Category: Instrumentation

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Vector Network Analyzer: Common Faults and Solutions”Vector Network Analyzer: Troubleshooting Guide and Repair Services for Various Brands and Models”Vector Network Analyzer: Common Faults and Solutions

I. Common Fault Phenomena

  1. Power Supply Faults:
    • Indicators: Front panel power indicator not lit, fan not rotating, network analyzer unable to start normally, or constant resetting due to unstable power supply voltage.
  2. Display Faults:
    • Manifestations: No display (black screen), scrambled screen, grayscale display. Possible causes include monitor failure, graphics processing board failure, or CPU failure.
  3. Local Oscillator Faults:
    • Issues: Local oscillator unlock, low local oscillator power resulting in high signal insertion loss, and poor local oscillator spectrum purity.
  4. Signal Path Faults:
    • Components affected: Input connectors, signal cables, attenuators, preselectors, frequency converters, intermediate frequency amplification/filtering, data acquisition and processing.
  5. Processor Faults:
    • Primarily involve processor hardware and program (software) faults, with the latter being more common.

II. Solutions

  1. Power Supply Fault Repair:
    • Check power cord connections and power outlets to ensure proper power supply.
    • Replace the power module or repair the power circuit if the power indicator is not lit or the fan does not rotate.
  2. Display Fault Repair:
    • Inspect display cable connections and related circuit boards for proper connection.
    • Replace the display or relevant circuit boards if the issue persists.
  3. Local Oscillator Fault Repair:
    • Examine local oscillator circuit boards and connections for damage or looseness.
    • Adjust the local oscillator circuit or replace relevant components if there is unlock or low power.
  4. Signal Path Fault Repair:
    • Check all components in the signal path, including input connectors, signal cables, attenuators, etc., for secure connections and proper functioning.
    • Replace or repair faulty components promptly.
  5. Processor Fault Repair:
    • Restart the instrument and check software settings for any program errors or configuration issues.
    • Reset the processor or reinstall software if the problem remains.
  6. Preventive Measures:
    • Ensure proper grounding to avoid electrostatic interference.
    • Read and follow instrument technical specifications and warning labels.
    • Pay attention to electrostatic protection, especially for exposed interfaces.
    • Maintain good instrument ventilation and avoid blocking air outlets.
    • When performing DC input, ground the equipment before connecting the power supply.

III. Brands and Models That Can Be Repaired

  1. Keysight Technologies (formerly Agilent Technologies):
    • 8753ET
    • ENA Series: E5061B, E5062A, E5063A, E5071B, E5071C, E5072, E5080A, E5080B
    • PNA Series: N5225A, N5225B, N5227A, N5227B, N5230C, N5230A, N5222A, N5221B, N5224, 5225BT, 5227, 5230C
    • PNA-X Series: N5247B, N5241A, N5241B, N5249A, N5249B
  2. Yi Zhuo Optoelectronic Technology (TFN):
    • Handheld Spectrum Analyzers: RMT714A, RMT716A, RMT717A, RMT719A, RMT720A, RMT740A, FAT130, FAT150, FAT750, FAT801, FAT811, FAT860 (5KHz-20GHz)
    • Antenna Feeder VSWR Testers: T300F, T300H (300KHZ-3GHZ)
    • 10G Ethernet Testers: T200K, T3000A, T5500A
    • Network Synthesis Testers: TT70-S1, TT70-S2, TT70-S3, TT70-S4
  4. Rohde & Schwarz:
    • ZNA Series: ZNA26, ZNA43, ZNA50, ZNA67
    • ZVA Series: ZVA8, ZVA14, ZVA24, ZVA40, ZVA50, ZVA67, ZVA110
    • ZVB Series: ZVB8, ZVB14
    • ZNB Series: ZNB20, ZNB26, ZNB40
  5. Anritsu:
    • MS4647B (ShockLine), MS46524B (ShockLine), MS46131A, MS4642B, MS4644B, MS4645B, MS4647A, MS46522A, MS46522B, MS46322, MS46121, MS46122
  6. Tektronix:
    • TTR500 Series: TTR500, TTR503A, TTR506A, MSO58LP, LPD64
    • RSA5000 Series: RSA5115B, RSA5103B, RSA5000-B40, RSA5000-VSA, RSA5000-EMI, RSA5000-AMK, RSA5000-PA
    • RSA6000 Series
    • RSA7000 Series: 7100A
  7. Copper Mountain Technologies:
    • Cobalt Series (e.g., S5180)
    • Planar Series (e.g., S5048)
    • R Series: R60, R140B, R180
    • Others: S5090, TR1300, M5045, M5065, M5090, M5180, S5045, S5065, S5085, S5180B, S5243, SC5065, SC5090, SN5090-6 to SN5090-16, C1209 to C4409, C1220 to C4220
  8. National Instruments (NI):
    • PXI Network Analyzer Series: PXI-2596, PXIe-5632, PXIE-8840
    • VirtualBench Multifunction Instruments: VB-8032, VB-8034, VB-8054, 783555-10
  9. RIGOL:
    • RSA5032, RSA5065-TG, RSA5000, RSA3000, RSA3015N, RSA3030, RSA3045N, RSA3030-TG, RSA3045, RSA3045-TG, RSA5032-TG, DSA815, DSA815-TG, DSA875, DSA875-TG, DSA832, DSA832-TG, DSA832E, DSA832E-TG, DSA705, DSA710
  10. CETC 41st Research Institute:
    • Siyi 3672 Series: 3672A, 3672B, 3672C, 3672D, 3672E
    • AV36580A: A new-generation vector network analyzer with multiple communication functions, automated testing capabilities, and wide test applications.
  11. Other Brands:
    • SAMZHE, Fluke, Spirant, Ideal Industries (USA)

