Case

LigoPTP 5-N 20 km performance test in Hungary by
a leading WISP – ZNET

Link information

Devices	LigoPTP RapidFire 5-N
Link distance	19,6 km (12,2 mi)
Coordinates	Device 1: 46°38’17.49″N, 16°50’16.64″E Device 2: 46°26’53.20″N, 16°47’24.15″E
Landscape	flat
Other environmental factors	fog
Antenna	34 dBi (120 cm) Grante HPA dual-pol dish

Link path analysis

Path profile between TX and RX sites

Spectrum analysis

The 5 GHz frequency range in the area where the link was installed had a considerable amount of noise. This screen shot illustrates the noise floor 4 Point-to-Point Profile at the site. The LigoPTP RapidFire has
a new, integrated spectrum analyzer, which illustrates not only waveforms of peak, average and current noise, but also a waterfall graph in order to see noise over time

Link statistics

The signals achieved on both sides were in the -40 to -50 range and this allowed using the highest QAM 256 modulation even on a 80 MHz channel. Other statistical information about the link can be found in the screenshot of the new user interface above.

Link test

There are various ways to measure the throughput on LigoPTP RapidFire devices. One of them is using a link test from the tools section of the user interface. The screen shot shows the test results with different packet sizes. The max capacity in this case was 556 Mbps and the max PPS (packet per second rate) was 135,000. Alternatively, there is an Iperf tool running on the device that can be accessed via console. The
table below shows link performance in different directions when generating UDP traffic