Motorola Solutions Inc. 99FT6001 사용자 설명서

4-4

Electrical Connections Frequency Stability

The selection of the antenna is critical to system performance. The selected antenna must be 

 

50 ohm impedance and capable of at least 50 watts. Gain antennas may be used to increase system 
coverage. Please take note of licensing restrictions when selecting gain antennas. Some services or 
regions may have antenna gain or system ERP limitations. 

The antenna must be connected to the duplexer with a high grade 50 ohm transmission line 
(hardline). The line must have connectors to match the connectors on the duplexer and antenna. 

 

For proper antenna installation, please also consult the Motorola Quality Standards Fixed Network 
Equipment Installation Manual R56 (6881089E50).

The 800/900 MHz repeaters are equipped with a high-stability, 0.1 ppm OCXO (oven controlled 
crystal oscillator).  This oscillator requires approximately 10 minutes of warm-up time (worst case 
scenario) to meet the frequency stability requirements of the 900 MHz band.

It is important that all antenna cables are grounded at the point they enter the 
building.

The antenna design is the customer's responsibility. All aspects of the antenna 
design must comply with the relevant local regulations.