User's Manual

SMR 700 800 HIGH POWER PS NFPA CLASS B SIGNAL BOOSTER
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless – Coverage
Date: 23-Nov-16
www.cobham.com/wireless
Doc. No.00060CDUM Rev. 3.4 Page | 10
2.4.2 Verifying the Link between the BTS and the Signal Booster
This test checks the signal strength from the BTS antenna to the Signal Booster.
Proceed as follows:
1. Using a Spectrum analyzer, measure the received signal from BTS at the Donor antenna port near the
Signal Booster.
2. Adjust the Donor antenna direction to receive the maximum signal strength.
3. Compare the received signal strength with the calculated signal strength from the design phase.
In case of discrepancy, check for one of the following:
• Antenna out of direction
• Antenna tuned to side lobe instead of main lobe
• Antenna connector or antenna cable faulty
• Line-of-sight problem (obstruction), etc.
4. Register the signal strength of the downlink channel for the system operation phase.
2.5 RF Cable Installation Guidelines
• For all coaxial connections to/from the Signal Booster - high performance, flexible, low loss 50 ohm
coaxial communications cable.
• All cables shall be weather-resistant type.
• If the coaxial cables are NOT weather-resistant type: wrap the exterior coaxial cables with insulation and
holding tape (Type 3M Rubber splicing tape) for environmental protection and to ensure longer lifetime.
• Cable length - determined by the Signal Booster installation plan. When calculating the cable length,
take into account excess cable slack so as not to limit the insertion paths.