User's Manual

Uniwave Initial System Setup

User Manual

interrupted.

In this section, the user can set the start time for the system maintenance window. Only one action will

occur at a time in the order (when more than one is scheduled): Software Installation, RF Calibration

then System Check. The user can also check the status of any scheduled actions.

Note: For a software upgrade where the installation is scheduled by System Maintenance, all software

file transfers must have completed before the System Maintenance Start Time (and Day, if specified).

Otherwise, installation will be delayed until the next System Maintenance window for software

installation.

RF Calibration performs an end-to-end (Service Module input/output to the Remote Unit DL/UL ports)

system calibration. The user can enable a recurring calibration on a specified schedule. The user can

also perform a one-time RF Calibration.

Note: RF Calibration values are stored in non-volatile configuration memory. The user is able to clear

all existing RF Calibration values, if desired, by clicking the ‘Clear RF Calibration’ button at the bottom

of the screen.

System Check performs a system-wide scan to measure the RF isolation between TX and RX

antennas on the same Remote Unit, as well as between the neighboring Remote Units. It also checks

the RU PA gains and establishes 48V power port mappings between RUs and Secondary Hubs and

any RM-PSU present.

The antenna check is performed by transmitting a test signal from the Primary Hub through each

Remote Unit. The 308-xxxx system selects test tones at 2400, 2440 and 2483 MHz. Commercial

services are disconnected during this phase. As with the RF Calibration, System Check can be

scheduled to reoccur in user-specified maintenance windows or be performed on a one-off basis. The

Full System check (includes antenna cross coupling between multiple Remote Units) of a 64 Remote

Unit system (i.e. maximum number of Remote Units on a Primary Hub) should take approximately 15-

20 minutes. It is recommended that the Full System check is done during the original system

commissioning. Select Omit antenna cross-coupling if a more limited antenna scan with reduced run-

time is required.

Note: the TX-RX antenna isolation for an RU will be reported with ‘>=’ (greater than or equals symbol)

pre-pended if the value measured was impaired by background noise/interference at the time of the

measurement. This occurs when the measurement with an active test tone is not at least 1dB above

the maximum background noise level recorded when the test tones were off. All we can be certain of

is that the TX-RX antenna isolation will not be lower than the value shown. It is also possible that the

TX antenna may be disconnected in this scenario.

When the symbol ‘-‘ is displayed in place of a TX-RX isolation number in the report, this represents an

unmeasurable TX-RX antenna isolation. The measured RX signal level was not sufficiently above the

RU RX noise floor. This could be due to either antenna being disconnected, or a very high TX-RX

antenna isolation condition, due to wide antenna separation or low antenna gain at the frequencies

used for the test.

It is important that the System Check is run when the building is as quiet as possible (e.g. 2am), to

minimize measurement errors due to background RF noise. The wide-band RU RX power

measurement cannot distinguish between wanted power for test (from RU Tx signal), and other uplink

background noise power received. Inconsistent antenna isolation or cross-coupling measurements

may occasionally be logged due to some background interference being present in that location at the

time of the test. Logging and comparing isolation measurements obtained over a number of System

Check runs should help highlight where to focus on-site attention.