87
a
）
The ISM (industrial, scientific and medical) bands between 0,15 MHz and 80 MHz are 6,765 M
Hz to 6,795 MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 4 0,70
MHz. The amateur radio bands between 0,15 MHz and 80 MHz are 1,8 MHz to 2,0 MHz, 3,5 MHz to 4,0
MHz, 5,3 MHz to 5,4 MHz, 7 MHz to 7,3 MHz, 10,1 MHz to 10,15 MHz, 14 M Hz to 14,2 MHz, 18,07 MHz
to 18,17 MHz, 21,0 MHz to 21,4 MHz, 24,89 MHz to 24,99 MHz, 2 8,0 MHz to 29,7 MHz and 50,0 MHz to
54,0 MHz.
b
）
The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the
frequency range 80 MHz to 2,7 GHz are intended to decrease the likelihood that mobile/portab le
communications equipment could cause interference if it is inadvertently brought into patient areas. For
this reason, an additional factor of 10/3 has been incorporated into the formulae us ed in calculating the
recommended separation distance for transmitters in these frequency range s.
c
）
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telep
hones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast ca nnot 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 fiel d strength in the
location in which the Model LRK-7000 is used exceeds the applicable RF complia nce level above, the
Model LRK-7000 should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as re-orienting or relocati ng the Model LRK-7000.
d
）
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between
portable and mobile RF communications equipment and the model
LRK-7000
The Model LRK-7000 is intended for use in an electromagnetic environment in which radiated RF d
isturbances are controlled. The customer or the user of the Model LRK-7000 can help prevent elect
romagnetic interference by maintaining a minimum distance between portable and mobile RF co
mmunications equipment (transmitters) and the Model LRK-7000 as recommended below, according to
the maximum output power of the communications equipment.
Separation distance according to frequency of transmitter
m
Summary of Contents for LRK-7000
Page 1: ...LRK 7000 Autorefractor Keratometer Operation Manual LRK 7000 ...
Page 20: ...20 5 Name and function of each part 5 1 Key part 1 6 4 5 7 3 2 Front part ...
Page 36: ...36 Too far Location and Focus are correct ...
Page 45: ...45 Example of a printed page ...