Repair and Sales Services

Longi Electromechanical Company specializes in the repair of network analyzers (including wireless spectrum analyzers, antenna feeder VSWR testers, Ethernet testers, network synthesis testers, vector network analyzers, real-time spectrum analyzers, USB vector network analyzers) with nearly 30 years of experience. We provide quick repairs for various instruments and also offer sales and recycling of used network analyzers. Feel free to contact us for more information.

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Comprehensive Analysis of Spectrometers: Principles, Usage Methods, Common Faults, and Repair Techniques (Spectral Analyzer, Infrared Spectrometer, Raman Spectrometer, Fluorescence Spectrometer, Direct-Reading Spectrometer, UV-Vis Spectrometer, Fluorescence Spectrometer)

I. Spectrometer Fault Handling

  1. Invalid Detection, No Data Output:
    • Replace or upgrade the light source equipment.
    • Repair or clean the detector.
    • Realign the optical path.
    • Fault Causes: Insufficient light emission from the source, damaged or dusty detector, misaligned or shifted optical path.
  2. Optical Path Obstruction:
    • Clear the sample or optical path.
    • Check for damaged components or dust in the optical path and clean or replace as necessary.
    • Fault Causes: Sample residue in the optical path, blockages such as damaged components or dust.
  3. Vacuum Pump Not Starting:
    • Ensure consistency between pump and oil models, and regularly replace pump oil.
    • Adjust indoor temperature to avoid excessively low temperatures.
    • Check and manually start the pump motor via the analysis software.
    • Fault Causes: Poor viscosity or incorrect model of pump oil, temperature-related issues, control signal problems.
  4. Sudden Loss of Negative High Voltage:
    • Try unplugging and replugging the second ground wire of the control box; if unsuccessful, consider restarting the instrument.
    • Fault Cause: Vacuum value not rising for an extended period.
  5. Low Light Intensity:
    • Clean the condensing lens.
    • Clean the slit.
    • Replace the corresponding photomultiplier tube.
    • Fault Causes: Dirty condensing lens, dirty slit, degraded performance of the photomultiplier tube.
  6. Unstable Instrument Analysis Data:
    • Check and replace the rear fan of the instrument if necessary.
    • Fault Causes: Poor temperature control in the instrument’s vacuum chamber, faulty rear fan operation.
  7. Poor Communication Line Contact Leading to Computer Crash or Program Error:
    • Reconnect the communication line.
  8. Exhaust Blockage:
    • Replace the exhaust pipe with a transparent plastic tube and regularly purge the exhaust line.
    • Fault Causes: Blocked argon exhaust line, debris in the lower bend of the spark chamber, debris at the inlet of the argon filter.
  9. Power, Connection, or Software Issues:
    • Check for proper power connection, damaged or loose power cords.
    • Ensure correct and undamaged connection of cables.
    • If software issues occur, attempt reinstallation or updating.
  10. Other Maintenance and Calibration:
    • Regularly clean the optical components of the spectrometer and perform calibration to ensure accuracy.

