Ubiquiti XR3

Frequency Response

The modem was configured at 5MHz increments from 5100MHz to 5900MHz, which should result in a sweep from 3100MHz to 3900MHz. The bandwidth was 20MHz and power was default. The horizontal scale above is 90MHz / graticule.

Last Output Filter Bypassed

For the following graph, the last bandpass filter in the transmitter chain was removed. Measurement power level was +20dBm.

Both Output Filters Bypassed

In the following graph, both transmit bandpass filters were bypassed. Measurement power level was +20dBm. In order to see all the harmonics without filters a wider measurement spectrum was recorded: from 2GHz to 6GHz.

Ignore the noise floor step at about 5.8GHz - that's an instrument (HP 8566A) artifact, not a component of the card's signal.


Filename Size Modified
XR3 - 6dBm.gif 3.1MiB 2016-08-06 00:16:18
XR3.gif 1.4MiB 2016-08-06 00:16:19
MBP2.53R3550S300B.DOC 87KiB 2016-08-06 00:16:18
XR3-Power-and-Frequency-Sweep.7z 37MiB 2016-08-06 00:16:19
XR3-NoOutputFilter.gif 2.8MiB 2016-08-06 00:16:18
XR3.zip 1.4MiB 2016-08-06 00:16:19
XR3-No-Filters-Broadband.gif 3.7MiB 2016-08-06 00:16:18
XR3-NoOutputFilter.zip 3.4MiB 2016-08-06 00:16:18
XR3-No-Filters-Broadband.zip 5.2MiB 2016-08-06 00:16:18