Related Manuals for Agilent Technologies 85301B
Summary of Contents for Agilent Technologies 85301B
- Page 1 Agilent 85301B/C Antenna Measurement Systems 45 MHz to 110 GHz Configuration Guide...
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Page 2: Table Of Contents
How to use this guide General range parameters Transmit site configuration Range transfer function Required measurement sensitivity Selecting the system 85301B Antenna Measurement System System configurations Selecting the LO source Reference signal level Calculating reference power Interconnect cables RF cable ordering information... -
Page 3: Introduction
If you choose to use NSI’s services, you will not Guide will help you configure a custom Agilent need to use this configuration guide; NSI will care- Technologies 85301B or 85301C antenna measure- fully consider all the issues covered in this configu- ment system that meets your measurement ration guide. -
Page 4: How To Use This Guide
• Determine RF cable losses and transmit power based on range type. 5. Select either an 85301B or 85301C antenna mea- • Decide how the reference channel signal will be surement system depending on range type and obtained. - Page 5 Table 1. Agilent 85301B/C compatible transmit sources Transmit site RF cabling The transmit site RF cabling will depend on the Model Output transmit amplifier and the method used to obtain Number Description Power (dBm) the reference channel signal. The amplifier should...
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Page 6: Range Transfer Function
If a coupled reference is chosen, one or more Range transfer function directional couplers must be chosen to cover the The range transfer function (P ) of an antenna desired frequency range. Table 2 lists typical cou- range determines the difference in power levels pler parameters. -
Page 7: Required Measurement Sensitivity
The test channel received power level, Pr (TEST), Measurement accuracy is also affected by the mea- must be calculated to determine the approximate surement sensitivity of the system. The signal-to- maximum power level present at the output of the noise ratio will directly impact the measurement antenna-under-test (AUT). -
Page 8: Selecting The System
(uses 8511A/B frequency converter) Select 85301B system Outdoor range (uses 85310A frequency converter) Figure 3. Selecting an antenna measurement system Table 3. Performance of an 85301B system (with 85310A distributed frequency converter) 85320A/B 85320A/B 85320A/B Option H20 mixers standard mixers... - Page 9 8511A/B RF inputs and the AUT. The 85301C system has a low-frequency limit of 45 MHz; the 85301B has a low-frequency limit of • Measurement sensitivity and acquisition time 100 MHz. are directly related. If averaging is used to...
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Page 10: 85301B Antenna Measurement System
Agilent 85301B Antenna Measurement System The Agilent 85301B antenna measurement system RF In 3.5 mm male uses the Agilent 85310A distributed frequency con- 85302B RF In Reference 3.5 mm 85320A verter to downconvert the microwave signal to an Mixer male... - Page 11 In Figure 6, the transmit source and 8530A are located in the control room and a synthesized LO source, 85310A frequency converter and GPIB extender are located on the rail cart with the posi- tioning system and AUT. The GPIB extender cable, together with coaxial cables transmitting the refer- ence and test IF signals, are fed from a spool mounted on the rail cart.
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Page 12: Selecting The Lo Source
0.1 to 18 GHz will be adequate for all fre- 37204A Reference and GPIB Positioner Test IF Signals quencies of operation of the 85301B. A large selec- Extender To Control LO Source Room tion of synthesized sources is available for LO... -
Page 13: Reference Signal Level
Select a source that meets your individual prefer- Radiated reference signals ences and needs. The higher-output power sources When using a radiated reference, the reference are useful when the distance between the LO source channel power level can be determined from the and the 85309A LO/IF, distribution unit is longer following equation: than the standard allowable cable lengths shown... -
Page 14: Interconnect Cables
(refer to nals between the 85309A LO/IF unit, 8530A, mixer Figures 12 and 13). Therefore the maximum LO modules and the LO source. Agilent Technologies frequency utilized will affect the maximum length has several different types of cables available to of the cables. - Page 15 The following figures and tables define the allow- levels required for proper operation with the able cable lengths between the LO source and 85320A/B mixers. Table 6 shows the maximum 85309A LO/IF distribution unit, and between the allowed 85381A/C cable lengths from the LO source 85309A and the mixers.
- Page 16 Maximum cable lengths with 2 to 50 GHz mixers 85320B-H50 Reference Agilent Technologies offers 85320A/B Option H50 Mixer mixers that operate from 2 to 50 GHz with a single = 12 dBm P Out = 19 dBm 83620B 85309A LO/IF 2.4-mm coaxial connector at the RF input port.
- Page 17 Figure 11 shows the RF power levels required for Maximum cable lengths with low-frequency mixers Agilent Technologies offers 85320A/B Option H20 proper operation with the 85320A/B-H20 mixers. mixers that operate from 0.1 to 3 GHz. These mix- Table 10 shows the allowed 85381A/C Cable...
- Page 18 Agilent 85381 series coaxial cables 0.61 The 85381A microwave cable is a semi-flexible cable that operates from DC to 18 GHz. It is 0.46 intended for use as an LO cable between the LO 85381A 85381C source and the 85309A LO/IF unit (see Figure 11). If a rotary joint is used to route the test LO and IF 0.30 signals so that the cable is not continuously flexed,...
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Page 19: Rf Cable Ordering Information
RF cable ordering information Cable ordering example: To obtain a 23-foot cable for use up to 18 GHz with Cable length a Type-N male connector on one end and an SMA Determine the type and length (in meters) of cable male connector on the other end, order an 85381A required. - Page 20 Rotary joints When a rotary joint is used, the equivalent cable length must be added to the reference mixer LO cable due to the rotary joint insertion loss. To determine the equivalent cable length, first deter- mine the insertion loss from the input to the output of the rotary joint at the maximum LO frequency.
