Specifications

117
(17) Option socket
The option socket is mounted on the right hand side of the cabinet
underneath the 12V d.c. input socket. The socket is protected from
dust by a grey rubberised case stopper which is hinged toward the
front of the cabinet. Gently lift the stopper from the rear edge to
reveal the D-shaped metallic socket. Be careful to keep dust and dirt
from this socket and to prevent liquid entering the AR8200 via this
socket. Ensure that no conductive material is allowed to short circuit the
socket which may damage the receiver.
The option socket has three main uses:
1. Connection of the optional CR8200 tape recording lead
2. Connection of the optional CO8200 data clone lead
3. Connection of the optional CC8200 computer control lead with level
shift (available with imperial (PC98) & metric (DOSV) screws)
Other signals are available via the option socket including detector output, mute and AGC.
Typical pin-out of the optional leads are as follows:
RED +4.2V
BLACK RXD
BLUE GROUND
BROWN MUTE
ORANGE AGC
SHIELD GROUND
WHITE TXD
YELLOW GROUND
GREEN AUDIO OUT
GREY DETECTOR OUT
PURPLE GROUND
Output levels are as follows:
MUTE CMOS (0V or 5V)
AUDIO OUT Constant level into greater than 10k OHMS
DETECTOR OUT Available in NFM & SFM, impedance 10k OHMS
AGC 3.5V to 0.5V, impedance 10k OHMS
RS232C TXD + RXD (levels to drive a level shift converter)
&Note: The voltage output level to drive external RS232 is
deliberately below ‘H’ level. If connecting to an external I.C.,
you must be aware of latch status.
PSU 4.2V at 20mA
Section 17