Icom IC-905 Base Station Amateur Transceiver Radio

Further details of Icom IC-905 Base Station Amateur Transceiver Radio

• Supplied Accessories: Accessory connector, CW KEY PLUG, OPC-2488 DC power cable, Controller cable (5 m), GPS antenna, HM-243 Speaker-microphone, Cushion sheet, RF unit bracket kit, U-bolt clamp kit, Spare fuse
• Power supply requirement: 13.8 V DC ±15% (control unit)
• Antenna impedance: 50 Ω
• RF unit: -10°C ~ 55°C, 14 ˚F ~ 131 ˚F
• Frequency stability: less than ±65 ppb (total deviation)
• GPS-controlled oscillator
• Power dissipation (at 13.8 V DC): RX Max. audio/standby less than 3 A/2 A (typical); TX Max. power less than 5.5 A
• Dimensions (W x H x D): control unit: 200 x 83.5 x 82 mm; RF unit: 172 x 87 x 210 mm
• Weight (approximate): control unit: 940 g (without included accessories); RF unit 3.2 kg (without included accessories)

Transmitter:
• Output power:
- 144, 430/440 MHz SSB, CW, FM, RTTY, DV : 10 W AM : 2.5 W
- 1200 MHz SSB, CW, FM, RTTY, DV, DD, ATV : 10 W AM : 2.5 W
- 2400, 5600 MHz SSB, CW, FM, RTTY, DV, DD, ATV : 2 W AM : 0,5 W
• Modulation system:
- SSB: digital PSN modulation
- FM: Digital Reactance Modulation
- AM: digital low power modulation
- DV, DD: digital GMSK modulation
- ATV: Digital Reactance Modulation
• Interfering radiation:
- 144, 430/440 MHz: less than -60 dBc
- 1200 MHz: less than -53 dBc
- 2400, 5600 MHz: less than -46 dBc
- Microphone impedance: 2.2 kΩ

Receiver:
• Receiver system:
- 144, 430/440 MHz: RF direct sampling
- 1200, 2400, 5600 MHz: down conversion IF sampling
- IF frequency:
- 1200 MHz: 1st IF: 331 ~ 371 MHz
- 2400, 5600 MHz: 1st IF: 914 MHz band, 2nd IF: 346 MHz band

The IC-905 is the industry’s first super efficient microwave base station with the RF unit designed to be at the base of the antenna, rather than in the shack. This design eliminates signal loss due to costly, long coax feed line runs found in legacy SHF designs.

Power Supplied through the Controller Cable. The DC power is supplied from the controller to the RF unit through the controller cable, making it possible to supply power with a low loss. Moreover, optional CX-10G’s power is supplied from the IC-905 RF unit.

Frequency accuracy and stability are required for SHF band operation. Even with a high-performance OCXO, the frequency gradually changes due to temperature and aging. To solve this problem, the IC-905 uses a high-precision 1 pulse-per-second (1 PPS) clock signal from an internal GPS (GNSS) receiver to enable advanced frequency control.