[AFMUG] Free Space Loss calculator

2015-03-12 Thread Jaime Solorza
Which one
96.6 + 20logD + 20log F  Where F  D are GHz and Miles.

or  20logD + 20log F  + 32.44 -Gt -Gr = FSPL  where t is tx pwr and r is
receiver sensitivity.


Jaime Solorza
Wireless Systems Architect
915-861-1390


Re: [AFMUG] Free Space Loss calculator

2015-03-10 Thread Chuck McCown
Well do you want to use miles and GHz or meters or feet KHz or or or?
This formula may be for meters and cycles per second.  

That is what the constant does, the 32.44 it adjusts for units.

Then the Gt and Gr are the gains of the antennas I presume.  



From: Jaime Solorza 
Sent: Tuesday, March 10, 2015 2:05 PM
To: Animal Farm 
Subject: [AFMUG] Free Space Loss calculator

Which one 
96.6 + 20logD + 20log F  Where F  D are GHz and Miles.

or  20logD + 20log F  + 32.44 -Gt -Gr = FSPL  where t is tx pwr and r is 
receiver sensitivity.


Jaime Solorza 
Wireless Systems Architect
915-861-1390

Re: [AFMUG] Free Space Loss calculator

2015-03-10 Thread Hardy, Tim
Yep, I think this is the formula for meters and MHz:

FSL = 32.5 + 20 log F + 20 Log D

Where:

D = Km
F = MHz

If Gt and Gr were gains, they would be additive – not subtracted, so I’m 
unclear as to what these actually stand for.



From: Af [mailto:af-boun...@afmug.com] On Behalf Of Chuck McCown
Sent: Tuesday, March 10, 2015 4:11 PM
To: Animal Farm
Subject: Re: [AFMUG] Free Space Loss calculator

Well do you want to use miles and GHz or meters or feet KHz or or or?
This formula may be for meters and cycles per second.

That is what the constant does, the 32.44 it adjusts for units.

Then the Gt and Gr are the gains of the antennas I presume.



From: Jaime Solorzamailto:losguyswirel...@gmail.com
Sent: Tuesday, March 10, 2015 2:05 PM
To: Animal Farmmailto:af@afmug.com
Subject: [AFMUG] Free Space Loss calculator

Which one
96.6 + 20logD + 20log F  Where F  D are GHz and Miles.

or  20logD + 20log F  + 32.44 -Gt -Gr = FSPL  where t is tx pwr and r is 
receiver sensitivity.


Jaime Solorza
Wireless Systems Architect
915-861-1390


Re: [AFMUG] Free Space Loss calculator

2015-03-10 Thread Jaime Solorza
i want to sleep.i was asked about my calculations and they sent me that
formula.   I had seen it before but I use the one you do for quick stuff
and use RM or other calculators with more bells and whistles to do actual.



Jaime Solorza
Wireless Systems Architect
915-861-1390

On Tue, Mar 10, 2015 at 2:11 PM, Chuck McCown ch...@wbmfg.com wrote:

   Well do you want to use miles and GHz or meters or feet KHz or or or?
 This formula may be for meters and cycles per second.

 That is what the constant does, the 32.44 it adjusts for units.

 Then the Gt and Gr are the gains of the antennas I presume.



  *From:* Jaime Solorza losguyswirel...@gmail.com
 *Sent:* Tuesday, March 10, 2015 2:05 PM
 *To:* Animal Farm af@afmug.com
 *Subject:* [AFMUG] Free Space Loss calculator

  Which one
 96.6 + 20logD + 20log F  Where F  D are GHz and Miles.

 or  20logD + 20log F  + 32.44 -Gt -Gr = FSPL  where t is tx pwr and r is
 receiver sensitivity.


  Jaime Solorza
 Wireless Systems Architect
 915-861-1390