Communications Specialist DCS-23 Digital Squelch Encoder Board

Description

Attention Hams: Communications Specialist DCS-23  Digital Encoder Board.   New Old Stock.    These were used to add digital PL, etc capability to radios without it.
DCS-23
Microminiature DCS Encoder-Decoder
Specifications:
Powered by 6.0 to 20.0vdc @ 8ma.
Temperature operating range from -30
0
C to +65
0
C.
Decodes off discriminator input, impedance 60K ohms, AC coupled.
Decode sensitivity better than 15mv RMS with signal to noise better than 4db Sinad.
Open collector transistor for receiver muting.
Open collector transistor for PTT output.
Decode time, 171ms maximum (1 word length).
Turn off code, 134.4hz sine wave for 180ms.
Receiver audio filter on board, 3 pole, 330hz high pass filter.
Encoder, Golay 23 bit digital word sent at 134.4hz rate.
Encoder output impedance is 2.2K ohms, AC coupled, adjustable from 0 to 3 volts.
Features:
Compatible with all digital coded squelch systems.
Microminiature in size, 1.36" X 1.18" X .25" to fit inside all mobiles and most portables.
Crystal controlled CMOS microprocessor for low voltage operation.
Three pole high pass filter included to remove tone from received audio.
All 512 octal codes programmed by PCB jumpers.
Field programming of both transmit and receive data polarity.
Completely immune to RF.
Automatic squelch tail elimination by turn off code detection.
Test code to set transmitter modulation level included.
Automatic hookswitch monitoring when microphone is removed from hanger.
All connections made with microminiature plug and socket with color coded wires attached.
Comes with instructions.  SOLD STRICTLY AS IS, as with all electronics.   As i can not control how the buyer handles these boards, I can not accept returns.
USA Buyers Only. Buyer prepays with PayPal.
Email any questions.