Operator's Manual
DS7A - Constant Current Stimulator
Recommended separation distances between portable & mobile RF
communications equipment & the Digitimer DS7A (Table 6)
The Digitimer DS7A is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Digitimer DS7A can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the Digitimer DS7A 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)
150 kHz to 80 MHz
d = [3,5/3]
Å
P
80 MHz to 800 MHz
d = [3,5/3]
Å
P
800 MHz to 2.5 GHz
d = [7/3]
Å
P
0.01
0.12
0.12
0.23
0.1
0.37
0.37
0.74
1
1.12
1.12
2.33
10
2.88
2.88
5.76
100
11.67
11.67
23.33
For transmitters rated at a maximum output power not listed above, the recommended separation
distance
d
in metres (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
absorption and reflection from structures, objects and people.
Digitimer Ltd.
55 of 58
Copyright © 2014
File Ref: N:\Docs\Company\Manuals\DS7A\Issue-14\DS7A-iss14.odt
Last Revised: February 1, 2017
