This page covers connecting the SCS PTC-IIpro to an Icom M710 (or M700pro) marine transceiver. The audio connections are the same as the PTC-II/IIe, the radio-control connection is specific to the IIpro.
Audio connections:
PTC-IIpro Audio Icom M710 ACC(1)
(8-pin SCS DIN) (8-pin Icom DIN)
---------------- -----------------
(Tx audio) Pin 1----(vio)-----Pin 4 (Mod)
(Rx audio) Pin 4----(grn)-----Pin 5 (AF out)
(PTT) Pin 3----(yel)-----Pin 3 (PTT in)
(Gnd) Pin 2----(wht)-----Pin 2 (ground)
(+12V) Pin 5----(blu)-----Pin 7 (12V out- see note)
Shell---(shield)---Shell
Notes:
1. The colors shown above are for the pigtail cable supplied with the PTC-IIpro. Check the colors with an ohmmeter, errors are possible.
2. The German-style DIN connector has a different physical pin geometry, and is not interchangeable with the US-style DIN connector used by Icom. Label the cable ends to avoid any confusion over which end goes where.
3. The PTC-IIpro has provision for an alternate 12V input on its HF audio connector. This provides a convenient way to connect power to the modem, but if the cable is particularly long then this could be a source of RF interference. Consider a separate power connection for long cables.
Remote Control
Remote frequency-control is optional, but highly recommended when a PTC-IIpro modem is used with an Icom M710/M700pro transceiver. There are two options for connecting remote control to the radio, the recommended connection is to use the M710's 9-pin "Remote" connector (supported from Airmail ver 3.0.857 onwards). Some Icom M700pro radios have the 9 pin "Remote" connector and can also use this option. As an alternative, the 1/8" mini-phone "Clone" jack can be used, see "option 2" below. For some M700pro radios (without a "Remote" jack), using the "Clone" jack is the only option.
PTC-IIpro "Control" to ICOM "Remote" jack
(13-pin DIN) to (DB-9P 9-pin male)
----------- --------------
Pin 3 (yellow) -------- NMI+ 5
Pin 8 (red) ----------- NMO+ 7
Pin 13 (orange) ---+--- NMI- 6 (see note)
Pin 13 (orange) +--- GND 9
Shell ----(shield)----- Shell
Note: Add a jumper between pin 6 and 9 on the 9-pin connector, so that the (orange) ground wire connects to both pins. Also make sure that unused wires are carefully insulated, short-circuits can damage the radio or modem.
Radio Settings:
In order to use the NMEA interface, it must first be selected using the front-panel "Set Mode" functions (turn power on while holding down the "Func" and "1" buttons). Select the "REMT-IF" (remote interface) setting and change it "d-Sub" (or "RS-232" on some models). Also check that "REMT-ID" is set to "01" (or set Airmail to match the REMT-ID setting).
AirMail Options Settings:
Modem (TNC) connection:
Modem type: PTC-IIpro
Comm port: COM1 or as appropriate
Baud rate: 57600
Show link messages: no check
Ignore CTS: no check
Restart controller: checked (optional)
Audio Tones:
Center Frequency: 1500
Check "USB"
TxD: 20 ms
CsD: 25 ms
unCheck "Marine (FSK dial=center)"
Amplitudes: as appropriate, start with 130/170
Radio connection:
If a COM-port connection is provided then see COM-port
Check "Direct using PTC-II control port"
RS-232: Checked (this is important!)
Radio type: Icom-NMEA:
Baud: 4800
VFO: not used
Icom Addr (hex): 01 (or to match radio's REMT-ID setting)
Uncheck "Set narrow filters"
Dial offset: 00
Remote control Option 2:
If desired, the Icom's 1/8" mini-phone "clone" jack can be used for remote control. This works fine, but has two minor disadvantages: It is not officially supported by Icom, and the "clone" jack is not as robust mechanically.
PTC-IIpro "Control" to ICOM "clone" jack
(13-pin DIN) to (1/8" mini-phone plug)
----------- --------------
Pin 6 (black) --------- tip contact
Pin 13 (orange) ------- ground contact
Shell (shield) -------- ground contact (with orange wire)
Note: insulate unused wires carefully, as short-circuits can damage the radio or modem.
Settings: the same as above, except in Airmail's Options settings do NOT check the "RS-232" box.
AirMail Help ©1997-2008 Jim Corenman ke6rk