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Page 21: 85301C Antenna Measurement System
Agilent 85301C Antenna Measurement System The Agilent 85301C antenna measurement system Radiated reference signals uses either an 8511A (45 MHz to 26.5 GHz) or an If a radiated reference is used, determine the 8511B (45 MHz to 50 GHz) frequency converter for length of cable B4 and record it in Figure 19. -
Page 22: Coupled Reference Signals
Coupled reference signals For extremely long ranges, telephone line modems can be used in conjunction with a leased telephone When using a coupled reference, the reference line to provide communications between the trans- phase-lock power level can be determined by sub- mit site and the receive site. -
Page 23: Optional Capabilities
Manual antenna measurements as angular sampling increment, can be selected from the front panel of the microwave receiver. The 85301B/C antenna measurement systems can be operated in a manual mode. Manual operation Synchro encoder operation is not compatible allows the operator to rotate the antenna under with pulsed operation. -
Page 24: Measurement Automation Software
Measurement software for errors in phased-array antennas. 85301B/C systems is provided by Agilent Technologies’ channel partner, Nearfield Systems, Indicate the type of antenna measurement Inc. (NSI). NSI offers both far-field and near-field automation software desired on Figure 20. - Page 25 The Agilent 11970 series mixers used in the 85325A Also available for extending the frequency coverage millimeter-wave source modules all operate in a of the 85301B system are millimeter-wave subsys- harmonic mode with a 3 to 6.09 GHz LO signal. tems, which provide millimeter expansion capability for the standard 85301B system.
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Page 26: Multiple Test Channel Configuration
40 GHz, to measure all of the test ports during one rotation where solid-state PIN switches are not readily of the antenna. Agilent Technologies offers two dif- available ferent multiple-channel measurement configura- tions: internal IF switching and RF switching. -
Page 27: Antenna Positioning Systems
Scientific-Atlanta 4139 positioner controllers. These control a wide variety of synchro-based Indicate if RF switching capability is desired. positioners, allowing the 85301B/C systems to be integrated with almost any positioning system. If a Indicate if PIN switching is required on the... - Page 28 Steps 41, 42 and 43 are referenced in Figure 24. Indicate if an existing model tower or roll axis positioner is available or required for this system. Indicate if a polarization axis positioner is A model tower is sometimes used for mounting required on the source antenna side of the anten- antennas above the metal AUT positioner.
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Page 29: Configuration Diagrams
Configuration Diagrams Customer: Address: Customer contact: Telephone: FAX: Sales engineer: Location: Telephone: FAX: Agilent systems engineer: Location: Telephone: FAX: Date: ❏ New antenna range or ❏ Upgrade of existing range Objective: Antenna range parameters Select either far- or near-field range ❏... - Page 30 RADIATED REFERENCE A1 _____ meters P t = _____ dBm A3 _____ meters TRANSMIT ANTENNA GAIN _____ dBi TRANSMIT AMPLIFIER COUPLED REFERENCE Frequency Range _____ GHz Insertion Loss ____ dB Gain _____ dB P t = _____ dBm Output Power _____ dBm Input Power _____ dBm...
- Page 31 LO/IF Unit (From Transmit Site) 37204A LO SOURCE B1 _____ meters GPIB Extender Type _________ (Check One) ❏ 83620B C5 _____ meters ❏ 83622B ❏ 83623B ❏ 83624B Figure 18. Configuration block diagram for 85301B antenna measurement system receive site...
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Page 32: Measurement Automation
Test Antenna Est. Gain _____ dBi B3 _____ meters B1 _____ meters B4 _____ meters Reference Antenna Rotary Gain _____ dBi Joint Loss _____ dB Cabled Reference (From Transmit Site (A5)) B2 _____ meters 8530A P r (REF) = _____ dBm Microwave Receiver 8511A/B... -
Page 33: Millimeter-Wave Subsystem
85325A Option 001 Millimeter-wave capability beyond 50 GHz is needed. Complete this page. Millimeter-wave frequency coverage can be added to an 85301B antenna system by adding an 85326A millimeter-wave interface kit and the 11970 Series appropriate 85325A millimeter-wave subsystem kit. -
Page 34: Multiple-Channel If Switching Configuration
Optional IF switching capability is desired. Third Test Channel Standard configuration: 85320A One reference and one test mixer; 7m cables; 85309A has one reference and one test channel. Option 001: add one additional test channel. Optional One reference and two test mixers; 7m cables; 85309A has Second Test Channel one reference and two test channels. -
Page 35: Positioner Configurations
Polarization Axis Postioner Polarization axis positioner is not required Utilize existing polarization positioner; model #:______ Low-speed, high-accuracy polarization positioner is required High rotation speed, low-positioning accuracy polarization positioner is required Source Polarization Control Cables Antenna Polarization control cables are not required Utilize existing polarization control cables Polarization control cables are required;... - Page 36 By internet, phone, or fax, get assistance with all your Agilent Technologies’ Test and Measurement test and measurement needs. Support, Services, and Assistance Agilent Technologies aims to maximize the value you receive, Online Assistance while minimizing your risk and problems. We strive to ensure www.agilent.com/find/assist that you get the test and measurement capabilities you paid for and obtain the support you need.