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Confidential, Proprietary Information
Title: PCS FlexBeamer
®
RF Repeater
System A &O Manual
Doc. No.:
913002500
Rev.: 00
Page: 44 of
80NUMPAGES
3.2.3. Repeater Up-Link (UL) Gain Setting
The overall UL gain is settable in the range of : 35dB to 95dB.
1. Set the FLEXBEAMER® LNA’s gain to +30 db ( DCA set to 0db attenuation).
2. Set the repeater UL RAC and BAU amplifiers (UL Rx ABT, UL Tx ABT, BAU P.A) gain to
minimum. This corresponds to a total UL gain of 50dB, including the FLEXBEAMER® amplifiers
3. Drive with a MS to the far – out border of the Repeater coverage area, and observe the Mobile
Tx Power (in test mode). Operate the repeater Remote Control SW to remotely control the RAC
UL amplifiers gain.
3.1 If the Mobile Tx Power is maximum (+23dBm), increase BAU UL PA Amplifier gain in
1dB steps until the Mobile Tx Power drops 2 dB bellow its maximum. If required , increase
the gain of the UL Rx ABT and than the gain of the UL Tx ABT.
3.2 If the Mobile Tx Power is less than 2db below its maximum (+23dBm), decrease the
FLEXBEAMER® Rx Gain in 1dB steps, Until the MS reaches the maximum of +21dbm
Mobile Tx Power.
*Note: This procedure guarantees a fade margin for UL of 2 db. In practice, the Operator should utilize
the required fade , according to the Site Planning rules. More margins are possible by further increasing
the UL repeater gain and observing the lower MS Tx Power. This should be tested in a drive tests along
the distribution side coverage border.
NOTE
The UL main and Diversity should be equalized: Measure power out of the BAU while attenuating the
main or diversity gain by –15.5 dB.
3.2.4. Repeater DL gain Fine Tuning
For optimum DL and UL balancing it is recommended to have additional fine tuning
procedure performed on the DL, after going through the previous processes.
1. Drive with a MS to the outskirt bounderies area of the Repeater coverage area ( the same
coverage border you have set for the UL) and observe the Mobile Ec/Io (in test mode).
2. Operate the repeater Remote Control SW to control the FLEXBEAMER® System
DL amplifiers Chain.
3. If the Mobile Ec/Io is low or marginal ( Ec/Io -14db ) increase RAC DL Amplifiers
( DL Rx ABT, DL Tx ABT) gain in 1dB steps until the Mobile Ec/Io is set to the
Operator’s network design desirable values.
4. If the Mobile Ec/Io is high at the Coverage border, decrease the RAC DL amplifiers (
DL Rx ABT, DL Tx ABT) Gain in 1dB steps, Until the MS Ec/Io reaches the
Operator’s Network Design desirable values.
This Concludes the Repeater Optimal gain Setting..