O P E R A T I N G A N D S E R V I C E M A N U A L HP 11793A MIC R 0WAVE CONVERTER September 1990 11793-90011 111111111111111111111111111111111111111111111111111111111111l1l11 HEWLETT PACKARD
CERTlFlCATlON Hewlett-Packard Company certifies that this product met its published specifications ut the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other International Standards Organization members.
Agilent Technologies. Inc 24001 E Mission Liberty take, WA 99019 .'::is:. e , .*a*.. :: . . . www agilent corn Ag iIent TechnoIog ies Innovating the HP Way June 8,2000 Dear Customer, As of November 1, 1999, four of Hewlett-Packard's businesses, test and measurement, semiconductor products, health care solutions, and chemical analysis became a new company, Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of Agilent Technologies.
HP 11793A MICROWAVE CONVERTER SERIAL NUMBERS This manual applies directly to instruments with serial numbers prefixed 2520A. With changes described in Paragraph 31, this manal also applies to instruments with serial numbers prefixed 2407A. For additional important information about serial numbers, see INSTRUMENTS COVERED BY THIS MANUAL in Paragraph 4. First Edition OHEWLElT-PACKARD COMPANY 1985 EAST 24001 MISSION AVENUE, TAF C-34, SPOKANE, WASHINGTON, U.S.A., 99220 Operating and Service Manual Part No.
1 Regulatory Information (Updated March 1999) 1
Regulatory Information (Updated March 1999) Safety Considerations GENERAL This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation. This product has been designed and tested in accordance with IEC Publication 1010, "Safety Requirements for Electronic Measuring Apparatus," and has been supplied in a safe condition.
Regulatory Information (Updated March 1999) Safety Considerations for this Instrument WARNING This product is a Safety Class I instrument (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous. Intentional interruption is prohibited.
Regulatory information (Updated March 1999) To prevent electrical shock, disconnect instrument from mains (line) before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. Ventilation Requirements: When installing the product in a cabinet, the convection into and out of the product must not be restricted.
Safety Considerations Model SAFETY CONSIDERATIONS GENERAL This product and related documentation must be reviewed before operation for familiarization with safety markings and instructions. This product is a Safety Class I instrument (provided with a protective earth terminal). BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and the correct fuse is installed.
Model 11793A Microwave Converter MODEL 11793A IF INPUT CABLE (HP Part Number 11793-60006) FREQUENCY CONTROL CABLE (HP Part Number 8120-1838) -- LO INPUT CABLE (HP Part Number 11793-60009) LINE POWER CABLE Figure 1.
Model 1 1793A 1. Microwave Converter GENERAL INFORMATION This Operating and Service Manual contains information about initial inspection, operation, performance tests, adjustments, troubleshooting and repair of the HP Model 1 1793A Microwave Converter. 2, Specifications The HP 1 1793A Microwave Converter does not have "hard specifications" against which the instrument can be tested for performance standards or limits. Instead, the Local Oscillator (LO) Requirements are listed in Table 1.
Microwave Converter 3. Model 11793A Safety Considerations This product is a Safety Class I instrument; that is, one provided with a prctective earth terminal. The Microwave Converter and all related documentation must be reviewed before operation for complete familiarization with safety markings and instructions. Refer to the Safety Considerations page found a t the beginning of this manual for a summary of the safety information.
Model 11793A 6. Microwave Converter Options and Accessories Electrical Options The options are summarized in Table 3. The following list describes each option: Option 001. Adds an 18 to 26.5 GHz LO amplifier t o the standard instrument. Option 010. Moves the LO INPUT to the right side of the front panel. Option 011. Moves the LO INPUT to the right side of the front panel and adds the 18 to 26.5 GHz LO amplifier. Option 020. Moves all front-panel connectors to the rear panel. Option 021.
Microwave Converter Option 907 Front Handle Kit Model 11793A Option 908 Rack Flange Kit Option 909 Rack Flange and Front Handle Combination Kit Figure 2. Rack Mounting Options Accessories Supplied The accessories supplied with the Microwave Converter are shown in Figure 1. a. The line power cable may be supplied in several plug configurations, depending on the destination of the original shipment. Refer to the Paragraph 12 "Power Cables" in this manual. b. Fuses with a 0.
Model 11793A 7. Microwave Converter Recommended Test Equipment Table 4 lists the test equipment recommended to check, adjust, and troubleshoot the Microwave Converter. The Minimum Specifications column describes the essential requirements for each piece of test equipment. If substitute equipment is used, it must meet or exceed the minimum specifications. Table 4.
