User Guide

6 OPERATIONAL EXAMPLES OF APRS
TH-D72A/E CONTENTS 47
The QSY function uses AFRS (Automatic Frequency Reporting System) to report a frequency on
which voice communications can be established. A station using the QSY function embeds the
frequency information of your voice band in a position beacon transmission. A receiving station of
the information can easily tune to the frequency.
In addition to contacts between TH-D72A/Es, when transmitting object information of a repeater or an
EchoLink node station using an APRS software program, if embedding QSY information in the status
text, the receiving station can conveniently set TH-D72A/E or TM-D710A/E to be ready for accessing
the repeater or the node station with a single action.
A properly configured functioning TH-D72A/E QSY station can automatically embed the voice
frequency as well as Tone, Narrow/Wide, Shift (+/-), Offset frequency from the non-data band to the
beginning of status text.
To embed the voice frequency, configure QSY in Status to ON in Menu 3A0 and the frequency will be
automatically added to the beginning of status text and then sent. The format of the transmitted
frequency is FFF.FFF MHz. So, for example, if at the time of a beacon transmission, the non-data
band has a frequency of 446.100 MHz selected, then the frequency of “446.100 MHz” gets
embedded to the beginning of the status text.
Then, to embed Tone and Narrow/Wide information, configure Tone/Narrow to ON in Menu 3A1, and
Wide/Narrow, Tone/CTCSS/SCS and the code of Tone/CTCSS/DCS will be added after the
frequency information in the status text with a single blank space used as a delimiter.
Furthermore, to embed the Shift (+/-) and Offset frequency, configure the Shift/Offset to ON in Menu
3A2, and the Shift (+/-) and Offset frequency will be added after the Tone and Wide/Narrow
information in the status text with a single blank space used as a delimiter.
QSY Information Format:
(Insert one space after the frequency before entering Wide/Narrow, Tone/CTCSS/DCS and Shift/Offset.)
• “T079”: Upper case “T” indicates Wide. Tone frequency of 79.7 Hz (Encoding)
• “t079”: Lower case “t” indicates Narrow. Tone frequency of 79.7 Hz (Encoding)
• “tOFF”: Lower case “t” indicates Narrow. Tone = OFF (Without any tone encoding or decoding.)
• “C079”: Upper case “C” indicates Wide. CTCSS frequency of 79.7 Hz (Encoding/ Decoding)
• “c079”: Lower case “c” indicates Narrow. CTCSS frequency of 79.7 Hz (Encoding/ Decoding)
• “D023”: Upper case “D” indicates Wide. DCS code of 023. (Encoding/ Decoding)
• “d023”: Lower case “d” indicates Narrow. DCS code of 023. (Encoding/ Decoding)
• “+”: Plus Shift (A default offset frequency is applied.)
• “-” : Minus Shift (A default offset frequency is applied.)
• “+500” : Plus Shift, 5 MHz Offset
• “-060”: Minus Shift, 600 kHz Offset. The value of the Offset shall be a 3-digit number. (x 10 kHz/
50 kHz step)
Note: For detailed information on the QSY Function format, refer to the following link: (http://aprs.org/info/freqspec.txt). The
TH-D72A/E transceiver complies with the standard which was proposed by Bob Bruninga, WB4APR.
6.1.6 QSY Function
6.1.6.1 Transmitting QSY Information