Introduction
The Astatic PDC1 100 Watt SWR Meter is designed to assist in tuning CB radio antennas and assessing coax cable conditions. Proper tuning is crucial to prevent permanent damage to CB equipment and ensure optimal transmission and reception performance. This compact, 2-function analog test meter measures Standing Wave Ratio (SWR) and relative power for 50-Ohm antenna and coax cable systems used in CB operations.
Key Features
- 3-Function Analog Meter: Provides clear, easy-to-read measurements.
- Antenna & Coax Condition Indicator: Specifically designed for 50-Ohm CB antenna and coax cable systems.
- SWR and Relative Power Testing: Allows for comprehensive analysis of your CB setup.
- Selectable Power Ranges: Features 10 Watt and 100 Watt switches for versatile testing.
- Forward and Reverse Switches: Enables measurement of both forward and reflected power.
- CB Radio Compatibility: Optimized for use with most CB radios.
Product Overview
This video provides a general overview of the Astatic PDC1 SWR Meter, demonstrating its physical appearance and basic functions.
Setup and Connections
Proper connection of the Astatic PDC1 SWR Meter is essential for accurate measurements and to prevent damage to your equipment. Follow these steps:
- Identify Ports: Locate the 'TX' (Transmit) and 'ANT' (Antenna) ports on the rear of the SWR meter.
- Connect CB Radio: Using a short, high-quality coaxial jumper cable, connect the antenna output of your CB radio to the 'TX' port on the SWR meter.
- Connect Antenna/Dummy Load:
- For SWR measurement: Connect your CB antenna to the 'ANT' port on the SWR meter.
- For Power measurement: Connect a suitable dummy load (rated for your radio's maximum output power) to the 'ANT' port on the SWR meter. Ensure the dummy load can handle the transmission power to avoid damage.
Figure 1: Front view of the Astatic PDC1 SWR Meter, showing the analog display and control switches.
Figure 2: Rear view of the Astatic PDC1 SWR Meter, highlighting the 'TX' and 'ANT' connection ports.
Operating Instructions
Measuring SWR (Standing Wave Ratio)
- Connect Equipment: Ensure your CB radio is connected to the 'TX' port and your antenna is connected to the 'ANT' port as described in the Setup section.
- Set Power Range: Select the appropriate power range using the 10W / 100W switch. For most CB radios, start with 100W.
- Set Function: Set the PWR / SWR switch to 'SWR'.
- Set Direction: Set the FWD / REF switch to 'FWD' (Forward).
- Calibrate: While transmitting a continuous carrier (e.g., by pressing the PTT button on your microphone), adjust the 'CAL' knob until the meter needle aligns with the 'SET' mark on the SWR scale.
- Measure SWR: Release the PTT button. Then, set the FWD / REF switch to 'REF' (Reflected). Transmit again. The meter will now display your SWR reading.
- Interpret SWR:
- An SWR reading of 1.5:1 or lower is generally considered excellent.
- Readings between 1.5:1 and 2.0:1 are acceptable.
- Readings above 2.0:1 indicate a poor match and should be addressed by adjusting your antenna. High SWR can damage your radio.
Measuring Relative Power
- Connect Equipment: Ensure your CB radio is connected to the 'TX' port and a suitable dummy load is connected to the 'ANT' port.
- Set Power Range: Select the appropriate power range using the 10W / 100W switch.
- Set Function: Set the PWR / SWR switch to 'PWR' (Power).
- Set Direction: Set the FWD / REF switch to 'FWD' (Forward).
- Measure Power: Transmit a continuous carrier. The meter will display the relative forward power output of your CB radio in Watts.
Specifications
| Feature | Detail |
|---|---|
| Brand | Astatic |
| Model Number | PDC1 (Manufacturer Part Number: 302-01637) |
| Item Weight | 8 ounces (0.5 Pounds) |
| Product Dimensions | 6.5 x 5.1 x 3.2 inches |
| Frequency Range | 27 MHz (Optimized for CB frequencies) |
| Power Ranges | 10 Watt, 100 Watt |
| Functions | SWR, Forward Power, Reverse Power |
| Compatible Devices | Most CB radios |
| Included Components | User Manual |
Troubleshooting
- No Meter Movement: Ensure all connections are secure and the CB radio is transmitting power. Check the power range switch setting.
- High SWR Readings: This typically indicates an issue with your antenna system. Check antenna length, mounting location, and coaxial cable for damage or shorts.
- Inaccurate Readings: Ensure the meter is properly calibrated before taking SWR measurements. Verify that the correct power range is selected for your radio's output.
Maintenance
The Astatic PDC1 SWR Meter requires minimal maintenance. Keep the unit clean and dry. Avoid exposing it to extreme temperatures or moisture. Store in a safe place when not in use to prevent physical damage.
Warranty and Support
For warranty information and technical support, please refer to the documentation included with your purchase or contact Astatic customer service directly. Keep your proof of purchase for any warranty claims.
