What pigtails and connectors? Mmcx on the SR5 or u.fl? are these new SR5's or older sr'5s?
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Blair Davis > Sent: Thursday, February 09, 2006 2:08 PM > To: WISPA General List > Subject: [WISPA] MikroTik 5.8GHz Radio cards and settings. > > Hey all: > > I'm getting some odd results here with a PtP 5.8GHz link using MikroTik > that I setup to test with. Let me describe the setup... > > The link is 7.9 miles with clear LoS and clear Frenel zone. Each end > has a 27db grid with a 3ft LMR-400 jumper to the MikroTik radio. > > Using the link calculator at > http://www.zytrax.com/tech/wireless/calc.htm I get a predicted rx of > -60.8db at each end with CM9 radio cards (17db output). Using the SR5 > cards, (400mW), I get a predicted rx of -51.8 > > On to the real world results.... (all reading taken from the MikroTik's > winbox. I am using version 2.9.11 on RouterBoard 230's) > > With the CM9 cards, I get a measured rx of -62db, well within the margin > of error. An interesting note here is that I must set the CM9's output > power in the MikroTik at 30db to get these results.. I know that the > MikroTik must be doing something odd with this setting, as the CM9 can > not put out 30db. Reducing the setting drops the rx strenth by a like > amount. This link is stable and will pass 30Mb/sec in UDP and 22Mb/sec > in TCP mode > > With the SR5 cards, I get a measured rx of -66db, well outside the > margin of error and 15db below the expected rx strength! An interesting > note here is that I must set the SR5's output power in the MikroTik at > 30db to get these results. I know that the MikroTik must be doing > something odd with this setting, as the SR5 should not put out 30db. > Reducing the setting drops the rx strength by a like amount. This link > is stable and will pass 24Mb/sec in UDP and 16Mb/sec in TCP mode. > > Nothing else is changed when I swap the SR5's for the CM9's or back > again. I use the same antennas, cables, boards and pigtails. The > antennas and cables are not moved between tests. (except for moving the > pigtail from one card to the other). > > Can anyone tell me what I am doing wrong here? Or do I just have some > bad SR5 cards? Or is the tx power setting in the MikroTik flakey? Or > is the tx power setting relative db not absolute db? > > BTW, I will be changing one end to a sector and wish to use the SR5 > cards then. Otherwise I'd be happy with the -62 on the CM9's > > Thanks in advance. > > -- > Blair Davis > > AOL IM Screen Name -- Theory240 > > West Michigan Wireless ISP > 269-686-8648 > > A division of: > Camp Communication Services, INC > > -- > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.15.3/254 - Release Date: 02/08/2006 > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.3/254 - Release Date: 02/08/2006 -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
