WWVB Antenna Alignment
The relative signal strength measurement may be used to aid antenna orientation by placing the antenna so as to maximize the AGC voltage measurement. The circuit that develops the AGC voltage has a very long time constant. A pause of 30 to 60 seconds is necessary after each move of the antenna to allow the AGC to stabilize. A few minutes of experimentation should produce optimum antenna orientation.
The Great Circle Map shown below and is used to determine the correct antenna orientation per receiver location. Follow the instructions below the map scale to determine a compass heading. The antenna position may be optimized using the AGC measurements described in WWVB Signal Strength Measurement.
Compass orientation for directional antenna