Passive repeater signal calculator

This forum is for discussions regarding System Infrastructure and Related Equipment. This includes but is not limited to repeaters, base stations, consoles, voters, Voice over IP, system design and implementation, and other related topics.

Moderator: Queue Moderator

Post Reply
Nand
Posts: 1691
Joined: Wed Oct 31, 2001 4:00 pm

Passive repeater signal calculator

Post by Nand »

Image

The above is a view of an Excel spreadsheet passive repeater calculator.
The calculator can be downloaded by right clicking on the link and selecting “Save Target As…”
http://www.storm.ca/~nand/990/PassiveRepeater.xls
or
http://wijnandromijn.com/990/PassiveRepeater.xls
Just clicking on the link will run the spreadsheet if you have Excel installed, with the option of saving before the window closes.

Keep in mind that the path loss in the calculator is for free-space-line-of-sight. This can only be approached on earth by having a clear and wide path between antennas.

Corrected and updated the spreadsheet. The km to mile conversion was backwards. Added a signal level calculation for the pickup antenna. This point can be measured and should give an indication how well it may work before running the coax cable. Also added a cable loss table for different cables and frequencies on sheet 2.

Nand.
Last edited by Nand on Thu Mar 29, 2007 10:33 am, edited 1 time in total.
CTAMontrose
was grem467
Posts: 1145
Joined: Mon Jul 21, 2003 12:46 pm

Post by CTAMontrose »

excellent work!

thanks man!
User avatar
jim
Posts: 2184
Joined: Sun Sep 09, 2001 4:00 pm

Post by jim »

Nice job

All I know is don't ever ask me to pronounce your name and get it right the first time!
User avatar
nmfire10
Batboard $upporter
Posts: 4109
Joined: Sat Jun 29, 2002 4:41 pm

Post by nmfire10 »

Ditto on the well done calculator. Very nice.

Don't worry jim. I've been trying to pronounce it since thursday and I still haven't gotten it.
"I'll eat you like a plate of bacon and eggs in the morning. "
- Some loser on rr.com

eBay at it's finest:
Me: "What exactly is a 900Mhz UHF CB?"
Them: "A very nice CB at 900Mhz speed!"

:-?
User avatar
kcbooboo
Batboard $upporter
Posts: 2117
Joined: Wed May 01, 2002 9:03 am

Post by kcbooboo »

I believe the "ij" combination has gotten morphed into the letter "Y" but it can be pronounced hard as in "wire" or softer, as in "if". It depends on how you want it to be heard.

It's much easier just to say "Nand" and leave the rest alone.

Now all we need is a "Nor" and our logic would be complete !

I'll try to confuse people even more by mentioning that famous New York Van Wyck expressway. Some people say it as "wick" and others say it as "why(ck)", and even New Yorkers can't agree on it.

Bob M.
Post Reply

Return to “Base Stations, Repeaters, General Infrastructure”