Qsy Function; Operation When Receiving A Qsy; Setting Packet Filter; Position Limit <Position Limit - Kenwood TM-D710A (K type) Instruction 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 TM-D710 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 (+/-), and Offset frequency 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 and Shift/Offset.)
• "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)
Refer to the website for QSY Information Format:
http://aprs.org/info/freqspec.txt (as of April 2011)

■ Operation when Receiving a QSY

1 Select text setting number 5.
• Frequency information is imbedded to the first 10
characters of the status text message.
2 Enter the status text message.
3 When QSY (frequency) information is received, the
station list appears (list summary and details) with
the verified frequency. Press [TUNE].
• The QSY (frequency) is set to the non data band.
Note: When using 6.5 kHz or 12.5 kHz step values, the display
does not indicate values for 100 Hz and lower.

SETTING PACKET FILTER

Enter Menu mode and access Menu 609.
■ Position Limit <POSITION LIMIT>
If APRS is popular in your area, you may receive too
many APRS packets for a short period. If this disturbs
your APRS activities, specify a distance from your
location. You will not receive APRS packets from
stations beyond this distance.
Select the range from 10 to 2500 in steps of 10, plus
OFF (default). The unit is mile or kilometer depending
on the selection in Menu 626 (DISPLAY UNIT 1).
■ Packet Filter Type <TYPE>
The APRS position data is filtered.
• Check the type(s) you want to receive.
• If all types are checked, you will receive all types of data.
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