User's Manual

1.1 Maximum RF Power Density Limits
The RF Radiation Power Density limit figure recommended by RF Central is based upon
guideline levels published in:
a. IEEE standard C95.1 1999 - IEEE Standard for Safety Levels with respect to Human
Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
b. Guidelines for Limiting Exposure to Time-varying Electric, Magnetic & Electromagnetic
Fields (up to 300 GHz) published in 1998 by the Secretariat of the International Commission
on Non-Ionizing Radiation Protection (ICNIRP).
Both documents define guideline RF power density limits for "Controlled" and "Uncontrolled"
environments. An uncontrolled environment is defined as one in which the person subjected
to the RF radiation may be unaware of and has no control over the radiation energy received.
The uncontrolled environment conditions can arise, even in the best regulated operations and
for this reason the limits defined for the uncontrolled environment have been assumed for the
RF Central recommended limit.
Documents a) and b) also show the RF power density guidelines to be frequency dependent.
Different power density / frequency characteristics are presented in the two documents. To
avoid complexity and to avoid areas of uncertainty, RF Central recommends the use of a
single power density limit across the frequency range 100 kHz to 300 GHz. The 1w/m² power
density limit we recommend satisfies the most stringent of the guidelines published to date.
Footnote: The IICNIRP document may be freely downloaded from the internet at
www.icnirp.de/documents/emfgdl.pdf (PDF file)
1.3 Issue Status
Issue Date Changes
1.0 10/24/05 Initial Issue
1.1 12/05/05 Revised to include enlarged encoder parameter sets, encoder
PIDs, operator menus redrawn
RFX-PHT/CMT Issue 1.1 Page 6 of 33