HP-3048A_option_K23_DC_blocking_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 HAHUAL M O D E L 3 0 4 8 A O P T I O N K 2 3 D C B L O C K I N G F I L T E R How To

2、Use This Manual This Manual should be used in conjunction with the HP 3048A Operating Manual, HP Part Number 03048-90001 (printed March 1988), the HP 3048A Reference Manual, HP Part Number 03048-90002 (printed June 1988), and the HP 3048A System Calibration Manual, HP Part Number 03048-90015 (printe

3、d January 1988). Applicable Serial Numbers This Manual applies to instruments with serial number prefixes greater than or equal to 2820A. Updates to this Hanual Periodically, changes are made to this Manual to correct errors in the original printing and to include Option improvements. Corrections ar

4、e indicated by a mark at the right-hand edge of the modified text. The mark used is keyed to the date the corrections are added (found on this cover page below the issue date). Operating and Service Manual Issued December 1988 HP Part Number 03048-92036 Updated June 1989 Updated April 1990 Copyright

5、 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 PACKARD 3048A Option K23 03048-92036 Page 2 of 20 SECTION h 6ENERAI IUFPRMATION 1-1. INTRODUCTION This manual contains information required to install, o

6、perate, and service the Hewlett-Packard Model 3048A Option K23 DC Blocking Filter, an optional accessory for the HP 3048A Phase Noise Measurement System. The DC Blocking Filter Operating and Service Manual has five sections. The subjects addressed are: SECTION I GENERAL INFORMATION SECTION II OPERAT

7、ION SECTION III PERFORMANCE TESTS SECTION IV REPLACEABLE PARTS SECTION V SERVICE 1-2. SPECIFICATIONS Instrument specifications are listed in table 1-1. These specifications are the performance standards or limits against which the instrument may be tested. CHARACTERISTICS MAXIMUM INPUT DC FLATNESS T

8、able 1-1. Specifications PERFORMANCE LIMITS +/-30 V +/-0.5 dB CONDITIONS 5 Hz to 40 MHz o9 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 WL-m HFWLPTT 3048A Option K23 Whn SFZI 03048-92036 %Lf!M PACKAR

9、D p 3 o f 2 0 1-3. DESCRIPTION The HP Model 3048A Option K23 DC Blocking Filter is an accessory to the HP 3048A Phase Noise Measurement System. It contains a blocking capacitor designed to allow noise measurements on power supplies with the HP 3048A. The Insertion loss of the DC Blocking Filter is t

10、ypically 6.0 dB when loaded by the 50 ohm input of the HP 11848A Phase Noise Interface. The switch on the front cover can be set for either a positive or negative power supply. 1-4. INITIAL INSPECTION Inspect the shipping container. If the container and/or packing material is damaged, it should be k

11、ept 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 performance tests, notify the nearest Hewlett-Packard office. Keep the damaged shipping materials (if any) for inspection by the carrier and a

12、Hewlett-Packard representative. 1-5. ACCESSORIES The accessories supplied with the HP 3048A Opt. K23 are listed below: IMPEDANCE MATCHING NETWORK 03048-62015 CALIBRATION LOAD 03048-62016 CALIBRATION CABLES (2) 03048-62017 ADAPTER SMA(F) TO SMC(F) (3) 1250-1694 ADAPTER SMA(M) TO SMC(F) (1) 1250-1697

13、ADAPTER RT ANGLE SMA(M) TO SMA(M) 1250-1397 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 K23 03048-92036 Page 4 of 20 SECTION II. OPERATION 2-1. APPLICATIONS The HP 3048A Opt. K23 DC Blockin

14、g Filters main purpose is to make noise measurements on power supplies or any other baseband noise source that has a DC offset. The DC Blocking Filter will enable the HP 3048A to have maximum dynamic range. The HP 3048A has two methods of measuring baseband noise. Noise Measurement Using the HP 3561

15、A Only, and Baseband Noise Measurement. These methods are described in the HP 3048A Phase Noise Measurement System Reference Manual (HP part number 03048-90002), Section 2, Measurement Definitions. 2-1. CONNECTIONS Connect the output of the baseband noise source to the input of the DC Blocking Filte