Microwave Converter Model 1 1793A 10. Power Requirements The Microwave Converter requires a power source of 115, 230 Vac (+lo%,-20%),48 to 66 Hz. Power consumption is 20 VA maximum. 11. Line Voltage Selection Before the instrument is plugged in, it must De set to the voltage of the power source, or damage to the instrument may result. A line voltage switch enables selection of either 11SV or 230V. The line voltage is indicated on this rear-panel switch.
Model 1 1 7 9 3A Microwave Converter z!q Table 2-2. AC Power Cables Available I Number I I:".
Microwave Converter Model 11793A 14. Operating Environment The operating environment should be within the following limitations: Temperature .......................... 0°C to +55"C Humidity .............................. ~ 9 5 relative % a t 40°C Altitude ............................... 44570 meters (1 5 000 feet) 15. Bench Operation The instrument cabinet has plastic feet which are shaped to insure self-alignment when stacked in a system configuration. 16.
Model 11 793A c. Microwave Converter Use enough shock-absorbing material; a 7.5 to 10.0 cm ( 3 to 4 in.) layer around all sides of the instrument to provide a firm cushion and to prevent movement in the container. Protect the front panel with cardboard. d. Seal the shipping container securely. e. Mark the shipping container FRAGILE to ensure careful handling. 19.
Microwave Converter Model 11793A FREOUENCY OFFSET MODE INPUT I HP 6 9 0 2 A MEASURING RECEIVER FREPUENCY OFFSET TTL OUTPUT ::::: D00000 I 0 0 0 0 0 000000 0 0000 0 0 0000 0 0000 00000 Q RF INPUT SI II OR 1 I Figure 3. Microwave Convertor Interconnections and Typical T e s t S e t u p 21. Panel Features Front-panel features consist of the LO input, RF input, and the IF output connectors. For Options 020 and 021, the connectors are located on the rear panel.
Model 11793A Microwave Converter IF OUTPUT: The IF output, Type-N connector, couples the IF output signal into measuring instrument RF input. LO INPUT: The LO input, 3.5 mm connector, couples an external oscillator signal source to the instrument. RF INPUT: The RF input, 3.5mm connector couples the microwave input signal into the instrument. The maximum allowable input power is +30 dBm (lwatt), the input impedance is 50 ohms nominal. Figure 4.
Model 1 1793A Microwave Converter 24. Performance Tests Description Performance testing consists of a general functional check to verify the instrument down-converts and switches RF paths properly. Since the Microwave Converter is designed to operate with specific HP instrumentation, no substitution is recommended. Equipment Measuring Instrument ................. HP 8901B or HP 8902A Sensor Module ......................... HP 1 17 9 2A Microwave LO Source .................
Model 11793A Microwave Converter Table 6.
Microwave Converter Model 1 1793A 28. Parts List Updating (Manual Changes Supplement) Production changes to the instrument made after the publication date of this manual are denoted by a change in the serial-number prefix. Changes to the parts list are recorded by serial prefix on a Manual Changes supplement. Also, errors in the manual are noted in the Errata portion of the Manual Changes supplement. 29.
Model 1 1 7 9 3 A I Reference Designation HP Part Number 1 I A1 1 11793-6000: 4 RlCl R1C2 8 1 RlC3 RlC4 RlC5 0120-0197 0180-2302 1400-0249 0180-1794 0160-5098 0160-5098 0 3 6 3 A1C6 R1C7 R1C8 0160-5098 0160-4832 0160-5555 6 4 0 1 Mfr Code Description ItY R1 6 Replaceable Parts Table 7. Replaceable Parts SWITCH CONTROL RSSEMBLY 1 1 1 1 1 CRPRCITOR-FXD CRPRCITOR-FXO CRPRCITOR-FXD .22UF +-lo% 5CVDC CER . O l U F +-lo% lOOVDC CER .
Model 11793A Replaceable Parts Table 7 .
Replaceable Parts Model 11793A Table 7. Replaceable Parts Reference Designation 2401AOWLY HP P a r t Number 3 - RERR FRRME SCREW-MRCH M3 X 0 . 5 6MM-LG PAN-HD THREROEO INSERT-NUT M3X0.
