User's Manual

Uniwave Initial System Setup

User Manual

PA Health is highlighted amber when there is 8dB or greater difference between the Tx output power

and the expected level from measuring the input power and red if there is no measurable output

power. A fault may actually be due to mismatch at the Tx port of the RU, rather than the PA.

If the background RF pickup is > -30dBm when the DAS is off it shows amber; if it is > -20dBm it shows

red. The test for each RU includes an “off” measurement and 3 test frequencies, so for a test on each

transmitting RU there are many “off” measurements measured on all of the Rus. This is presented as

a range of values, giving an indication that the background pickup might be “bursty”.

If Tx-Rx isolation is in the range -45 to -40dB, it shows amber; if it is more coupling than that it shows

red; if the background RF pickup was strong enough to compromise the measurement, it also shows

as amber and the result has “>=” added to the result text. It means that the Tx-Rx isolation measurement

had a smaller received level than the Rx level when the DAS was off.

If cross-coupling is in the range -50 to -45dB it is shown as amber; stronger than -45dB is it red. Strong

coupling from one RU’s Tx to another RU’s Rx is not to be expected.

Sample RF System Check View showing two RUs amber highlighted “Tx/Rx Antenna Isolation (dB)”

values due to the “>=” prefix.