Stewart's Corral
 		page 19
visitor #
Frequency
Usage Legend
       Mobile phones and towers (PCS, GSM)
  Mobile phones (UMTS)
  Portable phones (DECT,CT1,CT1+,CT2)
  Business mobile communications (VHF)
  Broadcast and TV broadcast (also digital)
  WLan, WiFi, WiMAX
  Point-to-point
  Radar
  GPS satellites
  radio location beacons, VHF collars

Exposure limits and
conversion tables
 dBm Graph Color Legend


Note: The waterfall graphs below cover a frequency range from 0 to 6500Mhz, but the antenna used is only for 700 to 6000Mhz
Please ignore the apparant signal strength below 700Mhz, but it is still interesting to see the relative changes for location and nearby equipment.

For the graphs below:
The far left column shows time index, location, and what known EMF sources were nearby, or when the Spectran antenna was itself shielded, (orange on grey).
The first row has pulse mode off. Notice the blacker field, or less signals detected. The results shown in this configuration (or mode) are the most accurate for measuring actual power density and detected signals.
Blue background denotes away from home. Going thru town or past towers.
Pink background is from when I was getting elevated readings on my Zap Checker, but could not find the corresponding signal on the Spectran.

2006.March
From 0 Mhz to 3000 Mhz, 3Mhz bandwidth, PulseMode on for 29 of 33 recordings


Equipment upgrade due to problem with DC power plug. Still Rev.2
You may notice the signal strength below 700MHz is different. Again, it is to be disregarded as above for the same reason, the hyperlog antenna is only calibrated above 700 Mhz.

2006.May

2006.July
The spikes when driving by new towers is clearly seen here.

2009.May - Jun

2010.Apr

Flashed a new firmware version, and the noise floor changed, or more.


From 3500 Mhz to 6000 Mhz, 3Mhz bandwidth, PulseMode on
2006.March

2006.May

2006.July

2009.May

2010.Apr


(please note, PulseMode turns off Phantom filtering. Thus aliases, or echos at 20Mhz from actual signal may show up.)
However, due to the nature of pulsed digital signals, PulseMode is required to see them.

PERL script to convert ldt files to xpm

Aaronia home page - Maker of Spectran
Aaronia home page in English
Preliminary conclusions:
The background radiation is growing/increasing year by year. We can feel it, even here. Here are attempts to graph and document the current situation, with numbers.


TV stations are 90 miles away. Calibration of meter below 700Mhz is not guaranteed. Therefore strength of low frequency signals is not certain with this equipment.

Medium signals from within 9 miles:
1700-1850Mhz PCS and GSM celphones
5800-5900Mhz Wireless internet or Wlan

Medium signals that blanket entire area from great distances:
various Radar
4300Mhz Aircraft radar altimeter

Colville
Very noisy and painful to be around now.
Various wireless phones, wlan, point 2 point.

traveled to Marysville
870Mhz, 1900Mhz, 2800Mhz, 3600Mhz Towers and masts can be seen, much louder than background.
Since the above was written, I have become aware of unfavorable reports from testing of the Aaronia Spectran. Also after writing to Aaronia myself about trying to decipher the signals detected, I have concluded the above measurements are not accurate enough to rely on, without being an expert myself in using the equipment properly, and they insist I read the manual, as if I have not several times!
However, I do think the above graphs are useful as an indicator of overall noise level in the air, and as a comparison between multiple locations.
Since Aaronia has a 10 year replacement warranty, I hope they release a more accurate version within that time.
I have the Revision 2 model. I am not getting the Revision 3 model, as there are reports that it is not better.

From Burgerwelle:
New trial: Aaronia Spectran Rev.3
High-frequency measuring instruments, Myth and reality

The fact I am getting the same "background" levels across all locations, including deep in the Cascade mountain range far from known towers, leads me to disregard the consistant lines as non-existant. Unfortunately, only looking at the changes from place to place, is not a good way to determine actual power density levels.

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"We should be thankful to those with allergies, because they warn the rest of us of things that may be harmful" - Dr. Björn Gillberg, a famous Swedish environmental scientist.

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Stewart Andreason - electro-refugee with shielded computer.

spectrumGraphs.html Updated 2010.Jun.16