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SD-174 UHF Synthesized RF Data Radios

Frequency Range UHF: (450 MHz - 490 MHz)
Channels 16 (Dip switch selectable or external
      serial command)
Channel Spacing 25 / 12.5 kHz
PLL Step 5.0 / 6.25 kHz
Channel Spread 40 MHz
Antenna Impedance 50 ohms
Operating Voltage 7.2 V DC to 18V DC ±20%
Operating Temperature -22ºF to 140ºF (-30ºC to 60ºC)
Frequency Stability
   (-30
ºC to +60ºC)
± 2.5 ppm
Current Draw RX <65 mA
Current Draw TX <1.0 A
Attack Time RX to TX 20 ms
Attack Time TX to RX 20 ms (no power saving)
PLL Lock Time 10 ms
Squelch Attack Time  
   RF Level at Threshold 40 ms
   RF Level at Threshold + 20dB 30 ms
   Squelch Attack Time 5 ms min., 20 ms max.
Baud Rate GMSK Up to 9600
Baud Rate FFSK Up to 4800
Dimensions (H x W x D) 4-15/16" x 2-5/16" x 1-1/4" (125x58x32 mm)
Weight 8.9 o. (253 g)
FCC Identifier O7KSD174
FCC Compliance Parts 22, 74, 90.210
Canada Certification Number 3690A-SD174

Transmitter (measurements made per ANSI/TIA/EIA-603)

RF Output 5 Watts
Spurious and Harmonic Emissions 60 dB
Modulation 11K0F3E, 16K0F3E, 19K6F3D
FM Hum and Noise (12.5 & 25 kHz) 40 dB @ 12.5 kHz;  40 dB @ 25 kHz
Audio Distortion 2%
Unfiltered Modulation 100m V rms (input)
    7m V rms (faltered modulation input)

Receiver (measurements made per ANSI/TIA/EIA-603)

Sensitivity 12 dB SINAD 0.25µV@12.5 kHz;0.25µV@ 25 kHz
Selectivity 65 dB @ 12.5 kHz; 70 dB @ 25 kHz
Intermodulation 70 dB @ 12.5 kHz; 70 dB @ 25 kHz
Spurious Response  65 dB @ 12.5 kHz; 65 dB @ 25 kHz
Audio Output 250 mV @  8 ohms (filtered)
    250mV rms @ 10K ohms (unfiltered)

 

Features / Functions

  • 2 Watts and up to 16 channels
  • CTCSS / DCS Tone signaling
  • Scan
  • LED Status indicator
  • Time-out-timer function
  • Busy channel lockout
  • Marked idle
  • TX Delay
  • Courtesy beep
  • Power save
  • Die-cast aluminum housing with mounting holes

 

Phone/Fax (434) 237-8255
78 Airpark Drive, Lynchburg, Virginia 24502

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