Rocket link problems

[thelli]

Hi
I have a small problem, have a point to point link 2 pice og Rocket and 17dbi antenna
and have a fiber connection on 50/50 Mbits, have put up the link. make a speed test and only get about 30/18 Mbit is there a wrong settings of the rockes or somthin else ??

Access point
Device Name: AP-uplink
Wireless Mode: Access Point
SSID: EB-link-uplink
Security: WPA Version: v5.0.2
Channel/Frequency: 112 / 5560 MHz
Channel Width: 40 MHz
ACK/Distance: 31 / 0.9 miles ( 1.5 km)
TX/RX Chains: 2X2
Connections: 1
Noise Floor: -96 dBm Transmit
CCQ: 80-100 %
AirMax: Enabled AirMax Quality: 80 - 91 %
AirMax Capacity: 60 - 74 %

Station
Device Name: Uplink
Wireless Mode: Station SSID: EB-link-uplink Security:
WPA Version: v5.0.2
Uptime: 00:14:42 Date: 2009-10-23 20:13:40
Channel/Frequency: 112 / 5560 MHz
Channel Width: Auto 40 MHz
ACK/Distance: 27 / 0.6 miles ( 0.9 km)
TX/RX Chains: 2X2
LAN: Unplugged LAN1/LAN2:
Signal Strength: -59 dBm
Chain 1 / Chain 2: -60 / -72 dBm
Connections: 1
Noise Floor: -96 dBm
Transmit CCQ: 100 %
TX/RX Rate: 270.0 Mbps / 243.0 Mbps
AirMax: Enabled
AirMax Quality: 89 %
AirMax Capacity: 73 %

[Dave-D]

A couple of thoughts.

First, are you operating legally? In the
UNII-2e band you're in, rf power is limited
to 250mW and DFS must be operating.

Because you're operating on such a short
link, I believe the NS M5 would be OK.

Have you tried this link with AirMAX
turned off? Do you have auto-ACK on?
If so, try it off, with about a 1.2x
setting of the actual distance.

The tx/rx rates of over 200Mhz seems
a bit over-stated. If they're good, you
should have much better throughput.

I see there's a 12dB difference between
the chains. That seems a bit high to me.
You might try moving the antennas
slightly to improve this. Dave

[thelli]

A couple of thoughts.

First, are you operating legally? In the
UNII-2e band you're in, rf power is limited
to 250mW and DFS must be operating.

Because you're operating on such a short
link, I believe the NS M5 would be OK.

Have you tried this link with AirMAX
turned off? Do you have auto-ACK on?
If so, try it off, with about a 1.2x
setting of the actual distance.

The tx/rx rates of over 200Mhz seems
a bit over-stated. If they're good, you
should have much better throughput.

I see there's a 12dB difference between
the chains. That seems a bit high to me.
You might try moving the antennas
slightly to improve this. Dave

There can me somthing wrong with the Rocket (station) it fall a sleep, can't connect to it by interface. have to power it up again, then is ok - 15min the same again, I try to switch it, when the wheter is ok, is windy, and we have to clime 45m up
the AP have the connection to the station

[Dave-D]

Sorry to hear that.

How long is your CAT5 cable?
Are you using shielded (FTP)
type cable? What voltage is
your PoE unit? If this is on a
tower, are you using transient
(lightning) suppression? Dave

[skyhook]

Have you tried disabling AirMax? This is a PtP link or not?

[UBNT-Mike.Ford]

Hello,

1. How are you testing the speed?

2. Have you tried Airmax on and off?

3. What is the link distance?

Thanks,

Mike

[thelli]

Hello,

1. How are you testing the speed?

2. Have you tried Airmax on and off?

3. What is the link distance?

Thanks,

Mike

1. whit a speedtest on http://www.speedtest.net/
2. Yes
3. max 1.5 km
but the rocket fall to sleep, have to power it off, and then is ready ??

[thelli]

Sorry to hear that.

How long is your CAT5 cable?
Are you using shielded (FTP)
type cable? What voltage is
your PoE unit? If this is on a
tower, are you using transient
(lightning) suppression? Dave

the cabel is 45m long cat6,
the poe is that is deleveret with rocket
no transient suppression

[skyhook]

1. whit a speedtest on http://www.speedtest.net/
2. Yes
3. max 1.5 km
but the rocket fall to sleep, have to power it off, and then is ready ??

1. use a better speed tool, like Mikrotik BTEST o IPERF....

[Dave-D]

Thelli, if you're mounting this radio on a
40m tower without shielded (FTP) cable
and without transient protection, you
could have all kinds of problems.

Without proper grounds, a radio can build
up a high-voltage charge that would
make it erratic or fail. And I would use
an external CAT5 transient protector
and not rely only on the PoE device.

If your antenna is metal and is mounted
on a metal tower, be sure the tower itself
is properly grounded.

Can you confirm your installation details? Dave

[thelli]

Thelli, if you're mounting this radio on a
40m tower without shielded (FTP) cable
and without transient protection, you
could have all kinds of problems.

Without proper grounds, a radio can build
up a high-voltage charge that would
make it erratic or fail. And I would use
an external CAT5 transient protector
and not rely only on the PoE device.

If your antenna is metal and is mounted
on a metal tower, be sure the tower itself
is properly grounded.

Can you confirm your installation details? Dave

For me is not a installation problem, I have on the same tower 8 Mikrotik Acesspoint witout any problems, same cabel...
I think there is a software/hardware problem

[UBNT-Mike.Ford]

Hello,

What version of the firmware are you on, and have you tried using a Jperf to test the speed of the links?

Thanks,

Mike

[jp498]

You really should not be using 40mhz if you can get away with less. You've got a 50mbit connection; probably 20mhz or even 10 might do the job. 20mhz means half as much interference as 40mhz. This could be a problem with so many other transmitters at the site you mentioned.

Also adjust upward the ack settings as is described in the various threads here.

[Dave-D]

Just because another brand works
does not mean you can ignore
shielding and grounding for your
Ubiquiti products.

I don't know what your problem is;
I suspect it is several problems. I
suggest you fix the shield problem. Dave