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Very low frequency (VLF) emissions (30,000Hz to 66,000Hz)
Since the LCD used in your Toshiba Pocket PC e830 for
the presentation of visual information is a flat-panel,
reflective device which requires no sweep-frequency,
your Toshiba Pocket PC e830 emits no EMF emissions in
the VLF range.
A cathode ray tube, on the other hand, is an emissive device that does
require the presence of a sweep-frequency in the 15,000 to 20,000 Hz
(VLF) range in order to perform its function.
Consequently, only desk-top computers which use cathode ray tube mon-
itors for the presentation of visual information are emitters of EMF emis-
sions in the VLF range.
Radio frequency (RF) emissions
All personal Pocket PCs generate digital timing pulses at
frequencies within the RF range, and consequently may
emit minute levels of stray EMF emissions in the RF
range.
As a result, all Pocket PCs have been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the US Federal
Communications Commission (FCC) Rules and also to comply with Cana-
dian ICES-003 regulations as being "Class B" digital devices. ("Class B"
digital devices are authorized for use in residential environments and are
not permitted to intentionally emit RF energy. Nevertheless, they are per-
mitted to unintentionally emit low levels of RF energy, as a result of the
generation of digital timing pulses by their clock oscillator circuits.)
The allowable levels of RF energy that may be emitted by Toshiba Pocket
PCs are severely limited in their intensity by existing FCC Regulations (47
CFR Section 15.109(a)) and ICES-003 to prevent interference with recep-
tion on nearby radio and TV receivers.
Toshiba Pocket PCs have therefore been equipped with internal shielding
to significantly reduce the stray emission of RF energy.
Nevertheless, airlines may prohibit the use of Toshiba Pocket PCs (as
well as other portable electronic devices that could emit stray RF energy)
during take-offs and landings, because of possible interference with the
reception of signals by airborne electronic navigation devices.
For instance, because FCC and ICES regulations for "Class B" digital
devices severely limit the levels of RF energy that may be emitted by a
Toshiba Pocket PC, the resulting emissions also fall well within the allow-
able limits that have been adopted by OSHA in 29 CFR § 1910.97, and
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