The Power Distribution-Reference Sig, cataloged under National Stock Number 4920-01-571-5689, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Keysight Technologies Inc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-571-5689 |
| Primary Part Number | N4691A |
| Item Name | Power Distribution-Reference Sig |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Special Test Features | DISCONTINUED;CURRENTLY SUPPORTED UTIL 1 JUNE 2010;REPLACEMENT PRODUCT N4691B ELECTRONIC CALIBRATION MODULE,300KHZ TO 26.5GHZ,3.5MM,2-PORT GHz |
| Supplementary Features | ELECTRONIC CALIBRATION (ECAL) MODULE FOR VECTOR NETWORK ANALYZERS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| N4691A PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| N4691A | 3/9 Design control — primary reference Keysight Technologies, Inc. |
NSN 4920-01-571-5689 is a Power Distribution-Reference Sig, manufactured by Keysight Technologies Inc, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-571-5689 has 1 manufacturer part number on file: N4691A (Keysight Technologies Inc).
Key specifications for N4691A: Special Test Features: DISCONTINUED;CURRENTLY SUPPORTED UTIL 1 JUNE 2010;REPLACEMENT PRODUCT N4691B ELECTRONIC CALIBRATION MODULE,300KHZ TO 26.5GHZ,3.5MM,2-PORT GHz; Supplementary Features: ELECTRONIC CALIBRATION (ECAL) MODULE FOR VECTOR NETWORK ANALYZERS; Special Features: 2 PORT MW ELECTRONIC CALIBRATIO MODULE,3.5MM;USB INTERFACE FOR DIRECT CONTROL WITH PNA AND ENA SERIES OF NETWORK ANALYZERS;NIST TRACEABLE ACCURATE CALIBRATIONS MM; Part Name Assigned by Controlling Agency: MICROWAVE CALIBRATION MODULE. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.