Description
Specialty Microwave 4000A-70 1:1 TX Protection Switch 4000 Satcom Rackmount
This is a 1:1 transmitter protection switch designed for satellite uplink redundancy. It provides automatic or manual switching between a primary and backup transmitter, with integrated RF switching and system control in a 1U rackmount form factor.
Specifications & What's Included
- Type: 1:1 TX Transmitter Protection Switch
- Model: 4000A-70 | Manufacturer: Specialty Microwave Corporation
- Form Factor: Rackmount, 1U
- RF Connectors: 4x N-Type (IN 1, IN 2, ON-LINE, OFF-LINE)
- Control: D-Sub 25-pin (J1) and 9-pin (J2)
- Switch Modes: Auto / Manual / Test
- Power: 115/230VAC dual AC inputs (47-63Hz)
- Unit only; no cables included
Applications
TX protection switches of this type are used in satellite earth stations and telecom uplink facilities to provide transmitter redundancy. The 4000 series handles switching between active and standby satellite transmitters with automatic failover capability or operator-controlled switching. This equipment was widely deployed in SATCOM networks requiring high-availability uplink infrastructure.
This Specialty Microwave 4000A-70 1:1 TX Protection Switch has been inspected and is in good cosmetic condition overall. The unit powers on as shown in the photos — front panel LEDs illuminate including the +24V and PS indicators — but we are unable to test it further for full RF switching functionality. The chassis shows general age-related yellowing on the top cover consistent with years of rack service, and there is light surface soiling and scuffing on the panels. The rear N-type RF connectors (IN 1, IN 2, ON-LINE, OFF-LINE) and both D-Sub control connectors appear intact and undamaged. Both AC inlet/fuse assemblies are present and appear complete. No cables or accessories are included. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Specialty Microwave Corporation |
Model: |
4000A-70 |
MPN: |
4000A-70 |
Type: |
1:1 TX Transmitter Protection Switch |
SKU: |
50307 |
Series: |
Protection Switch 4000 |
Switch Configuration: |
1:1 (one primary, one backup transmitter) |
Application: |
Satellite Uplink / SATCOM TX Redundancy |
Switch Mode: |
Auto / Manual / Test |
Form Factor: |
Rackmount, 1U |
RF Connector Type: |
N-Type (4x: IN 1, IN 2, ON-LINE, OFF-LINE) |
Control Connectors: |
D-Sub J1 (25-pin), D-Sub J2 (9-pin) |
Power Requirements: |
47-63Hz, 115/230VAC dual AC inputs (AC1, AC2) |
Fusing: |
AC1: 2AT Fuse; AC2: 2AT Fuse |
Front Panel Indicators: |
+24V, PS1 Fail, PS2 Fail, Local, Remote |
Front Panel Controls: |
Lamp Test, Auto, Manual toggle switches |
Country/Region of Manufacture: |
United States |
Condition: |
Used – Powers On, Further Testing Limited |
Seller Notes: |
Unit only; no cables included. Powers on as shown in photos. |
Condition Notes: |
Specialty Microwave 4000A-70 1:1 TX Protection Switch powers on (LEDs illuminate) but cannot be tested for full RF switching functionality. Chassis shows age-related yellowing and light wear. RF and D-Sub connectors intact. No cables included. |
