Right, if you have LMR400 and the cable run is 100' then you would enter: cableloss 1.5 2.3 3.9
For 200' you would enter: cableloss 3.0 4.6 7.8 Here is an online calculator where you can enter specific cable lengths: http://www.timesmicrowave.com/cgi-bin/calculate.pl The targetrssi also plays into the MSE reading. I typically start with what RSSI is expected and then take into account any variables that may attenuate the RSSI (eg. Building glass etc.). Brad -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gino Villarini Sent: Tuesday, December 02, 2008 10:44 AM To: WISPA General List Subject: Re: [WISPA] Trango Giga Link - Lowering MSE I'll try the the larger calbe loss numbers .... AFAIK I just need to input the cable loss for a 100' run or is the actual calbe loss number needed ( cable loss per ft * cable run) Gino A. Villarini [EMAIL PROTECTED] Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brad Belton Sent: Tuesday, December 02, 2008 12:34 PM To: 'WISPA General List' Subject: Re: [WISPA] Trango Giga Link - Lowering MSE We ran into a problem with noise being picked up by the IDU/ODU cable due to less than adequate shielding. Once we replaced the cable with LMR400 the MSE's came right up to where they were supposed to be. The Belden 9913 cable has similar loss characteristics, but how does the shielding compare to LMR400? We have also found that some Giga radios prefer higher than calculated cableloss settings. For example we have one radio's cableloss settings nearly double what is calculated for the cable run. Brad -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gino Villarini Sent: Tuesday, December 02, 2008 10:16 AM To: WISPA General List Subject: Re: [WISPA] Trango Giga Link - Lowering MSE Brad and Travis, Thanks for your help I turned down both ends to 0 power. I have -41 on the local end and -46 on the remote. MSE went to -31 on the local, -20 on the remote. Changing power on the local unit from 0 to 15 don't affect the remote MSE at all, it stays in the 15-20 range. Checked cable loss settings, and changed if from lmr400 to belden 9913, (no big change on numbers, no chenge on MSE) ATPC is off, targerrssi is still in -26 Any other ideas??? Gino A. Villarini [EMAIL PROTECTED] Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Travis Johnson Sent: Tuesday, December 02, 2008 10:27 AM To: WISPA General List Subject: Re: [WISPA] Trango Giga Link - Lowering MSE I would continue to turn the power down (probably to 0) and see if that helps. We had a -35 on our link (at +20db power) and had to turn it down to +13db to get a -42 and then the MSE went from -20ish to -33ish. I would do it on the "local" side first, to see what happens in case the link completely drops out. Travis Microserv Gino Villarini wrote: > Hey Guys > > I got a .7 mile 23 ghz Trango Giga Link that Im provisioning > > Antennas are peaked at -26, using 50 mhz channles 256 qam. Tx power > is at 15 db > > MSE in one end is arround -11, the other end is around -22 > > How can I improve the MSE? Lowering Tx power just worsens it > > > Gino A. Villarini > [EMAIL PROTECTED] > Aeronet Wireless Broadband Corp. > tel 787.273.4143 fax 787.273.4145 > > > > > ---------------------------------------------------------------------- > ---------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------- > ---------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > ------------------------------------------------------------------------ -------- WISPA Wants You! 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