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10 FT-7800R OPERATING MANUAL
Pin
1
2
3
4
5
6
Label
PKD
(
DATA IN
)
GND
PTT
RX9600
RX1200
PKS
(
SQL
)
Note
Packet Data Input
Impedance: 10 k,
Maximum Input Level: 40 mV p-p for 1200 bps
2.0 Vp-p for 9600 bps
Signal Ground
Gound to Transmit
9600 bps Packet Data Output
Impedance: 10 k, Maximum Output: 500 mV p-p
1200 bps Packet Data Output
Impedance: 10 k, Maximum Output: 300 mV p-p
Squelch Control
Squelch Open: +5 V, Squelch Close: 0 V
CT-39A Wire Color
Brown
Red
Orange
Yellow
Green
Blue
BASE STATION INSTALLATION
The FT-7800R is ideal for base station use as well as in mobile installations. The
FT-7800R is specifically designed to integrate into your station easily, using the informa-
tion to follow as a reference.
AC Power Supplies
Operation of the FT-7800R from an AC line requires a power source capable of providing
at least 9 Amps continuously at 13.8 Volts DC. The FP-1023 and FP-1030A AC Power
Supplies are available from your Yaesu dealer to satisfy these requirements. Other well-
regulated power supplies may be used, as well, if they meet the above voltage and current
specifications.
Use the DC power cable supplied with your transceiver for making power connections to the
power supply. Connect the RED power cable lead to the POSITIVE (+) power supply
terminal, and connect the BLACK power cable lead to the NEGATIVE (–) power supply
terminal.
Packet Radio Terminal Node Controller
(
TNC
)
The FT-7800R provides a convenient rear-panel DATA jack for easy connections to your
TNC. This connector is a standard mini-DIN connector. A pre-wired connector and cable
assembly option, model CT-39A, is available from your local Yaesu dealer.
The FT-7800R’s DATA jack connections are optimized for the data transmission and recep-
tion speed in use. In accordance with industry standards, the signal levels, impedances, and
bandwidths are significantly different on 9600 bps as opposed to 1200 bps. If your TNC
does not provide multiple lines to accommodate such optimization, you may still be able to
utilize your TNC, if it is designed for multiple-radio use, by connecting the TNC “Radio 1”
port to the 1200 bps lines on the FT-7800R, and the “Radio 2” port to the 9600 bps lines.
The pin connections of the Data connector are shown below.
INSTALLATION
12


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