Bandwidth and latency testing

General Discussion
1

Hi everyone,

Im interested to see what everyone’s Uplink and downlink rates are with reference to length of tether and if you are using a slipring or not.
My system is working great, but i have an uplink of 37 Mbps and a downlink of 48 Mbps. I have 275 m tether through a slip ring. not sure if this is good, bad or goldilocks.

Thanks

Paul

1 Like
2

I would say this is really good.

I usually get around 25mbps at 300m.

3

For me, with 200m slim tether, 30 à 40 mbps maxi…

4

With 150m of tether and slip ring, with my laptop mid to upper 70’s up and download. With my toughbook a little less mid 60’s.

5

Thanks everyone.
It’s good to have some numbers to compare.
Looks like my bandwidth is certainly similar to others.

6

Just checking here about Bandwidth and latency testing.

Does anybody know why the download stream behaves like that? (speed goes up to 50mb/s and suddenly falls down to around 15Mb/s and then climb back up again).
Untitled

Download: 50 Mbps
Upload: 76 Mbps

Details about the unit:

BR2 - Regular
100M Slim tether
Fathom-X
Blueos: v1.1.0
ArduSub: 4.1.1
QGC: v4.3.0

7

Hi @Thor -
The speed test is something that needs improvement, and is being worked on. From what I understand, in some ways you’re measuring the Raspberry Pi disk write/read performance in the test, hence the behavior of a peak at the start, as buffers are filled? The results you’re seeing look nominal for a slim tether @ that length!

8

I was not sure about this. Thank you, Tony, for clarifying this for me.