Speaker Jack
-
To connect to the control head, your external speaker must be wired to the tip
and outer portions of a
3.5
mm stereo phone jack. The speaker amplifier is designed to
accommodate
4-
or 8-Ohm speakers. The 4-Ohm speaker will give twice the audio output,
assuming both speakers are equally efficient. If you want to route the audio through your
computer's sound card, you will need to run a cable (not supplied) from the control head's
speaker jack
to
the audio input jack on your sound card. You must then connect the speaker t o
your sound card's audio output jack.
ACC1.
Audio Accessory Connector
-
connector is
for use with audio accessories
such as an external modem or telephone
(See Figures
7
and
10)
This 25-pin sub-D
Phone Jack
-
Headphones in the
4-
to
2000-Ohm impedance range may be plugged into the
phone jack. A series resistor automatically compensates for various impedance levels. The
external speaker is disabled when the phones are plugged into the control head.
1 3 1 2 1 1 1 0 0
7 6
i
2
1
8.
RearPanel
Three rear panel connectors are provided to allow the use
of
power amplifiers, antenna tuners,
and audio accessories. Use subminiature
"D"
connectors
of
the appropriate size, and refer
to
Figure
I
O
for the pin assignments.
The
PTT
line must be grounded
to activate the transmitter. The line will source approximately
I 2
mA of current. A switched
+
I 2
VDC output
is provided on pin
I 3
for
accessories
that
draw
less than
2
A.
ACC2.
External Antenna Tuner
5
4
3
2
1
Connector
-
(See Figures
8
and
I O) A
9-
pin sub-D connector provides connections
to an external automatic antenna tuner.
ATUI NIT is
a
5-Volt logic signal toggled by
the transceiver's microprocessor when the
TUNE
control
is
activated. ATUKEY is a
signal to be grounded by the tuner when
20
Figure
8
Ext. Antenna Tuner Connector
Watts
of
CW
carrier is desired to tune the
antenna tuner. The tuner must sink approximately
I2mA
of
current to activate this function. A
source of
+
I 2 VDC
at up to
2 A is
provided.
und
ion Guide
