Keysight (Agilent HP) N5230C Repair Service
Product model
N5230C PNA-L Microwave Network AnalyzerServices
Description

Repair prices
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
| Message | Meaning and where to look |
|---|---|
| PHASE LOCK LOST | The analyzer cannot phase lock the source. Check the A10 frequency reference board, the Frac-N/multiplier boards and the reference receiver path. |
| SOURCE UNLEVELED | The 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 2 | 4-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 test | What it points to |
|---|---|
| Source power accuracy / linearity | Run the source calibration adjustment; if it still fails, the source (MASS) is suspect. |
| Source maximum power output | Follow the signal through the separation path (switch, couplers, attenuators) to find the loss. |
| Frequency accuracy | Measure the rear-panel 10 MHz REF OUT; more than about 10 Hz off calls for the 10 MHz reference adjustment. |
| Trace noise | Rarely fails alone; run the receiver calibration adjustment, then suspect the A5 SPAM board. |
| Receiver compression / noise floor / dynamic accuracy | Points to the A20 mixer brick or the A5 SPAM board. |
| Calibration coefficients | Tracking terms only: run the receiver calibration adjustment. Any other error term failing means a hardware fault. |
| System crosstalk | Loose RF cable, or isolation loss in the receivers or the receiver/test set motherboard. Tighten all cables and receiver screws first. |
SCPI error ranges
| Range | Class |
|---|---|
| −100 to −199 | Command errors |
| −200 to −299 | Execution errors |
| −300 to −399 | Device-specific errors |
| −400 to −499 | Query 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.
| Reference | Assembly | Agilent part number | Notes |
|---|---|---|---|
| A1 | Keypad assembly | E8356-60001 | |
| A2 | Display assembly | E8356-60002 | |
| A3 | Front panel interface board | E8361-60061 | |
| A4 | Power supply assembly | 0950-4599 | |
| A5 | SPAM board, 2-port | E8356-60194 | |
| A5 | SPAM board, 4-port | E8364-60187 | |
| A6, A8 | Multiplier boards | E8364-60182 | 2 required |
| A7, A9 | Fractional-N synthesizer boards | E8364-60189 | 2 required |
| A10 | Frequency reference board | E8364-60136 | |
| A14 | System motherboard, 2-port | N5230-60023 | |
| A14 | System motherboard, 4-port | N5230-60086 | |
| A15 | 1.1 GHz CPU replacement kit | E8364-60026 | Replaces E8364-60025 |
| A16 | Test set motherboard, 2-port | E8364-60181 | |
| A16 | Test set motherboard, 4-port | N5230-60078 | |
| A17 | MASS 26.5, 2-port 20 GHz | 5087-7281 | Option 220/225; exchange 5087-6281 |
| A18 | MA 26.5, 2-port 40/50 GHz | 5087-7280 | Options 420/425/520/525; exchange 5087-6280 |
| A19 | MASS 50, 2-port 40/50 GHz | 5087-7278 | Options 420/425/520/525; exchange 5087-6278 |
| A19 | MASS 26.5 (MASSQuad), 4-port | 5087-7294 | Exchange 5087-6294 |
| A20 | Mixer brick, 2-port 20 GHz | 5087-7277 | Option 220/225; exchange 5087-6277 |
| A20 | Mixer brick, 2-port 40/50 GHz | 5087-7279 | Exchange 5087-6279 |
| A20 | Mixer brick (QuintBrick), 4-port | 5087-7822 | Exchange 5087-6822 (was 5087-7299) |
| A21, A22 | Test port couplers, 2-port 20 GHz | 5086-7968 | Option 220/225, serial prefix MY4500 and below |
| A21, A22 | Bridge couplers, 2-port 20 GHz | 5087-7716 | Serial prefix MY4640 and above |
| A21, A22 | Test port couplers, 2-port 40/50 GHz | 5086-7518 | |
| A21–A24 | Test port couplers, 4-port | 5087-7301 | 4 required |
| A25, A26 | Source step attenuators, 2-port | 33325-60012 | Options 225/425/525 |
| A25 | 60 dB source step attenuator, 4-port | 33321-60065 | Options 145/245 |
| A17 | QABC board, 4-port | N5230-60085 | Options 146/246 |
| A29 | Reference switch with harness, 4-port | 5087-7714 | Options 146/246 |
| A41 | Programmed hard disk drive | E8364-60190 | For 1.1 GHz CPU |
| B1 | Fan | 3160-1085 | 3 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).