16、r. The output of the DC Blocking Filter is connected to either the NOISE INPUT of the HP 11848A or directly to the input of the HP 3561A. The best results will be obtained when semirigid coaxial cables are used to connect the components used in the measurement and should be used whenever possible. A

17、 equipment setup diagram is given for each type of baseband measurement that the HP 3048A can perform. The setup diagrams for Noise Measurement Using the HP 3561A Only and Baseband Noise Measurement are shown in figure 2-1 and figure 2-2 respectively. Table 2-1 gives the insertion loss and low frequ

18、ency cutoff for each of these measurement types. Table 2-1. HP 3048A Option K23 Insertion Loss and Low Freq. Cutoff HP 3048A MEASUREMENT TYPE INSERTION LOSS LOW FREQUENCY CUTOFF Baseband Noise HP 3561A Only 6.0 dB typical B key on the HP 3585A/B. 5. Press the A-B key on the HP 3585A/B to activate th

19、e 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. K23 DC Blocking Filter as shown in Figure 3-2. HP3585A/B SPE

20、CTOUM ANALYZER Mwawa MKHM * 30*8* OPI -23 KBlOOONGflLl Figure 3-2. Setup for Flatness Test with HP 3585A/B Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. m HEWLETT PACKARD 3048A Option K23 03048-92036 Page 9 of 20 8. Set the

21、DETECTOR POLARITY switch on the HP 3048A Opt. K23 DC Blocking Filter to the POS position. 9. Use the rotary knob on the HP 3585A/B to position the cursor as close as possible tothe frequencies listed in table 3-1. Record the cursor level under the POS DETECTOR POLARITY in table 3-1. 10. Set the DETE

22、CTOR 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 (MHz) 0.1 4.0 8.0 12.0 16.0 20.0 24.0 28.0 32.0 36.0 40.0 MEASURED POS DETECTOR POL* LEVEL (dB) LOWER LIMIT (dB) -0.

23、5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 RITY 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 RESULTS NEG 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 Copyright

24、 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. m HEWLETT PACKARD 3048A Option K23 03048-92036 Page 10 of 20 9 PERFORMANCE TEST 2 1 HZ TO 50 HZ FLATNESS TEST DESCRIPTION This test measures the flatness of the HP 3048A Opt. K23 from 1 H

25、z to 50 Hz with a HP 3561A. A reference is taken with the HP 3561A Noise Source (rear panel) connected with a 8NC cable to the impedance matching network and calibration load. The calibration load output is connected to the HP 3561A input through a 50-ohm feedthru with a short cable. After the refer

26、ence trace is measured and stored in the HP 3561As memory, the reference load is replaced with the device under test (DUT). The results are then measured and recorded in table 3-3. EQUIPMENT SPECTRUM ANALYZER HP 3561A IMPEDANCE MATCHING NETWORK 03048-62015 CALIBRATION LOAD 03048-62016 CALIBRATION CA

27、BLES (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. OJ561A OYNAUC SJGK ANALYZE B NKISCAXf OUPUT IF&WI 6MC Wo#- CAl*IWe*CA*tf . : . ,. -. . *i . Figure 3-3. Setup for Reference Measurement with HP 3561A Co

28、pyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. tvi r HEWLETT 3048A Option K23 PACKARD 03048-92036 PACKARD p JJ Q f 2Q 2. Press the green PRESET key on the HP 3561A. 3. Set up the HP 3561A as follows: FORMAT SINGLE FREQ 50 Hz SP

29、AN FREQ AXIS to log WINDOW UNIFORM SOURCE PERIODIC NOISE 0 dB ATTEN RANGE AUTO RNG off perform SINGLE AUTO RNG INPUT AUTO CAL off perform SINGLE CAL AVG RMS DEFINE NUM AVGS 4 ENTER START start a measurement sweep 4. Wait for the HP 3561A to complete the sweep of 4 averages and then continue the setu

30、p of the HP 3561A as follows: VERT SCALE SINGLE AUTO SCL STORE/RECALL STORE IN Ml DEFINE TRACE MATH FCN SELECT MAG / Ml ENTER VERT SCALE perform SINGLE AUTO SCL 2 dBV FULL SCALE 5. The trace should be a straight line in the center of the HP 3561A display. Change VERT SCALE to 0.3 dBV FULL SCALE. 6.

