TEN-TEC RX340 AUX/AUDIO OUTPUT PINS
Wiring for 15 pin male D type plug;
Pin 1 - Ground
Pin 2 - Mono audio output (AC coupled audio. Decoupled through a pair of back to back
33 µf capacitors).
Pin 3 - Audio line output B
Pin 4 - Audio line output BCT
Pin 5 - Audio line output B+
Pin 6 - Audio line output A
Pin 7 - Audio line output ACT
Pin 8 - Audio line output A+
Pin 9 - Ground
Pin 10 - Mono audio output (DC coupled audio. Resistive connection straight from audio
amplifier).
Pin 11 - Mute
Pin 12 - User function
Pin 13 - User function
Pin 14 - User function
Pin 15 - User function
For most normal audio output applications use the mono AC coupled audio output on pin
2 with pin 1 as ground. This will give up to 10 mW output into a 600 ohm load.
For more specific applications where the full audio frequency bandwidth is required (i.e.
certain data decoding uses), use the mono DC coupled audio output on pin 10. Do not
use this output to connect to any equipment with any appreciable amount of DC voltage
floating on its input connection. Output is 10 mW into 600 ohm.
Two balanced line outputs are provided giving a 0 dBm level / 600 ohm. Line output A
and B give the same audio output in all modes except ISB where A gives the USB signal
and B the LSB signal.
These two outputs have their own independent output transformers so arc isolated
from each other and from any ground connection.
For most purposes (e.g., for a stereo tape recorder), wire the center and ground of
one RCA/phono to B+ and B- respectively for one channel and the center and ground of
another to A+ and A- respectively.
In addition, a transformer centre tap is provided on each line output (ACT and
BCT) where balanced line output is required.
Refer to manual sections: 1-4 for interface connections.
3-4 (fig 3-5) for connections.
10-33/34 for circuit wiring details.
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