15. Specifications and electrical ratings
Recommended separation distances between portable and mobile RF communications equipment and the Keeler Portable Slit Lamp
The Keeler Portable Slit Lamp is intended for the use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the Keeler Portable Slit Lamp can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and the Keeler Portable Slit Lamp as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum
Separation distance according to frequency of transmitter
output power of
m
transmitter
50 kHz to 80MHz
80MHz to 800MHz
800MHz to 2.5GHz
W
d = 1.2
√
p
d = 1.2
√
p
d = 2.3
√
p
0.01
0.12
0.12
0.23
0.01
0.37
0.37
0.74
1
1.2
1.2
2.3
10
3.7
3.7
7.4
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (m) can be
determined using the equation applicable to the frequency of the transmitter, where p is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.
Note 1
At 80MHz and 800MHz, the separation distance for the higher frequency applies.
Note 2
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects
and people.
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