31、Replace the calibration load with the DC Blocking Filter as shown in figure 3-4 and set the DETECTOR POLARITY switch to the POS postion. 7. Press the START key on the HP 3561A and wait for completion of the measurement. 8. Position the marker on the HP 3561A at each of the frequencies listed in tabl

32、e 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 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220

33、U.S.A. m HEWLETT PACKARD 3048A Option K23 03048-92036 Page 12 of 20 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. HP3S6W DNAMC SOUL *HALyZ8 MPOJOW-6W KWflCBNifiLfR Figure 3-4. Setup for Flatness Test with H

34、P 3561A FREQ (MHz) 1 5 10 20 50 Table 3-2. Flatness Test Results from 1 Hz to 50 Hz MEASURED RESULTS P0S DETECTOR POLARITY NEG DETECTOR POLARITY LEVEL (dB) LOWER LIMIT (dB) -5.0 -0.5 -0.5 -0.5 -0.5 UPPER LIMIT (dB) -2.0 0.5 0.5 0.5 0.5 LEVEL (dB) LOWER LIMIT (dB) -5.0 -0.5 -0.5 -0.5 -0.5 UPPER LIMIT

35、 (dB)_ -2.0 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. m HEWLETT PACKARD 3048A Option K23 03048-92036 Page 13 of 20 n PERFORMANCE TEST 3 DC LEAKAGE TEST DESCRIPTION This test measures the leakage current o

36、f the capacitors in the DC Blocking Filter. A 30V supply is applied to the input. The output is connected through a 50-ohm feedthru to the input of a voltmeter. The voltage dropped across the 50-ohm feedthru is measured to determine the leakage current. EQUIPMENT VOLTMETER HP 3478A POWER SUPPLY HP 6

37、205B 50-OHM FEEDTHRU HP 10100C * PROCEDURE 1. Connect the equipment as shown in figure 3-5. 2. Set the DETECTOR POLARITY switch to the POS position. 3. Turn on the power supply and set it for 30 Volts. 4. Wait for 2 minutes and then read the voltmeter. Record the voltmeter reading below: Voltmeter r

38、eading spec: m OJTMT n r Figure 5-3 CUI GROUND POSTS HI CUI GROUND POSTS SOLDER CONNECTORS TOGETHER Figure 5-4 REFER. DESIG. R l Table 5- HP PART NUMBER 0698-7205 1250-0836 1250-0836 1250-1694 1250-1694 2. Replacement Calibration Load Parts QTY 1 2 2 C D 0 2 2 2 2 DESCRIPTION RESISTOR 51.1 1% .05W T

39、F TC=0+-100 C0NNECT0R-RF SMC M PC 50-0HM C0NNECT0R-RF SMC M PC 50-OHM A0APTER-C0AX STR F-SMA F-SMC ADAPTER-COAX STR F-SMA F-SMC r Copyright 1988 HEWLETT-PACKARD COMPANY Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A. 1 *31 HEWLETT nM PACKARD 3048A Option K23 0304892036

40、 Page 19 of 20 o CsLHfi n o- Q- . - O) R4 H o ) Q a Q 5 s. cs C9 5LS-b CRi dbcro y H t H w H CiO 5 5 5 SWi CP3 Ctl C12 .:. .:. Q Q- & C13 CM C15 o - C16 o Figure 5-5. Al Component Locator Diagram 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 K23 03048-92036 Page 20 of 20 8 CO o s 3 CO o o o e? b a? 5 I S s C D o a 8 c/ en Copyright 1988 - HEWLETT-PACKARD COMPANY - Spokane Division East 24001 Mission Avenue, TAF-C-34, Spokane, WA 99220 U.S.A.