VHF Refuge Bay Radio
The Refuge Bay Radio was developed to be utilized in areas allocated as places of refuge within the mine. The Refuge Bay Radio allows communication on a pre-set frequency into the Leaky Feeder System.
Manufacturer: Sigma Communications Systems
Category:
SMARTTune VHF System
KEY FEATURES:
- IP65 Secure Steel Enclosure
- External Amplified Speaker
- Link Isolated Radio Nets by Fibre
- (Optional) Drop Bar Locking Tab
- (Optional) RX Indicator LED
The Refuge Bay Radio was developed to be utilized in areas allocated as places of refuge within the mine. The Refuge Bay Radio allows communication on a pre-set frequency into the Leaky Feeder System.
DESCRIPTION
Refuge Bay Radio System Components
- A steel enclosure which securely houses the radio, power supply and battery
- A VHF radio
- External high power speaker
- 220V AC Power Supply with battery backup
- Optional drop bar locking tab
- Optional RX indicator LED
The entire unit is fitted into an IP65 rated steel enclosure. The front panel of the unit has a PTT switch, microphone position and High power audio speaker which enables miners to communicate in the high noise environments effectively.
SPECIFICATIONS:
|
Frequency |
VHF 174MHz |
FM Hum and Noise |
46/40dB typ. (Wide/Nrrow) |
|
Number of channels |
16 Channels |
Hum and Noise (without CCIT filter) |
VHF 75dB typ. |
|
Type of emission |
16K0F3E/11K0F3E |
Audio harmonic distortion |
1.0%/1.5%typ. (Wide/Narrow) |
|
Channel spacing |
12.5/25kHz |
Sensitivity (at 12dB SINAD) |
0.25μV typ. |
|
PLL channel step |
VHF 2.5/3, 125kHz |
Adjacent channel selectivity |
VHF 78/70dB typ. |
|
Antenna impedance |
50 Ohms |
Spurious response rejection |
70dB min |
|
Operating temperature range |
-30 deg C to +55 deg C |
Intermodulation rejection |
VHF 54/50dB typ. |
|
Output power (at 7.2 V DC) |
VHF 5W, 2W, 1W |
Transmitter power |
30 dBm (1 Watt) |
|
Max frequency deviation |
±5.0 kHz/±2.5kHz (Wide/Narrow) |
Power supply requirements |
86 - 240 Vac |
|
Frequency stability |
±2.5ppm |
Unit size (Excluding Antenna) |
230 x 210 x 250mm |
|
Spurious emissions |
70dB min. |
Weight |
8.4 kg |
