4.4 | SPECIFICATIONS |
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4.4.1 | Transmitter |
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| Channels | 53 US/International |
| Frequency Stability | ±10PPM (±0.001%) |
|
| |
| Frequency Range | 156.025 to 157.425 MHz |
| Channel Spacing | 25 KHz Increments |
| Power Output | 25 Watts switchable to 1 Watt into 50 Ohms at |
|
| 13.6 Vdc |
| modulation | Frequency modulated 16F3 |
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| (±4.5 KHz at 1000 Hz) |
| Modulation Audio Response | Shall not vary |
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| from 300 to 2500 Hz, reference 1000 Hz. Audio |
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| frequences |
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| 60 log f/3 dB. Above 20 KHz by 50 dB) |
| FM Hum & Noise Level | Greater than |
| Audio distortion | Less than 10% at 1 KHz for ±3 KHz deviation |
| Spurious & harmonic Emissions | Attenuated at least 43+10 log Po (below rated |
|
| radiated carrier power) per FCC Rules Parts 2 & 80 |
| Antenna Impedance | 50 Ohms |
| Transmitter Protection | Shall survive open or short circuit of antenna |
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| system without damage (10 min. test) |
4.4.2 | Receiver |
|
| Channels | 93 (includes 10 weather channels) |
| Frequency Range | 156.025 to 163.275 MHz in 25 KHz increments |
| Frequency Stability | ±10 PPM (±0.001%) from |
| Usable Sensitivity | 0.3µV for 12 dB (SINAD) |
| Squelch Sensitivity Threshold | 0.2µV or better |
|
| 1.0µV full squelch |
| Adjacent Chl Rejection | Greater than 65 dB |
| Spurious Image Rejection | Greater than 65 dB |
| Intermodulation Rejection | Greater than 65 dB |
| Audio Output | 3 Watt or more at 10% or less distortion into 4 Ohm |
|
| load |
| Hum & Noise in Audio | Less than |
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