Kenwood TH-D74A User Manual - Page 75

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 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 (nondata 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 (Speed, Distance) is used.) 14-16