Qsy Function - Kenwood TH-D74A User Manual

QSY FUNCTION

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 in a position
beacon transmission. A receiving station of this information
can change frequency, or QSY, over to the reported voice
frequency to begin voice communication by the select of
[Tune].
Transmitting QSY Information
A properly configured functioning TH-D74 QSY station can
automatically embed the voice frequency from the non-data
band to the beginning of status text. This is the mechanism
used for automatically transmitting the frequency information.
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 "446.100MHz" gets embedded to
the beginning of the status text. If you configure in any of
Statuses 1 through 4 the frequency of "446.100MHz" at
the beginning of the status text messages, then this fixed
frequency will be transmitted as QSY information along with
the beacon transmission. In addition to frequencies, there
are fields where you can send other settings such as Wide/
Narrow, Tone/CTCSS/DCS, Shift (+/-), Offset frequency,
or D-STAR operation status simply by -leaving one space
between each value. Therefore, other information besides just
a frequency can be sent.
QSY Information Format:
(Insert one space after the frequency before entering Wide/
Narrow, Tone/CTCSS/DCS, Shift/Offset, or D-STAR operation
status.)
• "T079": An upper case "T" indicates Wide. Tone frequency
of 79.7 Hz. (Encoding)
• "t079": A lower case "t" indicates Narrow. Tone frequency
of 79.7 Hz. (Encoding)
• "tOFF": A lower case "t" indicates Narrow. Tone = OFF
(Without any tone Encoding or Decoding.)
• "C079": An upper case "C" indicates Wide. CTCSS
frequency of 79.7 Hz. (Encoding/ Decoding)
• "c079": A lower case "c" indicates Narrow. CTCSS
frequency of 79.7 Hz. (Encoding/ Decoding)
• "D023": An upper case "D" indicates Wide. DCS code of
023. (Encoding/ Decoding)
• "d023": A 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)
• "D-STAR": D-STAR simplex (DV) mode
• "D-STAR>W6DJY B": D-STAR Repeater (DR) mode
(monitoring "W6DJY B" as the access repeater)
Note:
◆ Refer to the website for QSY Information Format:
http://aprs.org/info/freqspec.txt (as of September 2016)
QSY Transmission Operation
This function embeds the voice channel frequency, Wide/
Narrow status, tone, shift, and offset information in the first
character of the status text.
1 Access Menu No. 520.
2 Select [On].
Set to [On] to embed the frequency information at the
beginning of the status text. When the voice channel (non-
data band) is in DR mode, the configured access repeater
information will also be embedded.
3 Access Menu No. 521.
4 Select [On] or [Off].
Set to [On] to embed the frequency, then followed by the
tone/FM narrow information in the status text.
5 Access Menu No. 522.
6 Select [On] or [Off].
Set to [On] to embed the frequency information, tone/
FM narrow information, followed by the shift direction and
offset width information in the status text.
QSY Limit Distance
This function is for tuning in to only data within a specified
distance range from your own station and setting a QSY
information such as frequency for a non-data band in APRS
data communication.
1 Access Menu No. 523.
2 Select [Off], [10], [20] ... [2490], or [2500]. (The unit
selected in Menu No. 970
14-16
is used.)
(Speed, Distance)