page 16 MARK-V FT-1000MP Operating Manual
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-V FT-1000MP.
Pin 3
(
PTT
)
- Connect this pin to the PTT line from
the TNC. This pin, when grounded by the TNC, places
the MARK-V FT-1000MP into 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, use
menu selection 8-6 to 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.
ACCESSORY INSTALLATION
DIGITAL MODEM
(
TNC, WEATHERFAX, ETC.
)
INTERFACING
TNC
MARK-V FT-1000MP
