I have a 5750 ap and a 5700 sm feeding a 900 ap these are located on two water tanks 8.5 miles away we can see them “barely” i can only achieve a 410 to 440 rssi jitter of 4 and 5 showing -81 db. spectrum analyss show ver low noise in the area all channels look good. oh and we are using the dishes from beehive. and one weird thing is from the ap side it shows like 200 to 225 rssi i will list the readings below.
In 2x mode i can only get a consistant 65 to 70 down link test with 50 to 65 uplink but in 1x mode i get 100% both ways consistanly over about 1 hr of link testing over and over stills show 100%.
i am thinking the link is stable but the rssi problem is being caused by the mteal tank disapating the rssi levels.
do you think this link will be sufficient and stable? if i keep it in 1x mode that is.
ap side
LUID: 002 : MAC: 0a-""-3e-f5-""-a0 State: IN SESSION (Encrypt Active)
Site Name : HSWT-MossWT SM
Software Version : CANOPY 7.2.9 Jul 23 2005 01:49:03
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 923 (approximately 8.57 miles (45227 feet))
Session Count: 10, Reg Count 7, Re-Reg Count 4
RSSI (Avg/Last): 212/219 Jitter (Avg/Last): 5/5 Power Level (Avg/Last): -78/-78
DnRate(S): 3500 DnLimit(S): 500000 UpRate(S): 3500 UpLimit(S): 500000 (kbit)
LoUpCIR(S): 0 LoDnCIR(S): 0 (kbps)
Rate : VC 18 Rate 1X/1X
sm side 7.29 also
Session Status REGISTERED VC 18 Rate 1X/1X
Registered AP 0a-""-3e-f2-""-e9
RSSI 442
Jitter 6
Air Delay 923 (approximately 8.57 miles (45227 feet))
Radio Slicing Value 406 (decimal)
Radio Transmit Gain Setting 17 (decimal)
Radio Power Level -80 dBm
LUID 2
IP Address 192.168.101.2
Registration Grant Status Normal
link test
Stats for LUID: 2 Test Duration: 6 Pkt Length: 1522
Downlink RATE: 3687936 bps
Uplink RATE: 3280042 bps
Downlink Efficiency: 100 Percent
Max Downlink Index: 100
Actual Downlink Index: 100
Expected Frag Count: 43218
Actual Frag Count: 43218
Uplink Efficiency: 100 Percent
Max Uplink Index: 100
Actual Uplink Index: 100
Expected Frag Count: 38438
Actual Frag Count: 38438
kmeadows
I would not leave this link in place to service remote AP’s. -70 is the lowest I would go regardless of the link test.
The beehives are +16dB gain, the Moto dishes are +18dB so you could pick up 4dB there (probably would not be enough difference to matter).
We are using one of the PacWireless 27dB grids on a BH20 and while it’s kinda flimsy, it works pretty well. If you had 27dB at each end, your 5750’s might work
If you were to go with 2400’s you might see an improvement in performance, but your partial LOS may be the killer.
If there is a way you can elevate the AP it may help. Also, spend extra extra time peaking the dishes. Start with the SM using the toner and get it as perfect as possible. Then do the AP side.
well i figured it out. I moved the dish down to the edge of the tank on a rail so it would not be picking up any scattered signals and it worked i was amazed i went from a 410 rssi to a 1250 rssi jitter of 1 and -59 db.
so i guess that metal top of the tank was the killer
kmeadows
nice - good to know.
kmeadows wrote: well i figured it out. I moved the dish down to the edge of the tank on a rail so it would not be picking up any scattered signals and it worked i was amazed i went from a 410 rssi to a 1250 rssi jitter of 1 and -59 db.
so i guess that metal top of the tank was the killer
kmeadows
is your 5.7 AP also on the tank? how well is it working?
We have AP Clusters on 5 Tanks around the city. We have seen different results on each. I would suggest that you are atleast 10 feet above the tank. We have a Combo of 5.2 and Cyclone 900 and anything lower then 10 feet on top of the tank we saw some issues. Now we do have some 900 Panel AP’s mounted on the side railings and they have worked just great for us. It is the reflection off of the tank causing the issues. Just some input.
it was the ap that i moved, that was the main issue. now everything seems ok so far.
kmeadows