Product Manual for Tornado X and Tornado XR
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NDL:
The Link LED lights up when an RF link is active.
RRU:
The Link LED has four different modes of operation each indicating a different RF link state. It is off when
the RRU is not detecting a signal from the BRU. It will flash with a 50 percent duty cycle at 1 Hz when the radio is
synchronised with the BRU. A pattern of two flashes followed by a gap will repeat at 1 Hz once a downlink is
established. And finally, it will be constantly on once a full duplex link is established.
BRU:
The Link LED operates with a time out of approximately two minutes. Every time communication occurs
between the BRU and one of its RRUs the timer will reset. Regular communication between the units will be
indicated by this LED remaining on.
Alarm LED (Red)
During boot up (proximally 10 seconds after power is applied) the LED will flash at a rate of 1Hz to indicate that the
radio is in its boot up process.
Once boot up is complete, the LED will flash when the radio is in an Alarm state.
Ethernet LEDs
Each Ethernet port has a green and an orange LED. The green LED flashes when the port is receiving data. The
orange LED is off when the port is 10 Mbit/s and on when it is 100 Mbit/s.
8.2.3
ESSENTIAL POWER REQUIREMENTS
8.2.3.1 Voltage Range
The operating input voltage range of the power supply is 10.5 to 60
VDC. This means that the voltage must not
rise above 60 VDC under idle conditions or fall below 10.5 VDC at full load.
8.2.3.2 Static Power Input
The typical power drawn when the transmitter is active is about 67.5W (maximum 73.5W). This occurs when the
two transmitter channels are operating at full power.
Note
: this assumes a 100% transmitter duty cycle as produced by the Base station radio. For the Remote radio,
the duty cycle is 25% and the typical power drawn values become about 22.5W (maximum 28.5W) respectively.
The power drawn via the internal switching regulators is nearly independent of supply voltage, except for some
additional converter loss at the top end of the voltage range, so that the input current to the RU is almost inversely
proportional to supply voltage, e.g. approximately 8.1A at 10.5V or 1.5A at 56V.This needs to be considered when
the power source is remote from the RU and cable loss is a factor.
Input Source Voltage (S)
Average Current in Amperes
= Iavg = 67.5/S
Circuit Breaker Current in
Amperes = Imcb = 1.5*Iavg
10.5 Volts
6.4 Amps
12.1 Amps
24 Volts
2.8 Amps
5.2 Amps
48 Volts
1.4 Amps
2.7 Amps
56 Volts
1.2 Amps
2.2 Amps
Table 1: Current draw assuming 100% Transmitter Duty cycle and 80% Efficiency of Power Supply
Input Source Voltage (S)
Average Current in Amperes
= Iavg = 22.5/S
Circuit Breaker Current in
Amperes = Imcb = 1.5*Iavg
10.5 Volts
2.1 Amps
2.4 Amps
24 Volts
0.9 Amps
1.1 Amps
