• SMX921 Repeater

SMX920/921 Repeater

The S and SD Series, low current Repeater and Base Station solutions, are designed from the ground up for the absolute lowest power consumption and features the lowest current draw of any professional high performance Repeater/Base Station on the market today. Advanced circuit design and optimization is demonstrated by the very high level of RF performance achieved while maintaining very low power consumption levels. The S & SD set a new industry benchmark by avoiding dated techniques that try to save power wasted by constantly duty cycling the receiver on and off or degrading the RF performance to unacceptable levels. The S & SD do not sacrifice any of these critical requirements and achieves a level of performance that competing products can provide at any power consumption level. Available as a Base Station or Repeater, in Analog Conventional (SMX) or P25 Digital (SDMX) (with LZAST92 P25 Option).


TOP FEATURES

  • Very Low current consumption
  • No need for receiver duty cycling
  • System Interface
  • Fully Programmable / Configurable via PC or serial device
  • Remote controllable Multi tone CTCSS community decoder
  • 100% full power duty cycle
  • 5 Tone signaling
  • High Accuracy Real Time Clock.
  • Multi staged TX VF processing with triple limiters
  • Flash Firmware Upgrade Capable
  • Battery backup system option
  • Built In Test Equipment (B.I.T.E.) and remote diagnostics
  • Broad Band High Efficiency LDMOS PA module
  • RX & TX Switching BW covers full sub band
  • Fast Serial Data Interface
  • Full Digital alignment and calibration
  • Field interchangeable PA module needs no re-alignment
  • Pre calibrated power and deviation alignment. Digital value
  • Low RFI and EMI emission design
  • Controlled TX RF envelope
  • DTMF decoder
  • DTMF Remote control
  • Latest technology, full SMD
  • Advanced and optimized RF design
  • High performance 16 bit Flash processor
  • Programmable 12.5/25kHz channel spacing
  • Configurable Function Front Panel LEDs
  • Low current LEDs with digital intensity control
  • Simple and fast disassembly for service
  • Precision internal shielding system
  • Minimal technician adjustments for future maintenance
  • Design spec –40 to 70 degrees C
  • Low aging oscillators
  • Universal microphone input circuit
  • Minimal interconnections
  • Options can be easily retrofitted
  • Minimal mechanical adjustments
  • Front end RX filter never needs realignment
  • Built in TX modulation alignment audio oscillator
  • Built in auto alignment software guides technician
  • Fast and simple disassembly
  • Built on proven technology
  • Configuration password protected
  • Virtual elimination of internal wiring
  • Elimination of helical filters, quadrature coils, MCF matching and trim potentiometers
  • Low current LEDs with digital intensity control
  • Simple and fast disassembly for service
  • Precision internal shielding system
  • Minimal technician adjustments for future maintenance
  • Design spec –40 to 70 degrees C
  • Low aging oscillators
  • Universal microphone input circuit
  • Minimal interconnections
  • Options can be easily retrofitted
  • Minimal mechanical adjustments
  • Front end RX filter never needs realignment
  • Built in TX modulation alignment audio oscillator
  • Built in auto alignment software guides technician
  • Fast and simple disassembly
  • Built on proven technology
  • Configuration password protected
  • Virtual elimination of internal wiring
  • Elimination of helical filters, quadrature coils, MCF matching and trim potentiometers

 

OPTIONS

P25 Repeater Option Board
LZAST92
Transparent Mode:
Repeats Mixed Mode, P25 Digital and Analog transmissions.
Automatically switch to P25 mode on reception of P25 carrier.
Passes P25 NAC unchanged.
Passes P25 private call and group call.
Passes P25 clear or encrypted.
Front panel indicators show P25 status.
Benefits of Digital Audio Performance.
Design based around proven architecture.
Additional Options
Desk Mic/Palm Mic
Internal Simplex relay
Virtual PC Console including:
ANI/CTCSS/DCS/5TONE/DTMF display
Solar panel and battery power management system option board.
Universal system interface

ADVANCED FEATURES

N/A
 

GENERAL

SMX921

Frequency Bands
Band D3
Band L3
Band N2
Band O2
Band P2
Band Q
148-174 MHz
350-385 MHz
400-435 MHz
435-470 MHz
450-485 MHz
485-520 MHz
Synthesis Method Non mixing PLL Fractional N synthesizer
Modulation Direct FM two point method
Channel Spacing Programmable 25kHz / 12.5 kHz
Synthesizer Step Size 6.25kHz or 5kHz auto select
Channels 100 front panel selectable, 255 PC software selectable
Supply Voltage 13.8 +/‐ 20%
Operating Temperature ‐30 to +60C
Dimensions (W x D x H) 2RU Case, 325mm deep including fan
Standard LED indicators Power, RX, TX, Tone, Alert, Repeater
Standard Switches Two press button type
Standard Controls Volume knob, Squelch screwdriver adjust.
Interface Microphone accessory socket, speaker, rear connector DB25. Location for DB9 x 2, DB15, RJ45.
Weight 8kg

RECEIVER

Measured in accordance with TIA/EIA-603 Standards

Sensitivity Better than ‐120dBm for 12dB SINAD, Typical ‐123dBm
Selectivity 135-520 MHz Typical 90dB more than 75dB for 12.5kHz adj channel
Audio Bandwidth 300 Hz to 3000Hz (+1,-3dB)
Image Freq Rejection Better than 100dB
Spurious Response Immunity Better than 82dB, Typical 84dB
Intermodulation Immunity Better than 82dB (WB), 80dB (NB)
Blocking Better than 110dB at +/- 1MHz point
Distortion Less than 2% @ 60% deviation
S/N Ratio Better than 50dB (WB)
Better than 44dB (NB)
Co-Channel Rejection Better than 5dB
RF Switching Bandwidth Equal to band allocation
Receiver Front End BW Equal to band allocation
Receiver Audio Power 1 Watt

TRANSMITTER

Measured in accordance with TIA/EIA-603 Standards

RF Power Output 1W to 50W variable,
0.1 to 2W* UHF PA opt (1W nominal)
Frequency Stability >300MHz <300MHz 1.5PPM for –10 to 60C 2.5PPM for –30 to ‐10C
2.5PPM for –10 to 60C 5PPM for –30 to ‐10C
Audio Response Flat within +1, -3dB across BW
Audio Bandwidth 300Hz to 3000Hz.
Modulation Distortion Less than 2% @ 60% deviation
S/N Ratio Better than 50dB (WB)Better than 44dB (NB)
Conducted Spurious Emissions Better than ‐90dBc
RF Switching Bandwidth Full Sub band
RF Switching Bandwidth PA Full Sub band
Duty Cycle 100% for 50W RF output
RF Rise Time <50mS with VCO in cold standby