1. Introduction
This manual provides instructions for the installation, operation, and maintenance of your Parts Express Coaxial A/B Switch. This device allows you to easily switch between two different 75 ohm F-type coaxial input sources, such as a cable television connection and an antenna, to a single output device like a television or VCR.
Key Features:
- Switches between two 75 ohm F-type coaxial inputs.
- Provides 75 dB isolation for clear signal separation.
- Durable construction for reliable performance.
2. Setup and Installation
Before installation, ensure all connected devices (television, cable box, antenna) are powered off.
- Identify your input sources (e.g., cable line, antenna coaxial cable) and your output device (e.g., television, VCR).
- Connect the first input source coaxial cable to one of the "IN" ports on the A/B switch.
- Connect the second input source coaxial cable to the other "IN" port on the A/B switch.
- Connect a coaxial cable from the "OUT" port of the A/B switch to the coaxial input of your television or other receiving device.
- Secure all F-type connectors by hand-tightening them. Avoid over-tightening.
- Mount the switch in a convenient location using the integrated mounting tabs, if desired.

Image: Front view of the Parts Express Coaxial A/B Switch, showing the "IN" and "OUT" ports, and the "ANTENNA/CABLE SWITCH" lever.
3. Operation
The Parts Express Coaxial A/B Switch is designed for simple manual operation.
- After connecting all devices as described in the "Setup and Installation" section, power on your television and other receiving equipment.
- To select between your two input sources, move the lever on the front of the switch to the desired position. One position will correspond to "CABLE" and the other to "ANT" (Antenna).
- If your television has a tuner mode setting (e.g., "Cable" or "Antenna"), ensure it matches the selection made on the A/B switch for optimal signal reception. You may need to rescan channels on your TV after switching sources, especially if your TV does not automatically detect the input type.
4. Maintenance
The Parts Express Coaxial A/B Switch requires minimal maintenance.
- Keep the switch clean and free from dust. Use a soft, dry cloth for cleaning.
- Ensure all coaxial connections remain secure. Periodically check and re-tighten if necessary.
- Avoid exposing the switch to extreme temperatures or moisture.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No signal or snowy picture | Loose connections | Check and tighten all F-type coaxial connections. |
| No signal or snowy picture | Incorrect switch position | Ensure the switch lever is set to the correct input source (Cable or Antenna). |
| No signal or snowy picture | TV tuner setting mismatch | Verify your television's tuner input setting (e.g., "Cable" or "Antenna") matches the switch's selection. You may need to rescan channels on your TV. |
| Poor picture quality | Damaged coaxial cable | Inspect coaxial cables for damage. Replace if necessary. |
| Poor picture quality | Signal interference | Ensure the switch is not placed near strong electrical interference sources. |
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Parts Express |
| Model Number | FBA_180-090 |
| UPC | 663593019622 |
| Operation Mode | Manual |
| Connector Type | F-type |
| Circuit Type | 2-way |
| Mounting Type | Panel Mount |
| Actuator Type | Rotary |
| Contact Material | Copper |
| Number of Positions | 2 |
| Isolation | 75 dB |
| Item Weight | 0.01 ounces |
| Package Dimensions | 3.46 x 2.13 x 0.94 inches |
7. Warranty and Support
This product is covered by the standard manufacturer's warranty. For specific warranty details, technical support, or service inquiries, please contact Parts Express directly.
You can find contact information and additional resources on the official Parts Express website: www.parts-express.com.





