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Multi-Mode Decoder |
CRNDEC-12 Multi-Mode Decoder
The CRN Multi-Mode Decoder (CRNDEC-12) decodes CRN Blink-of-an-Eye data signals and provides an RS-232 output of the decoded data to interface with external serial devices.The CRNDEC-12 is available in two configurations; a full-length, 8-bit card for use in PC compatible computers or a stand alone slave model with screw terminals for connection to an external 12VDC source. Both models utilize factory programmable microprocessor based plug-in decode modules which will enable the user to upgrade the unit for future CRN data formats. The built in RS-232 interface allows for connection to a wide variety of external serial devices. In addition, the PC model utilizes the data bus and CRN software to provide a signal level reading of decoded signals.
The RS-232 port is a DTE (Data Terminal Equipment) type with a 25-pin male "D" connector and is attached to external serial devices with a standard serial cable.
Connection to the CRN RF Receiver or other audio source (leased telephone line, etc.) is made with a supplied 6-conductor RJ type modular cable. The CRNDEC-12 provides 12VDC power to the CRN RF Receiver, with a user replaceable and software supervised (PC model) fuse on board. The other conductors of the cable are used to carry audio, ground and carrier detect signals.
The optional software (CRNSOFT) for the PC model allows for transmitter identity re-mapping, transmitter code re-mapping, supervised host computer RS-232 output, parallel line printer output, RF receiver supervision, audio speaker volume control, site (repeater) location identity and decoded signal RF level indication.
A built-in amplifier drives an on board speaker allowing the user to monitor the input audio and provides audio output to the optional CRN Listen Module (see reverse). Visual indication of carrier detect (CD), received signal level, RS-232 handshaking and relay operation is provided by on board LED indicators.
CRNDEC-12 FEATURES
- PC compatible card or stand alone slave configuration
- Decodes all CRN Blink-of-an-Eye data formats
- Fused 12VDC output powers CRN RF Receiver
- Built-in RS-232 serial interface for connection to external serial devices
- Built-in audio amplifier and speaker allows monitoring of input audio source
CRNRUHF & CRNRVHF RF Receiver
The crystal controlled CRN RF Receiver is available in UHF (CRNRUHF) and VHF (CRNRVHF) models, and provides the RF interface between CRN Alarm Transmitters and the CRN Multi-Mode Decoder.The UHF models are available with Narrow Band FM (+7.5kHz bandwidth) or Very Narrow Band FM (+5kHz bandwidth) filters. VHF models are available with Narrow Band FM (+7.5KHz bandwidth) filters. The receiver features flat, broadband demodulated audio frequency response of 10Hz to 3KHz, which is optimized for the CRN Blink-of-an-Eye data format, fast attack time, low power consumption and a GaAs FET front end for high sensitivity and low intermod. When used in high RF environments, front end band-pass cavity filters are recommended.
CRNRUHF & CRNRVHF Features
- Crystal controlled UHF (450-512MHz) or VHF (136-174Mhz) models
- Narrow Band FM and Very Narrow Band FM (UHF only) filters available
CRNCU7 Call-Up Listen-In Device
The CRN Call-Up Listen-In Device (CRNCU7) couples an audio source, such as the CRN RF Receiver to a standard dial-up telephone line to allow remote audio diagnosis of CRN Alarm Transmitter signals.An installer can call the CRNCU7 from an ordinary telephone and listen to CRN Blink-of-an-Eye data signals as they are received at the receive site. Satisfactory, marginal or poor signals are easily distinguished, allowing for immediate relocation of the CRN Alarm Transmitter when necessary.
The unit is powered from 12V AC or DC, and connects to the telephone line via a standard modular jack. An internal jumper selects a maximum call time of 1 to 10 minutes.
CRNCU7 Features
- Call-Up Listen-In device allows for remote monitoring of receiver audio output
- 12V AC or DC powered; low current draw
- User programmable call duration timer
CRNCU7 Specifications
ELECTRICALINPUT VOLTAGE 12.5V +15% AC OR DC CURRENT DRAW <10mA
PHYSICAL
DIMENSIONS 2.875"W X 7.825"H X 1.635"D INPUT POWER CONNECTOR MINIATURE SCREW TERM TELEPHONE LINE CONNECTOR MODULAR JACK
ENVIRONMENTAL
TEMPERATURE 0oC to 55oC HUMIDITY 95% NON CONDENSING
CRNRUHF & CRNRVHF Specifications
RF SPECIFICATIONSFREQUENCY RANGE (UHF) 450 TO 512MHz FREQUENCY RANGE (UHF) 136 TO 174MHz FREQUENCY STABILITY +5 PPM SENSITIVITY 12db SINAD 0.25uv IF SELECTIVITY 6db (NBFM & VNBFM) DEMOD FREQUENCY RESPONSE +1dB 10Hz to 3KHz HARMONIC DISTORTION <5% (1KHz AUDIO) AUDIO OUTPUT 1V PK-PK INTO 600 OHMS
ELECTRICAL
INPUT VOLTAGE 12.5VDC +15% CURRENT DRAW <27mA
PHYSICAL
DIMENSIONS 2.875"W X 7.825"H X 1.635"D RF (ANTENNA) CONNECTOR BNC POWER/AUDIO CONNECTOR EMI/RFI SHIELDED 9-PIN "D"
ENVIRONMENTAL
TEMPERATURE 0oC to 55oC HUMIDITY 95% NON CONDENSING
CRNDEC-12 Specifications
ELECTRICALINPUT VOLTAGE 12.5VDC + 15% OUTPUT VOLTAGE 12.5VDC + 15% CURRENT DRAW <100MA
PHYSICAL
PC BOARD DIMENSIONS 3.875"H X 13.125"W RS-232 CONNECTOR 25-PIN "D" MALE INPUT POWER CONNECTOR PC DISK DRIVE TYPE POWER OUT/AUDIO IN CONNECTOR RJ TYPE MODULAR SLAVE MODEL CONNECTIONS MINIATURE SCREW TERM
SERIAL (RS-232) INTERFACE
TYPE DATA TERMINAL EQPT (DTE) BAUD RATE 9,600 BPS PARITY NONE DATA BITS 8 STOP BITS 1
ENVIRONMENTAL
TEMPERATURE 0oC TO 55oC HUMIDITY 95% NON CONDENSING
