Vertex Standard manual MARK-V FT-1000MP TNC

ACCESSORY INSTALLATION

DIGITAL MODEM (TNC, WEATHERFAX, ETC.) INTERFACING

Construct a patch cable or cables to make the nec- essary connections between your TNC and the appro- priate rear panel jack(s) (RTTY for FSK, PACKET for AFSK). Refer to the pin-out diagram below, and the wiring instructions included with your TNC. A descrip- tion of the PACKET jack’s individual pins follows:

Pin 1 (DATA IN) - Connect this pin to your TNC’s “AFSK Out” or “Mic Audio” output line. The optimum input level is 30 mV rms, and the input impedance is 3 kΩ. Your TNC’s audio output level potentiometer will allow you to set the level to the optimum value. This pin may be used either for 300 baud SSB-mode digital operation or for 1200-baud FM packet. The bandwidth and frequency response are not, however, suitable for 9600 baud operation.

Pin 2 (Ground) - Connect this to the shield(s) of the cable(s) used for connections between the TNC and the MARK-VFT-1000MP.

Pin 3 (PTT) - Connect this pin to the PTT line from the TNC. This pin, when grounded by the TNC, places the MARK-VFT-1000MPinto the Transmit condition.

Pin 4 (DATA Out) - Connect this pin to your TNC’s “RX Audio” input line. This is a constant-level (100 mV rms @ 600 Ω) audio output line which is not affected by the position of the front-panel AF GAIN control.

Pin 5 (BUSY) - This is a “Squelch Status” pin not generally required for digital mode operation. This pin is held at +5V when the squelch is open, and is grounded when the receiver is muted by the squelch (“no-signal” condition).

For FSK operation using the RTTY jack, the fol- lowing are the pin connections required:

Pin 1 (SHIFT) - Connect this pin to your TNC or terminal unit’s “FSK Key” port. Closing and opening of this line to ground causes mark/space keying.

Pin 2 (RX AF OUT) - Same as “DATA OUT” on PACKET jack.

Pin 3 (PTT) - Same as “PTT” on PACKET jack.

Pin 4 (GND) - Same as “GND” on PACKET jack.

For operation on PSK31, connect your computer's sound card to the PACKET jack (for “PKT” mode op- eration) or the MIC and EXT SP jacks (for “SSB” mode operation).Also,usemenu selection 8-6to configure the "User" mode (see page 110) for PSK31 operation.

For most operation, you will want to use the PS31-

U(for PKT mode) or PS31-SU (for USB mode) op- tions under “East Set;” while BPSK operation is not sideband-sensitive, QPSK operation, by convention, utilizes USB-side injection.

The “User” mode is accessed, during operation, by pressing and holding in for ½ second the [PKT] mode switch.

MARK-V FT-1000MP

TNC

page 16 MARK-V FT-1000MP Operating Manual