Keysight (Agilent HP) N5230C Repair Service

N5230C PNA-L Microwave Network Analyzer
Need your Agilent N5230C Network Analyzer repaired or calibrated? Our veteran-owned lab handles both, with free estimates and quick turnaround.
The PNA-L is designed for your general-purpose network analysis needs and priced for your budget. 300 kHz to 6 GHz, 2-port 300 kHz to 13.5 GHz, available in 2- and 4-port 10 MHz to 20 GHz, available in 2- and 4-port 10 MHz to 40 GHz, 2-port 10 MHz to 50 GHz, 2-port
N5230C
Any failures or unforeseen issues identified during the calibration phase will be detailed in an estimate submitted for your approval prior to any further action. Repair charges are determined by the actual time and materials required. Please be aware that customers are responsible for all associated shipping costs, to and from our location. This initial estimate is provided free of charge.
N5230C Specifications – click to expand

N5230C Specifications

  • PNA-family vector network analyzer
  • Windows-based with color display, LAN, USB and GPIB interfaces
N5230C Options – click to expand

N5230C Options

  • 200, 2-Port
  • 400, 4-Port
  • 010, Time Domain
  • 080, Frequency Offset
  • 082, Scalar Mixer Calibration
  • 083, Vector Mixer Calibration
Agilent / HP N5230C Error Codes – click to expand

Agilent N5230C Error Messages

The N5230C messages below are the ones that point to hardware, followed by what a failed performance test means on this model.

N5230C on-screen error messages

MessageMeaning and where to look
PHASE LOCK LOSTThe analyzer cannot phase lock the source. Check the A10 frequency reference board, the Frac-N/multiplier boards and the reference receiver path.
SOURCE UNLEVELEDThe ALC on the A16 test set motherboard is running open loop. Check the cables between the MASS (A17/A19, or A19 MASSQuad on 4-port units) and A16.
UNLEVELED, SOURCE 1 / SOURCE 24-port units with Options 146/246 only. Source 1 is leveled on A16 (check W31/W32 to the A19 MASSQuad); source 2 on the A17 QABC board (check W74/W75 to the A18 MASSQuad).

N5230C failed performance test – likely cause

Failed testWhat it points to
Source power accuracy / linearityRun the source calibration adjustment; if it still fails, the source (MASS) is suspect.
Source maximum power outputFollow the signal through the separation path (switch, couplers, attenuators) to find the loss.
Frequency accuracyMeasure the rear-panel 10 MHz REF OUT; more than about 10 Hz off calls for the 10 MHz reference adjustment.
Trace noiseRarely fails alone; run the receiver calibration adjustment, then suspect the A5 SPAM board.
Receiver compression / noise floor / dynamic accuracyPoints to the A20 mixer brick or the A5 SPAM board.
Calibration coefficientsTracking terms only: run the receiver calibration adjustment. Any other error term failing means a hardware fault.
System crosstalkLoose RF cable, or isolation loss in the receivers or the receiver/test set motherboard. Tighten all cables and receiver screws first.

SCPI error ranges

RangeClass
−100 to −199Command errors
−200 to −299Execution errors
−300 to −399Device-specific errors
−400 to −499Query errors

Hardware error on your N5230C? Analyzer Repair Inc. repairs and calibrates the Agilent N5230C in-house in Cocoa, Florida. Free estimate once the unit is in our lab. Contact us for service.

Based on the Agilent N5230A/C PNA-L Service Guides (N5230-90002 2-port, N5230-90013 4-port).

Agilent / HP N5230C Replaceable Parts – click to expand

Agilent N5230C Replaceable Assemblies and Part Numbers

Assembly-level part numbers for the N5230C. Check your options before ordering option-only parts.

ReferenceAssemblyAgilent part numberNotes
A1Keypad assemblyE8356-60001
A2Display assemblyE8356-60002
A3Front panel interface boardE8361-60061
A4Power supply assembly0950-4599
A5SPAM board, 2-portE8356-60194
A5SPAM board, 4-portE8364-60187
A6, A8Multiplier boardsE8364-601822 required
A7, A9Fractional-N synthesizer boardsE8364-601892 required
A10Frequency reference boardE8364-60136
A14System motherboard, 2-portN5230-60023
A14System motherboard, 4-portN5230-60086
A151.1 GHz CPU replacement kitE8364-60026Replaces E8364-60025
A16Test set motherboard, 2-portE8364-60181
A16Test set motherboard, 4-portN5230-60078
A17MASS 26.5, 2-port 20 GHz5087-7281Option 220/225; exchange 5087-6281
A18MA 26.5, 2-port 40/50 GHz5087-7280Options 420/425/520/525; exchange 5087-6280
A19MASS 50, 2-port 40/50 GHz5087-7278Options 420/425/520/525; exchange 5087-6278
A19MASS 26.5 (MASSQuad), 4-port5087-7294Exchange 5087-6294
A20Mixer brick, 2-port 20 GHz5087-7277Option 220/225; exchange 5087-6277
A20Mixer brick, 2-port 40/50 GHz5087-7279Exchange 5087-6279
A20Mixer brick (QuintBrick), 4-port5087-7822Exchange 5087-6822 (was 5087-7299)
A21, A22Test port couplers, 2-port 20 GHz5086-7968Option 220/225, serial prefix MY4500 and below
A21, A22Bridge couplers, 2-port 20 GHz5087-7716Serial prefix MY4640 and above
A21, A22Test port couplers, 2-port 40/50 GHz5086-7518
A21–A24Test port couplers, 4-port5087-73014 required
A25, A26Source step attenuators, 2-port33325-60012Options 225/425/525
A2560 dB source step attenuator, 4-port33321-60065Options 145/245
A17QABC board, 4-portN5230-60085Options 146/246
A29Reference switch with harness, 4-port5087-7714Options 146/246
A41Programmed hard disk driveE8364-60190For 1.1 GHz CPU
B1Fan3160-10853 required

Part obsolete? Many N5230C assemblies are no longer sold new. Analyzer Repair Inc. repairs N5230C boards and RF modules at the component level in Cocoa, Florida. Free estimate once the unit is in our lab. Contact us for service.

From the Agilent N5230A/C PNA-L Service Guides (N5230-90002 2-port, N5230-90013 4-port).

Located in: Network Analyzers