Equipos de radio utilizados
En nuestra estación terrestre disponemos de diferentes equipos de radio para diferentes bandas.
Para la banda de VHF disponemos de un transceptor Keenwood TM-241 y para la banda UHF de un Kennwood TM-441.
Otro dispositivo muy versátil es el receptor SDR dedicado a satélites FunCube Dongle.
Keenwood TM-241
Características:
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| GENERAL | |
| Antenna Impedance | 50 ohms |
| Current Drain Receive | Less than 600 mA |
| Current Drain Transmit | Less than 11 A |
| Dimensions (W x H x D) | 5.51 x 6.3 x 1.57 in. (140 x 40 x 160 mm) |
| Frequency Range | TX: 144 – 148 MHz RX: 118 – 174 MHz |
| Ground | Negative |
| Microphone Impedance | 500-600 ohms |
| Mode | F3E (FM), A3E (AM) (RX only: 118 – 174 MHz) |
| Operating Temperature Range | -20°C – 60°C |
| Power Requirement | 13.8V DC (±15%) |
| Weight (approx.) | 2.4 lbs. (1.1 kg) |
| RECEIVER | |
| Audio Output Power | More than 2W (8 ohms, 5% distortion) |
| Circuitry | Double conversion superheterodyne |
| Intermediate Frequency 1st IF | 10.7 MHz |
| Intermediate Frequency 2nd IF | 455 kHz |
| Selectivity -6 dB | More than 12 kHz |
| Selectivity -60 dB | Less than 24 kHz |
| Sensitivity (12dB SINAD) | Less than 0.16µV |
| Squelch Sensitivity | Less than 0.10µV |
| TRANSMITTER | |
| Frequency Tolerance | Within ±10 ppm |
| Maximum Frequency Deviation | ±5 kHz |
| Modulation | Reactance modulation |
| Modulation Distortion | Less than 3% |
| RF Output Power HI | 50 W |
| RF Output Power LO | 5 W |
| RF Output Power MID | 10 W |
| Spurious Radiation | Less than -60 dB |
Kennwood TM-441
Las especificaciones técnicas son similares al modelo anterior salvo el rango de frecuencia, en este caso es 430-440 MHz.
FunCube Dongle pro+
Este aparato es un receptor de radio SDR (software defined radio) diseñado especialmente para la recepción de satélites.
Specifications
- Guaranteed frequency range: 150kHz to 240MHz and 420MHz to 1.9GHz
- Typical frequency coverage: 150kHz to 260MHz and 410MHz to 2.05GHz
- TCXO specified at 0.5ppm (in practice about 1.5ppm)
- 192kHz sampling rate
- Extremely simple hardware setup, just two connections, an in and an out:
- Standard SMA female antenna port
- USB 1.x type A male connection
- Eleven discrete hardware front end filters including:
- 6MHz 3dB bandwidth (10MHz at -40dB) SAW filter for the 2m band.
- 20MHz 3dB bandwidth (42MHz at -40dB) SAW filter for the 70cm band
- Third- and fifth-order LC bandpass filters for other bands
- Front end LNA OIP3 30dB
- Typical noise figures:
- 50MHz 2.5dB
- 145MHz 3.5dB
- 435MHz 3.5dB
- 1296MHz 5.5dB
- Typical NFM 12dB SINAD measurements:
- 145MHz 0.15uV
- 435MHz 0.15uV
- No additional drivers required for Linux, OSX or Windows
- Integrated 5V bias T switchable from software
Toda la información de este receptor se puede encontrar en su página web www.funcubedongle.com para ser más precisos aqui, se podrá encontrar tanto documentación, como software, código fuente, etc…