Planet WBT-1000 [10/12] Preparations

Planet WBT-1000 [10/12] Preparations
10
Preparations
In order to obtain the best performance of booster and system, user must
calculate the transmission power to meet the booster technical requirement and
FCC regulations. Please follow the calculation below:
1. Convert power of the radio device from milliwatt to dBm.
Note
10 * Log (milliwatt)
2. Estimate the attenuation of cable (please refer to manufacturer’s specications)
Note
It is suggested that the cable loss between booster and DC injector
should not exceed 10 dBm.
General Cable Attenuation List
LMR400 LMR600 LMR900
dB loss per meter
0.221 0.144 0.098
Suggested max. cable length (m)
45.24 69.44 102.04
3. Calculate the actual power of booster in the pole as follow:
Radio Device Power (dBm) Cable Loss (dBm) Misc. Loss = Input Signal Level
(dBm)
Note
Misc. Loss means loss of connector, adapter and DC injector and
estimates to be around 2 dB.
4. When the input signal level exceeds the Receiver Input Power of booster, the
booster can’t identify the input signal. Under this circumstance, user should
lower the input signal level to t the requirement such as using an attenuation
pad or a higher loss cable and vice versa.
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