Electromagnetic Compatibility (EMC) Specifications
PageWriter TC 70 Cardiograph Service Manual A-13
a. Field strengths 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 the location in which the PageWriter TC70
is used exceeds the applicable RF compliance level above, the PageWriter TC70 should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-
orienting or relocating the PageWriter TC70.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Table A-3 Recommended Separation Distances Between Portable and Mobile RF Communications
Equipment and the PageWriter TC70 Cardiograph: for equipment and systems that are
not life-supporting
The PageWriter TC70 cardiograph is intended for use in the electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the PageWriter TC70 cardiograph can
help to prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the PageWriter TC70 cardiograph as
recommended below, according to the maximum output power of the communications equipment.
Rated Maximum Output
Power of Transmitter (W) Separation Distance According to Frequency of Transmitter (m)
0.01
150 KHz to 800 KHz 800 MHz to 2.5 GHz
d = 1.2 d = 2.3
0.1 m 0.2 m
0.1 0.4 m 0.7 m
1 1.2 m 2.3 m
10 4.0 m 7.0 m
100 12.0 m 23.0 m
For transmitters rated at a maximum output power not listed above, the recommended separation distance d
in meters (m) can be estimated 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 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by the
absorption and reflection from structures, objects, and people.
P P
To Next Page
Loading...