Specifications and Requirements
E-14 ST80i Stress Test System Instructions for Use
Recommended Separation Distances
The ST80i Stress Test System and optional Thermal Printer are intended for use in the
electromagnetic environment in which radiated RF disturbances are controlled. The customer
or the user of the ST80i Stress Test System and optional Thermal Printer can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile
RF communications equipment (transmitters) and the ST80i Stress Test System and optional
Thermal Printer as recommended below, according to the maximum output power of the
communications equipment.
NOTES 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.
At 800 MHz, the separation distance for the higher frequency range applies.
These guidelines may not apply in all situations. Electromagnetic propagation is affected by the
absorption and reflection from structures, objects, and people.
Table E-9 Recommended Separation Distances
Rated Maximum Output
Power of Transmitter (W)
Separation Distance According to Frequency of
Transmitter (m)
150 KHz to 800 MHz 800 MHz to 2.5 GHz
0.01 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
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