Radius SP21 Portable Radio
Technical
Specifications
| General Specifications | |
| Operating Frequency Range | VHF (151 - 159 MHz)*, UHF (462 - 470 MHz) |
| Channel Bandwidth | 12.5 / 25 kHz (programmable) |
| Channel Capacity | 1 |
| Power Supply Voltage | 7.2 volts DC (6 cell, 2/3 AF battery pack) |
| Dimensions | 4.5" H x 2.5" W x 1.2" T (114.3 x 63.5 x 30.5 mm) |
| Weight | 11 oz. (312 g) |
| Average Battery Life | @ 5-5-90 Duty Cycle Rechargeable Ni-Cad Battery: 8 hours |
| Seal Integrity | Satisfies IP52 specification |
| Shock Stability | Satisfies TIA/EIA 603 specification |
| Vibration Stability | Satisfies TIA/EIA 603 specification |
| High Humidity | Satisfies TIA/EIA 603 specification |
| Transmitter Specifications | |
| RF Output | 2W |
| Carrier Frequency Stability | 2.5 ppm |
| Modulation Limiting | +/- 2.5 kHz
(12.5 kHz Bandwidth) +/- 5.0 kHz (25 kHz Bandwidth) |
| Audio Sensitivity | 10 mV |
| Audio Distortion | 10% |
| Audio Frequency
Response (variance from a true 6 dB per octave pre-emphasis curve referenced to 1 kHz, from 300 Hz to 3 kHz) |
+1 to -3 dB |
| FM Hum and Noise Ratio | 34 dB |
| Radiated Spurious | -13 dBm |
| Emissions | (50 uW) † |
| Adjacent Channel Power Ratio | 50 dBc |
| FCC Modulation | 11K0F3E, 16K0F3E |
| Receiver Specifications | |
| Channel Spacing | 12.5 / 25 kHz (programmable) |
| Radiated Spurious Emissions | -57 dBm † |
| Reference
Sensitivity (12 dB SINAD) |
-119
dBm (0.25 uV) †† |
| Adjacent Channel Rejection | 50 dB |
| Spurious Response Rejection | 50 dB |
| Intermodulation Rejection | 50 dB |
| Audio Frequency Response (variance from a true 6 dB per octave de-emphasis curve referenced to 1 kHz, from 300 Hz to 3 kHz) | +1 to -3 dB |
| Hum and Noise Ratio | 34 dB |
| Audio Distortion @ 500 mW | 5% |
| Audio Squelch Sensitivity | 12 dB SINAD |
| Audio Output | 500 mW |