D.C.S.

NC105 Dip-Switch Programmable Digital Coded Squelch Encoder/Decoder

The Model NC105 is a micro-miniature field programmable D.C.S. Encoder/Decoder compatible with most F.M. commercial communications equipment. The Model NC105 is a highly versatile CMOS Microprocessor controlled unit providing user friendly programming of input and output functions and up to 176 D.C.S. codes. Compatible with Motorola's DPL and G.E.'s DCG, programmed via an on-board miniature dip switch . All programming can be performed with power on and is retained in a nonvolatile E2Prom memory.

FEATURES:
Size: 0.80"W x 1.63"L x 0.30"H
(.20"H with sip switch removed)

ENCODER:

CODE SELECTION: 176 pre-set codes plus no code
CODE DATA POLARITY: normal or inverted
OUTPUT LEVEL: 0 to 850mVRMS
OUTPUT IMPEDANCE: >5K OHM, AC coupled
OUTPUT DISTORTION: <2.0% THD
TURN-OFF CODE: 134.4Hz sine wave for 180mS
TX KEY OUTPUT: sinks to ground
PTT INPUT: above or to ground
PTT/TX KEY: common or following

DECODER:

CODE SELECTION: 176 pre-set codes plus no code
CODE DATA POLARITY: normal or inverted
DECODE DETECT: 171.1mS (one word)
DECODE DROP OUT: <500mS signal fade
DECODE RELEASE: <35mS with turn-off codes
DECODE OUTPUT: above or to ground
INPUT SENSITIVITY: <10mVRMS
INPUT S/N RATIO: <7db sinad
INPUT IMPEDANCE: >60K OHM, AC coupled

GENERAL:

SIGNALLING FORMAT: 23 bit binary coded word
OPERATING VOLTAGE: 5.5VDC to 20VDC
OPERATING CURRENT: <10mA
OPERATING TEMPERATURE: -30°C to + 70°C
BUSY LOCK-OUT INPUT: Above or to ground (± 1.5VDC threshold)
TX TIME-OUT TIMER: 0 to 150 sec.
B.L.O./T.O.T. ALERT TONE: 900/1800Hz, pulsating at 125mS

For complete details see the NC105 Manual

NC105 Digital Coded Squelch Encoder/Decoder