Product Manual

Product Manual for Tornado Radio Unit
50
Frequency Accuracy and
Stability
Better than +/-1 ppm
Transmitter (continued)
Adjacent Channel Power Ratio
(ACPR)
>60 dB
Transient ACPR
>60 dB
Intermodulation Rejection
>70 dB
Tx Occupied BW
50 kHz
40 kHz
25 kHz
20 kHz
12.5 kHz
10 kHz
Internal Duplexer
Type
Bandpass
Tx/Rx Split
5MHz minimum (400 MHz), 30 MHz (700 MHz), 9 MHz
minimum (900 MHz)
Frequency Range
400-430MHz, 420-450MHz, 440-470MHz
Stop Band Attenuation
>60dB @ >5MHz from centre (400 MHz), >75 dB (700
MHz), >60 dB @ >9Mhz from centre) (900 MHz)
Pass Band Bandwidth
2MHz (-0.5dB) (400 MHz), 3 MHz (-0.5 dB) (700MHz), 4
MHz (-0.5 dB) (900 MHz)
1. Sensitivity as specified includes forward error correction and internal duplexer loss. Note that systems
employing adaptive modulation (e.g MDL or MCAM) will automatically reduce the modulation order at a
signal level higher than the specified sensitivity level. This will maintain the lowest possible error rate.
Table 5: RF characteristics
8.2.6.1 Site Engineering
For personal safety and equipment reliability reasons the following must be adhered to:
Power supply
The equipment must be powered from a power supply complying with the requirements of IEC 60950-1 including
compliance with sub clause 7.4 ‘Insulation between primary circuits and cable distribution systems’.
Grounding
On site ground networks must be created in accordance with ITU-T Recommendation K.27: Protection against
Interference; Bonding Configuration and Earthing inside a telecommunications building.
Equipment location
It is recommended that the radio unit is installed in a dry, dust-free room. If this is not possible then the waterproof
boot must be fitted to protect the unit.
Equipment ventilation
A thermal study should be carried out for each site to check and ensure that thermal conditions within the
enclosures do not go beyond the radio units operating limit. If the temperature of the site is known to exceed the
operating limits of the unit, then the enclosure must have an air conditioning, or a forced air system installed to
stabilise these excursions.