Note: The above solutions are for reference only. For specific faults, it is recommended to contact Rongji Electromechanical for professional repair and support.

II. Supported Spectrometer Brands by Rongji Electromechanical

  1. Niton Spectrometers (Thermo Fisher Scientific):
    • Niton XL2, Niton XL2 Plus, Niton XL5 Plus, Niton DXL Precious Metal Analyzer, Niton XL2 100G General Metal Analyzer, Niton Apollo Handheld LIBS Analyzer.
  2. Yokogawa Spectrometers:
    • AQ6370, AQ6370B, AQ670C, AQ6370D, AQ6374, AQ6375, AQ6376, AQ6315E, AQ6317B, AQ6317C, AQ6319, AQ6330.
  3. Hitachi Spectrometers:
    • OE720, OE750, PMI-MASTER Smart, X-Supreme8000, LAB-X5000.
  4. HORIBA Spectrometers:
    • FluoroMax Plus, VS70-PDA-HDR, Duetta, Ultima Expert, MicroHR Series, MicOS, 1000M Series, HR Evolution, iHR320, XploRA PLUS XS, T64000, HE.
  5. Malvern Spectrometers:
    • Mastersizer 3000+ Ultra, Mastersizer 3000+ Pro, Mastersizer 3000+ Lab, Mastersizer 3000E.
  6. Beckman Coulter Spectrometers:
    • DU 640, DU 720, DU 730.
  7. Shimadzu Spectrometers:
    • ICPE-9000, ICPE-9800, ICPS-7000, ICPS-7510, ICPS-8100, EDX-LE Plus, EDX-GP, EDX-7200, EDX-8000, EDX-8100, IRSpirit, IRPrestige-21, PDA-5000, PDA-7000, PDA-8000, SolidSpec-3700, 3700DUV, RM-3000, RF-6000, UV-1900I.
  8. Thermo Fisher Scientific Spectrometers:
    • Nicolet Summit, ARL 3460, ARL 4460, ARLeasySpark, DXRxi, DXR, DXR™ 3, WDXRF, EDXRF, XRFXRD, ARL EQUINOX.
  9. Bruker Spectrometers:
    • VERTEX Series, ALPHA II, INVENIO, IFS 125HR, MPA II, TANGO, MATRIX-F, SENTERRA II, BRAVO, MultiRAM, RAM II, TXRF S4 TSTAR, S2 PICOFOX, M4 TORNADO, S1 TITAN, Q4 TASMAN, Q2, Q2L, Q8.
  10. Agilent Spectrometers:
    • Agilent 8453, Agilent Cary 60, Agilent Cary 100, Agilent Cary 300, Agilent 55, Agilent 4100 MP-AES, Agilent 710/715 Series, Agilent 5110.
  11. HORIBA Additional Models:
    • HR Evolution, iHR320, XploRA PLUS XS, T64000, HE.
  12. PerkinElmer Spectrometers:
    • Spectrum Two, Spectrum 3, PinAAcle 500, PinAAcle 900F.
  13. Tianrui Instruments:
    • EDX Series, SUPERXRF1050, Explorer8000 Series, SEE 100, SEE 200, ZSX Primus Series, XEPOS.
  14. Nanjing Sanxiang Spectrometers:
    • THICK800A, EDX4500H.

Longi Electromechanical offers long-term maintenance for various types of spectrometers, including infrared, Raman, fluorescence, direct-reading, UV-Vis, and more. With nearly 30 years of experience, we can quickly repair various instruments. Additionally, we recycle and sell used spectrometers. For more information, please contact us.