<h3>1: Frequency shift from center frequency of transmission</h3>
Use the wheels to adjust the frequency shift in Hz from the center frequency of transmission. Left click on a digit sets the cursor position at this digit. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arrows. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2.
<h3>2: Channel power</h3>
Average total power in dB relative to a +/- 1.0 amplitude signal generated in the pass band.
Check this button to enable a FM preemphasis filter, which amplifies higher frequencies. Right click to open the dialog to adjust settings for the filter.
Check this button to repeated transmit a packet. Right click to open the dialog to adjust the delay between retransmission and number of times the packet should be repeated.
Inserts position as APRS formatted latitude and longitude in to the current cursor position within the data field. Lattitude and longitude can be specified under Preferences > My position.
Enter the routing for the packet. To have the packet repeated by digipeaters, use WIDE2-2. To have the packet repeated by the International Space Station (ISS), use ARISS.
The packet of data to send. To send an APRS status message, use the format <tt>>Status</tt>. The APRS specification can be found at: http://www.aprs.org/doc/APRS101.PDF. APRS messages can be tracked on https://aprs.fi
When checked, a UDP port is opened to receive packets from other features or applications that will be transmitted. These packets do not need to contain the CRC, as it is appended automatically.
<h3>19: UDP address</h3>
IP address of the interface open the UDP port on, to receive packets to be transmitted.
<h3>20: UDP port</h3>
UDP port number to receive packets to be transmitted on.
