Description
Genuine OEM Factory Order Option UHF Duplexer for MOTOTRBO SLR 1000
Motorola factory-configurable internal UHF cavity duplexer option (430–480 MHz, 5 MHz split) enabling single-antenna operation for new SLR 1000 repeater builds.
IMPORTANT ORDERING REQUIREMENT: Motorola GA01590AA is a manufacturer factory order option code that must be ordered concurrently with a new Motorola MOTOTRBO SLR 1000 repeater. It represents the factory-installed internal duplexer selection during initial repeater provisioning and cannot be fulfilled as a standalone item under this part code. (If you already own an SLR 1000 and require a replacement or aftermarket standalone duplexer, order physical service part number HKFE4001A).
The Motorola GA01590AA (physical replacement part number HKFE4001A / base part HKFE4001) is an authentic original equipment manufacturer (OEM) internal UHF cavity duplexer engineered specifically for the MOTOTRBO SLR 1000 digital base station repeater. Operating across the 430–480 MHz frequency range with a required 5 MHz transmit-to-receive frequency separation, this internal filtering component allows the SLR 1000 to simultaneously transmit and receive over a single shared external antenna without signal degradation.
Because full-duplex repeaters transmit and receive at the same time, high-power transmitter energy can easily overpower and desensitize the repeater’s sensitive receiver. The Motorola GA01590AA provides the necessary sharp bandpass and notch isolation between the transmit and receive RF paths, protecting receiver sensitivity while consolidating both paths onto a single transmission line and antenna. Selecting this factory option ensures your new SLR 1000 arrives fully integrated, pre-cabled within the IP65 sealed chassis, and tuned to your FCC-licensed frequency pair under commercial FCC Licensing regulations.
Key Features & Benefits
-
Factory-Configured SLR 1000 Option: Provisioned and integrated directly at the factory when ordering a new MOTOTRBO SLR 1000 repeater.
-
Single-Antenna Repeater Operation: Combines transmit and receive RF paths onto one antenna, eliminating the need, space, and cost for dual antennas and vertical separation.
-
430–480 MHz UHF Operating Band: Engineered for commercial UHF systems operating within the 430–480 MHz range with a mandatory 5 MHz frequency split.
-
Superior RF Isolation: Protects the repeater receiver from transmitter desensitization and intermodulation interference during continuous-duty transmissions.
-
Internal Chassis Integration: Mounts cleanly inside the SLR 1000 weather-sealed casing, preserving the unit's compact, IP65 environmental rating.
-
RoHS Compliant Construction: Built to strict environmental and industrial manufacturing standards for long-term operational reliability.
Specifications
| Attribute |
Details |
| Brand |
Motorola Solutions |
| Ordering Option Number |
GA01590AA (Must Be Ordered with SLR 1000) |
| Physical Service Part Number |
HKFE4001A / HKFE4001
|
| Product Type |
Internal Repeater UHF Cavity Duplexer |
| Application |
MOTOTRBO SLR 1000 Base Station Repeater |
| Frequency Range |
430–480 MHz |
| Frequency Separation (Split) |
5 MHz (Fixed Tx/Rx Frequency Separation) |
| Environmental Compliance |
RoHS Compliant |
| Mounting Architecture |
Internal Chassis Bracket Mount |
| Integrated GPS |
No |
| Operating Temperature |
-30°C to +60°C (-22°F to +140°F) |
| Operating Mode Compatibility |
Conventional Full-Duplex Repeater Operation |
Compatibility
Compatible Motorola Repeater Systems
What’s Included
| Description |
SKU/Model |
Status |
| Motorola SLR 1000 UHF Duplexer (Factory Configured) |
GA01590AA (HKFE4001A) |
Included with System Order |
| Internal RF Coaxial Interconnect Cables & Mounting Hardware |
Integrated Kit |
Included with System Order |
Recommended Accessories
Repeater Antennas & Hardware
Repeater Programming & Mobile Fleet Hardware
More Resources
Frequently Asked Questions
Can I purchase the Motorola GA01590AA as a standalone part?
No. GA01590AA is a factory ordering option code that must be selected when ordering a new Motorola MOTOTRBO SLR 1000 repeater. If you already have an SLR 1000 and need an aftermarket standalone or replacement duplexer, purchase physical part number HKFE4001A.
What frequency split is required for this duplexer?
The GA01590AA / HKFE4001A requires an exact 5 MHz frequency separation between your transmit and receive frequencies (e.g., Tx 462.700 MHz and Rx 467.700 MHz). Both frequencies must fall within the 430–480 MHz window.
Does the duplexer require manual frequency tuning?
Yes. Cavity duplexers must be precision-tuned to your system's exact licensed transmit and receive frequencies. When ordered as a factory option with an SLR 1000 build, provide your assigned frequency pair so the unit can be properly aligned prior to deployment.
Can this duplexer be used with Extended Range Direct Mode (ERDM)?
No. Extended Range Direct Mode requires an internal antenna switch (option code GA01592AA) rather than a duplexer. Motorola specifies that the internal duplexer and antenna switch options are mutually exclusive.
What are the alternative duplexer options for other UHF bands?
If your assigned frequencies fall outside the 430–480 MHz range, Motorola offers alternative options:
-
GA01589AA (HKFE4000A) for 410–430 MHz (with a 5 MHz split)
-
GA01591AA for 480–527 MHz (with a 5 MHz split)
Warranty
1-year manufacturer’s replacement warranty.
