EQUIPMENT SPECTRUM ANALYZER HP 3585A/B IMPEDANCE MATCHING NETWORK 03048-62013 CALIBRATION LOAD 03048-62014 CALIBRATION CABLES (2) 03048-62017 PROCEDURE 1. Connect the equipment up as shown in Figure 3-1. HP 3585A/B SPECTRUM

30、ANALYZER HWOONG tou-iroo FIGURE 3-1. SETUP FOR REFERENCE MEASUREMENT WITH HP 3585A/B Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. tvi HEWLETT PACKARD 3048A Option K21 03048-92035 Page 8 of 21 2. Press the green INSTR PRESET

31、 key on the HP 3585A/B. 3. Setup the HP 3585A/B as follows: START FREQ 100 kHz STOP FREQ 40 MHz dB/DIV 1 dB REFERENCE LEVEL -30 dBm AUTO RANGE OFF 4. The trace should be in the upper half of the HP 3585A/B display. If the trace looks good, press the STORE A - B key on the HP 3585A/B. 5. Press the A-

32、B key on the HP 3585A/B to activate the trace. 6. Turn off the B trace by pressing the VIEW B key on the HP 3585A/B. There should only be one trace on the HP 3585A/B CRT and it should be a straight line in the middle of the screen. 7. Replace the Calibration Load with the Opt. K21 A M Detector Filte

33、r as shown in Figure 3-2. HP 3585A/B SPECTRUM ANALYZER HP 030*8-62013 IMPEDANCE MATCHING N E W * * HP 030*8- 62017 CAUBOATON CAfllf MP3048A OPT. K21 AM D6TECTOR FILTER FIGURE 3-2. SETUP FOR FLATNESS TEST WITH HP 3585A/B. Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission

34、Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. WhatHEWLETT mLHM PACKARD 3048A Option K21 03048-92035 Page 9 of 21 8. Set the DETECTOR POLARITY switch on the HP 3048A Opt. K21 AM Detector Filter to the POS position. 9. Use the rotory knob on the HP 3585A/B to position the cursor within 700 Hz of the freq

35、uencies listed in Table 3-1. Record the cursor level under the POS DETECTOR POLARITY in Table 3-1. 10. Set the DETECTOR POLARITY switch to the NEC position and repeat Step 9. Record the results under NEG DETECTOR POLARITY in Table 3-1. TABLE 3-1. FLATNESS TEST RESULTS FROM 100 kHz TO 40 MHz FREQ (MH

36、z) .1 4.0 8.0 12.0 16.0 20.0 24.0 28.0 32.0 36.0 40.0 MEASURED RESULTS POS DETECTOR POLARITY LEVEL (dB) LOWER LIMIT (dB) -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 UPPER LIMIT (dB) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 NEG DETECTOR POLARITY LEVEL (dB) LOWER LIMIT (dB) -0.5 -0.5 -0.

37、5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 UPPER LIMIT (dB) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. What HEWLETT MlfnM PACKARD 3048A Option K21 03048-92035 Page 10 of 21 PERFO

38、RMANCE TEST 2 ,1 HZ TO 10 HZ FLATNESS TEST DESCRIPTION This test measures the flatness of the HP 3048A Opt. K21 from .1 Hz to 10 Hz with a HP 3561A. A reference is taken with the HP 3561A Noise Source (rear panel) connected with a BNC cable to the impedance matching network and calibration load. The

39、 calibration load output is connected to the HP 3561A input through a 50 ohm feed-thru with a short cable. After the reference trace is measured and stored in the HP 3561As memory, the reference load is replaced with the device under test (DUT). The results are measured and recorded in Table 3-2. EQ

40、UIPMENT SPECTRUM ANALYZER HP 3561A IMPEDANCE MATCHING NETWORK 03048-62013 CALIBRATION LOAD 03048-62014 CALIBRATION CABLE (2) 03048-62017 50 OHM FEEDTHRU HP 10100C BNC CABLE 8120-1840 BNC ADAPTOR 1250-0080 PROCEDURE 1. Connect the equipment as shown in Figure 3-3. -OCA MXK1 0UTW1W*I BWCCABtf / BNC MW

41、ttn . M TWO- HP 3S6IA DYNAMIC SGNAL ANALYZER o- NG KKM - H -.- CKIOAO FIGURE 3-3. SETUP FOR REFERENCE MEASUREMENT WITH HP 3561A Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. m HEWLETT 3048A ptin K21 r,rC(7rriZ 03048-92035 PA

42、CKARD Page 11 of 21 2. Press the green PRESET key on the HP 3561A. 3. Setup the HP 3561A as follows: FORMAT SINGLE FREQ START 0 Hz 10 Hz SPAN FREQ AXIS to log WINDOW UNIFORM SOURCE PERIODIC NOISE 0 dB ATTN RANGE AUTO RNG off perform SINGLE AUTO RNG INPUT RMS 4 AVGS START start a measurement sweep 4.

43、 Wait for the HP 3561A to complete the sweep of 4 averages and then continue the setup of the HP 3561A as follows: VERT SCALE SINGLE AUTO SCL STORE/RECALL STORE IN Ml DEFINE TRACE MATH FCN SELECT MAG / Ml VERT SCALE perform SINGLE AUTO SCL 2 dBV FULL SCALE 5. The trace should be a straight line in t

44、he center of the HP 3561A display. 6. Replace the Calibration Load with the AM Detector Filter as shown in Figure 3-4 and set the DETECTOR POLARITY switch to the POS position. 7. Press the START key on the HP 3561A and wait for the HP 3561A to complete the measurement. 8. Position the HP 3561A marke

45、r to each of the frequencies listed in Table 3-2 by pressing MKR, (DEFINE MKR POS), frequency to be measured (in hertz), and (Hz) on the HP 3561A. Record the marker level for each frequency under POS DETECTOR POLARITY in Table 3-2. Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 240

46、01 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. m HEWLETT PACKARD 3048A Option K21 03048-92035 Page 12 of 21 9. Set the DETECTOR POLARITY switch to the NEC position. Repeat Steps 7 and 8. Record the results under NEG DETECTOR POLARITY in Table 3-2. HP 3561A DYNAMIC SIGNAL ANALYZER f * x t SOUR

47、CE OUT PUU HEAP) BNCCABlf BCO-B40 B ADAPTER 0 - O 0 M HP W04B-4J013 *PtD*MC MATCH* UtTWiCfl * 03048-620 CAIORACN CADU MP48A OPT. K21 AMOEUCTOnrWEf FIGURE 3-4. SETUP FOR FLATNESS TEST WITH HP 3561A TABLE FREQ (MHz) 0.1 1.0 5.0 10.0 3-2. FLATNESS TEST RESULTS FROM .1 Hz TO 10 Hz MEASURED RESULTS POS D

48、ETECTOR POLARITY LEVEL (dB) LOWER LIMIT (dB) -5.0 -0.5 -0.5 -0.5 UPPER LIMIT (dB) -2.0 0.5 0.5 0.5 NEG DETECTOR POLARITY LEVEL (dB) LOWER LIMIT (dB) -5.0 -0.5 -0.5 -0.5 UPPER LIMIT (dB) -2.0 0.5 0.5 0.5 Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34,

49、Spokane, WA 99220 U.S.A. LV1 HEWLETT PACKARD 3048A Option K21 03048-92035 Page 13 of 21 PERFORMANCE TEST 3 DC LEAKAGE TEST DESCRIPTION This test measures the leakage current of the capacitors in the A M Detector Filter. A 5V supply is applied to the input. The output is connected through a 50 ohm feed-thru to the input of a voltmeter. The leaka