Replaceable Parts Table 7. Replaceable Parts Reference Designation u1 U2 u3 HP P a r t Number 3 7 0520-0130 0955-0237 0520-0133 2190-0045 2950-0132 1 0955-0217 0515-0680 2190-0584 3050-0891 6 5 0 7 0 4 8 1 11793-20002 1 w2 11793-20003 2 M f r P a r t Number RMPLIFIER-MICROWRVE FREQ RRNGE: l8GHZ TO (OPTIONS 001, 0 1 1 RND 0 2 1 ONLY) SCREW-MRCH 2-56 . 3 7 5 - I N - L G PRN-HO-PO21 MOD. SMR AMPLIFIER-RF __ __ SCREW-MRCH 2-56 . 5 - I N - L G PRN-HO-PO21 WRSHER-LK HLCL NO. 2 .
Model 1 1793A Microwave Converter Table 8.
Model 11793A Microwave Converter MP8 \ \ \ 7P M MPlO MP12 NOTE: MP21 AND MP22 ARE HOLE PLUGS. Figure 6.
Model 11793A Microwave Converter J1 \ W1 (Standard) W19 (Option 010) W17 (Option 020) MP25 \ u3 (Under MP18) MP18 MP25 W3 AT1 W2 MP25 J2 \ \ \ I l l / / / J3 52 MP14 w10 MPl5 (Gasket) J10 w7 W8 w12 u2 A1 MP13 W13 MP16 MP20 f11 T1 F1 Figure 7 .
Microwave Converter J1 (1 Dption 001 only) W4 (Option 001 only) J4 (I3ption 011 only) W14 (Option 011 only) J6 (I3ption 021 Model 1 1 793A W6 I u1 I MP18 / u3 (Under W3 / W2 / J2 / / 52 s1 / MP14 W8 ,w11 MP15 (Gasket) eJ11 ,w 7 A1 u2 MP13 f11 MP20MP16 W13’ T1 F1’ Figure 8.
Model 11793A Microwave Converter 30. Ordering Information To order a part listed in the replaceable parts table, include the Hewlett-Packard part number (with the check digit) and the quantity required. Address your order to the nearest Hewlett-Packard office. The check digit will ensure accurate and timely processing of your order.
Model 1 1793A Microwave Converter Service Sheets 1 and 2 (Input Signal Down-Converter) A single input on the rear panel: the FREQ OFFSET INPUT, has three logic states which control both the switching of the RF two paths, and the insertion of the optional LO Amplifier. The Level Comparator senses the three states and drives the appropriate switches. Service Sheets 1 and 2 are the schematic diagrams of the RF circuitry of the Microwave Converter.
Model 11793A Microwave Converter 34. Troubleshooting Primary AC power is present within instrument when line voltage power cord i s connected to the instrument. Maintenance described herein is performed with power supplied to the instrument and with protective covers removed. Such maintenance should be performed only by service-trained personnel who are aware o f the hazards involved. Use the correct torque wrench when installing sub -miniature connectors.
Model 1 1793A Microwave Converter RF Devices (Service Sheets 1 and 2) Because of the diversity of test equipment and techniques available for troubleshooting the high-frequency devices, no specific procedures are given. Check the performance parameters of the RF devices against the following table, Table 10. Also check connectors and cables. Table 10. Performance Parameters Device AT1 3 dB Attenuator Performance Parameters to Check Attenuation: 2.5 to 3.5 dB at 18 GHz 2.0 to 4.0 dB at 26.5 GHz SWR: 4.
Model 11793A Microwave Converter Equipment Refer t o Table 4, Recommended Test Equipment. 35. Repair Cleanliness Do not handle the A1 Switch Control Assembly ,,oard more than necessary. If dirt or moisture from the hands comes in contact with the circuit side of the A1 board, the circuits may become inoperative. Do not use solder flux remover on the circuit board. 36.
Microwave Converter Model 11793A 4. Insert the paper under one of the contacts, and while pressing gently on the contact, slide the paper through. Do not allow the alcohol to run inside the switch assembly. Do not allow the paper to shred. Do this several times and repeat for the other switch contact. 5. Saturate the edge of another sheet of paper with a freon-type degreaser and repeat step 4. 6. Remove any shreds of paper that may have lodged in the contacts. 7. Reinstall the switch cover.
Model 11793A Microwave Converter 6. Turn the instrument around so that the front of the instrument faces to the operator's left. Desolder the 6, 5, 4, and 0 (blue, green, yellow, and black) wires from the A1 assembly. 7. To remove T1 power transformer and its mounting bracket, unscrew the four screws located on MP20 (mounting bracket). Separate transformer and the mounting bracket by removing the four long screws passing through the transformer case. 8.
Microwave Converter Model 11793A 1. Place the RF Module upside down with the semi-rigid coax cables pointing to the left. Position the main deck over the module with the four holes in the deck aligning with the four screw holes in the module base. (The A1 assembly mounting stand-offs on MP13 (main deck) should be upside down and on the opposite side of MP 13 from the assembler.) Attach with four screws. 2.
