Reversed-Circuit Receiver

This Circuit-Configuration Manager page is used when a circuit is set to "Reversed". In a reversed circuit, the transmitter and receiver ends are switched. In other words, typically the "user station" is the transmit end of the circuit. In a reversed circuit the "user station" becomes the receive end of the circuit. There can be some difference in the predictions. See the Circuit-Configuration Manager topic and the "Reverse" control.

When you change from "forward" to "reverse" circuit the xmtr antennas configured also switch to the "other" end. Your "stations" in Station-Parameters Manager have the special groups of "receive" parameters - "Man-Made Noise", "R Ant Name", "Gain" and "Az" that are only used for reverse circuits and "your station".

In contrast, coverage predictions "can never be reversed" and so ignore the reverse circuit setting.

Likely the easiest way to view the antenna specifications that were used for point-to-point, beacon and prediction batch circuits is using the "Results Inspector" - the antennas are on the "header" and easily comparable..

#1 Enter your station Country and City information. The city is the most important for our purpose, as it’s used on the chart display. The reports display both country and city. Feel free to substitute a call sign for the city.

Enter the geographic coordinates in decimal degrees and indicate if the location is north or south, of the equator and east or west of the prime meridian. If you do not know your coordinates you can look in the DX Gazetteer for a location near you. The DX Gazetteer provides a button, named "New Station", that can be used to quickly add "stations".

Click the “Time Zone” button to display the time zone picker window. Use the drop-down list to select the time zone for the location you entered above. Click the OK button. This time zone is used on the chart to provide the correct “local” time on the upper axis. Additionally, see the section Time Zone Picker.

#2 Click the “Select Antenna” button to choose an antenna other than an Isotrope. The default antenna is a good starting point and you are not required to change this now. The related “Gain” value is dB gain above an Isotrope. The “Bearing” value should be left at 0 to cause the prediction engine to “point” the antenna toward the transmitter, or other station. See “Antenna Browser”

#3 Select one of the four preset values to indicate the noise at the receive-end-of-the circuit. Note - in a reversed circuit, this is usually the user station. This selection can have a significant effect on the predictions.

"Receive Noise" indicates the expected man-made noise level at the receiver in dBW (decibels below 1W) in a 1 Hz bandwidth at 3 MHz. Receive noise relates to the receiving location area as follows:

Industrial -125 dBW

Residential -136 dBW

Rural -148 dBW

Remote -164 dBW

Finally, if you are satisfied with your changes, click the navigator button with the “check mark” indication to save the group. Clicking the button with the “x” indicator will cancel any changes since the last save.

See the topic The Station Location for more information.