The cell phone radiation SAR test has 23 different ways to screw up the result of the FCC-required compliance test.
Take a look at all the things that the FCC admits can go wrong during a SAR test!! (What’s SAR?)
The text below (in italics labeled “Measurement Uncertainties”) is copied right out of the FCC’s own SAR compliance testing document, “Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields: Supplement C (Edition 01-01) to OET Bulletin 65 (Edition 97-01).”
This FCC document identifies 23 different ways the cell phone radiation (SAR) test results can be corrupted by a testing facility. How disturbing to find out that this vital consumer safety testing procedure is likely to result in “measurement uncertainty!”
Manufacturers (e.g.; RIM, maker of all BlackBerrys) are also allowed by the FCC to use the faulty procedure to test cell phone radiation in their own labs and report the results using an “honor system.” Talk about allowing the fox to guard the hen house! Also requiring a ridiculously complex compliance test that provides 0% confidence that the results are representative of the actual radiation effect on consumers…..what kind of regulatory oversight is that?!
The FCC is required by federal law to regulate a cell phone’s microwave radiation impact on a consumer’s body during a call.
The upper limit of absorption for heating parts of the brain and organs of a simulated human body during the test is 1.6 SAR. The CTIA (powerful cell phone industry lobby) and FCC claim that as long as a cell phone’s SAR test result is under this 1.6 limit, it is deemed “safe”. Well, given all the errors and uncertainties inherent in the SAR test, how can a consumer be guaranteed their cell phone’s max SAR test result IS actually below 1.6?
The actual text from the FCC’s testing document followed by all cell phone manufacturers seeking compliance appears below. See for yourself:
Measurement uncertainties are calculated using the tolerances of the instrumentation used in the measurement, the measurement setup variability, and the technique used to perform the SAR evaluation.
The overall uncertainty is calculated in part by identifying uncertainties in the instrumentation chain used in performing each of the procedures in the evaluation. Methods for evaluating and expressing measurement uncertainties can be found in the NIST Technical Note 1297 (TN1297)24, entitled ”Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results”. Another source of reference is the NIS 81 document, entitled “The Treatment of Uncertainty in EMC published by the National Physical Laboratory of the United Kingdom.
(NOTE: later in the document)…..
DOCUMENTING THE MEASUREMENT UNCERTAINTY OF SAR EVALUATIONS
A. Assessment Error (measurement system)
I. Probe Calibration Error
1. Axial Isotropy Error
2. Hemispherical Isotropy Error
3. Spatial Resolution Tolerance
4. Boundary-effects Error
5. Linearity Error
6. Sensitivity Error
7. Response Time Error
8. Integration Time Error
II. Readout Electronics Error
III. Errors from RF Ambient Conditions
IV. Probe Positioner Calibration Error (absolute)
V. Probe Positioning Error with respect to the Phantom Shell
VI. Errors from the Extrapolation, Interpolation and Integration Algorithms
B. RF Source Error (test device)
I. Test Sample Output Power Drift Error
II. SAR Variation due to Performance Tolerance of the Test Sample
III. SAR Variation due to Tolerance of Production Units
C. Test Device Positioning Error
I. Test Sample Positioning Error
II. Device Holder or Positioner Tolerance
D. Phantom and Setup Errors (See Reference)
I. Phantom Production Tolerance (shape and thickness)
II. Target Liquid Conductivity Tolerance
III. Measured Liquid Conductivity Error
IV. Target Liquid Permittivity Tolerance
V. Measured Liquid Permittivity Error