Model 11793A Microwave Converter 13. Replace the side panels by centering each panel in the track formed by the side strut edges. Slide the panel from the rear forward until the captive screw on the rear edge of the panel is in contact with the rear frame. The screw should be in position to be tightened into the frame. The panel will move forward into place as the screw is tightened. 14.
Microwave Converter Model 11793A 12. Remove S2 from MP14 module base by removing the two corner screws. 13. Unsolder the three control wires (1, 2, 5) from S2. 14. Remove the Spira Shield (RF "EMI" gasket situated in the module base lip) only if damaged, or replacement of MP14 module base. 40. RF Module Disassembly Procedure for Option 001, 011, & 021 Instruments NOTE When referring to switch ports: port # I is the f a r left ( S M A ) connector, port # 2 is the second S M A connector, etc.
Model 11793A Microwave Converter 13. Disconnect W 2 from S2, port #3, being careful not to bend, crimp, or kink the cable. 14. Disconnect W3 from S2, port #2, being careful not to bend, Lrimp, or kink the cable. 15. Disconnect AT1 from S2, port #l. 16. Remove switches S1 and S 2 from MP14 module base by removing the two screws that secure each switch. 17. Unsolder the control wires on each switch (6, 4,& 92 on SI; 5, 1, & 2 on S2). 18.
Microwave Converter Model 1 179 3A 7. Attach the mixer assembly to the module base, but do not tighten the screws. 8. Tighten the connection to AT 1, then tighten the Mixer assembly screws. 9. Connect W 1 (in Standard instruments), W 19 (in Option 01 0 instruments), or W 17 (in Option 020 instruments) to the right port of the mixer (cable slots in module should be facing assembler).
Model 11793A Microwave Converter NOTE Mixer construction varies with manufacturer, and thus, is assembled within the RF Module differently. For example, a Norsa2 mixer has a stiffener bar placed between the mixer mounting bracket and the base mounting castings. An RHG mixer has a stiffener bar placed above the mixer mounting bracket. Attach the mixer assembly to the module base, but do not tighten the screws. Tighten the connection to AT1, then tighten the mixer assembly screws.
MICROWAVE SIGNAL DOWN-CONVERSION L E l INPUT CONTROL ASSEMBLY I r-- -- I I I 1 I I I --1 ' I I "_. I t26V FULL WAVE RECTIFIER POWER TRANSFCRHER 0 - -- II t12v REGULATOR t5v REGULATOR -- -- t5v I UNREGULATED t12v I I BD 1 F i g u r e 10.
(NOTE 11 -> 10 A 1 SWITCH CONTROL J9 7 >i 1 !!?_' ? , INPUT SIQNAL DOWN CONVERTER JiO ' w10 5 ( 7 i26V TO SWITCHES S I G N A L OIRECT PATH t S I G N A L OOHN CONVERT PATH t 1 2 V TO A M P L I F I E R S NC ' ( 9 t NC J? 010 ONLY1 NOTES I.+ I Ill NC S2 RF INPUT SWITCH I [NOTE 31 (NOTE 31 1 . A L L C I R C U I T R Y EXCEPT W12 IS ENCASE0 I N A R . F . I . S H I E L D E D MOOULE. 2 . J9 AN0 J l O ARE PART OF Y 1 2 AN0 H i 0 RESPECTIVELY.
INPUT (NOTE 11 I t 2 6 VOC T O SUITCHES 5 > 1 I S I G N A L DIRECT PATH I SIGNAL DOWN CONVERTER S2 RF INPUT SWITCH LO AMP OUT PATH LO A M P L I F I E R I N PATH CI ( I 01 GND 1- c23 8 S I G N A L DOWN CONVERT PATH T I NOTES I - BOO HHz F L l LOU PASS FILTER A T 1 340 ATTENUATOR 1 . A L L C I R C U I T R Y EXCEPT W12 IS ENCASE0 I N A R . F . I . S H I E L O I N G MODULE.
01 01 BOTTOM VIEW TOP VIEW -- -- SWITCH CONTROL ASSEMBLY ( 1 1 7 9 3 - 6 0 0 0 1 ) I-A1 NOTES -- -- -- -- --1 TO RF s w c ii E S 2,3 C A T H 0 0E IANOOEI VR3 TOP VIEY VR3 BOTTOM VIEW (j 3 (CASE1 VR4 TOP VIEW ss3 F i g u r e 14.
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