Parts List/Tune Up Info

BIRD | 30303 AURORA RD, SOLON, OH 44139 | T: 440.248.1200 / 866.695.4569 F: 440.248.5426 / 866.546.4306 | WWW.BIRDRF.COM
X-COM SYSTEMS INC. | 1875 CAMPUS COMMONS DR, STE. 101 RESTON, VA 20191 | T: 571.612.5480 | WWW.XCOMSYSTEMS.COM
Tune up procedure DDR family RU
Applicant: Bird
FCC ID: EZZDDR406
Tune up procedure
User has the possibility to set the following parameters in the Remote unit via web based GUI
application:
• Gain Values (UL & DL)
•
ALC threshold (UL & DL)
• UL Test tone
User cannot adjust/align any frequency response, linearity response or detector calibration levels.
Remote unit has a built in ALC (Automatic Level Control) with preset levels, to make sure that
the
linearity or spectral spreading does not exceed the regulatory limits. All Bird remote units
and
repeaters have the ALC feature and functionality. The ALC threshold is a settable value
that defines
what output power is allowed from the RU/repeater. If an inserted signal plus the
set gain in the
RU/repeater exceeds the set ALC threshold the RU/repeater will automatically
reduce the gain so
that the output signal level always matches the set ALC threshold.
The device cannot end up in saturation due to the ALC (Automatic Level Control)
feature/functionality.
Saturation or over-modulation is even prevented for pulsed signal inputs w ith above described
functionality. There are also configurable signal threshold parameters in the remaining
components
of the DAS system [Base station Interface (BIU), Fiber Optical Interface (FOI), that
are used for proper
commissioning of the system so that these types of abnormalities
(overpowered input signals) are
eliminated.
UL Test Tone is a help feature tool used only when commissioning the DAS network.
DL ALC threshold for all DDR family Remote units is 33 dBm +/-1dB.