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 (-30ºC 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
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Phone/Fax (434) 237-8255
78 Airpark Drive, Lynchburg, Virginia 24502
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