Below are the results from a marginal registration (no fade, so we won’t be installing).
In this case there is a 100% uplink and 65% downlink.
As part of my ongoing efforts to better understand RF and the Canopy product, could I get you’re your thoughts as to what would cause such an uplink/downlink disparity.
Subscriber Modem Stats
Session Status REGISTERED
Registered AP 0a-00-3e-90-19-08
RSSI 1311 (-83 dBm)
Jitter 3
Air Delay 52 (approximately 1.45 miles (7644 feet))
AP List
Current entry index: 0
Index: 0 Frequency: 915.0 MHz ESN: 0a-00-3e-90-19-08
Jitter: 3 RSSI: 1355 Power Level: -81 Beacon Count: 16 BRcvW: 0
Type: Multipoint Avail: 1 Age: 0 Lockout: 0 RegFail 0 Range: 2548 feet TxBER: 0 EBcast: 0
Session Count: 3 NoLUIDS: 0 OutOfRange: 0 AuthFail: 0 EncryptFail: 0 Rescan Req: 0
FrameNumber: 1551 SectorID: 0 Color Code: 26 BeaconVersion: 1 SectorUserCount: 0
Frequency: 9150 NumULHalfSlots: 12 NumDLHalfSlots: 37 NumULContSlots: 0
Current Results Status
Stats for LUID: 7 Test Duration: 10
Downlink RATE: 1092403 bps
Uplink RATE: 419635 bps
Downlink Efficiency: 61 Percent
Max Downlink Index: 96
Actual Downlink Index: 59
Expected Frag Count: 21336
Actual Frag Count: 35612
Uplink Efficiency: 100 Percent
Expected Frag Count: 8196
Actual Frag Count: 8196
Subscriber Modem Stats
Session Status REGISTERED
Registered AP 0a-00-3e-90-19-08
RSSI 1372 (-79 dBm)
Jitter 2
Air Delay 51 (approximately 1.42 miles (7497 feet))
AP List
Current entry index: 0
Index: 0 Frequency: 915.0 MHz ESN: 0a-00-3e-90-19-08
Jitter: 3 RSSI: 1276 Power Level: -83 Beacon Count: 16 BRcvW: 0
Type: Multipoint Avail: 1 Age: 0 Lockout: 0 RegFail 0 Range: 2499 feet TxBER: 0 EBcast: 0
Session Count: 4 NoLUIDS: 0 OutOfRange: 0 AuthFail: 0 EncryptFail: 0 Rescan Req: 0
FrameNumber: 2021 SectorID: 0 Color Code: 26 BeaconVersion: 1 SectorUserCount: 0
Frequency: 9150 NumULHalfSlots: 12 NumDLHalfSlots: 37 NumULContSlots: 0
Current Results Status
Stats for LUID: 7 Test Duration: 10
Downlink RATE: 1132953 bps
Uplink RATE: 383334 bps
Downlink Efficiency: 65 Percent
Max Downlink Index: 96
Actual Downlink Index: 62
Expected Frag Count: 22128
Actual Frag Count: 35128
Uplink Efficiency: 100 Percent
Expected Frag Count: 7487
Actual Frag Count: 7487
I am by no means an expert on this Canopy yet (and have no 900), but I would suspect two things:
1) interference close to the SM (especially because it is 900)
-you could try a new freq. or a reflector
2) the SM isn’t alligned correctly (even though you have good RSI and jitter) - you could be receiving a reflection signal
-check allignment, or again use a reflector
I would think that both problems would show up as multiple registrations on the sessions page.
Interferrence seems most likely. At 915 it is probably another 900 system, although 929 paging is a possibility if it is close.
First, an RSSI of 1311 is not acceptable in 900Mhz. I know what the manual says, but you must have a consistent RSSI of 1370 or higher to maintain a viable signal.
Second, try changing your AP frequency… I have found that in 900, changing your frequency to the adjacent channel usually solves the problem you’re having. As has already been said, something is kicking you off 915.0.
P.S. I haven’t heard of there being a reflector for the 900Mhz radio, but you could also try a yagi antenna if you’re looking for a few more db.