# Tether Bandwith Problem

**URL:** https://discuss.bluerobotics.com/t/tether-bandwith-problem/8194
**Category:** Blue Robotics Software
**Created:** [September 18, 2020, 11:22am UTC](https://discuss.bluerobotics.com/t/tether-bandwith-problem/8194 "2020-09-18T11:22:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![gorkemsavran](https://avatars.discourse-cdn.com/v4/letter/g/a8b319/32.png) [@gorkemsavran](https://discuss.bluerobotics.com/u/gorkemsavran)
#### Post date: [September 18, 2020, 11:22am UTC](https://discuss.bluerobotics.com/t/tether-bandwith-problem/8194/1 "2020-09-18T11:22:00Z")

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Hello everyone I have a puzzle for you,

We have two BlueROV2s, one of them is old(2 years old) and the other is brand new. We have three tethers: A tether(200m), B tether(300m), C tether(300m).

Today, we tested both ROVs on the workplace with all three tethers.  
Old ROV + A tether(200m) = 50 - 60 Mbps  
New ROV + A tether(200m) = 30 -40 Mbps

Old ROV + B tether(300m) = 8 - 18 Mbps  
New ROV + B tether(300m) = 40 Mbps

Old ROV + C tether(300m) = 29 - 43 Mbps  
New ROV + C tether(300m) = 50 - 55 Mbps

We have never seen a bandwith problem with Old ROV until today.  
By the way, we tested many times, everytime results are very close.  
The question is why Old ROV with B tether produce 8 - 18 Mbps bandwith?