Nellcor Oximax NPB-40, Service Manual

Page: 81 / 114

Specifications
NPB-40 73
80 MHz to 800
MHz
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey
a
, should
be less than the compliance level in
each frequency range.
b
800 MHz to
2.5 GHz
Interference may occur in the vicinity of equipment marked
with this symbol.
Note 1 : At 80 MHz, the higher frequency range applies.
Note 2 : These guidelines may not apply in all situations.
Electromagnetic propagation is affected by absorption and reflection from
structures, objects, and people.
a
Field strength from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile radios, amateur radio, AM
and FM radio broadcast and TV broadcast cannot be predicted theoretically
with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the
measured field strength in which the NPB-40 is used exceeds the applicable
RF compliance level above, the NPB-40 should be observed to verify
normal operation. If abnormal performance is observed, additional measures
may be necessary, such as reorienting or relocating the NPB-40.
b
Over the frequency range 150 kHz to 80 MHz, field strength should be less
than [V
1
} V/m.
Table 7: Electromagnetic Immunity (Continued)
The NPB-40 is intended for use in the electromagnetic environment
specified below. The customer or user of the NPB-40 should assure that
it is used in such an environment.
d
3.5
E
1
-------
P
=
d
7
V
1
------- P
=