
34
IEC 60601-1-2:
2014
transmitter is shown in the following
table. Interference may occur in the
vicinity of equipment marked with
the following symbol:
Immunity to Conducted
Disturbances Induced by
RF fields
EN/IEC 61000-4-6
3 V
0.15 MHz - 80 MHz
6 V in ISM and
amateur radio bands
between 0.15 MHz and 80
MHz
80% AM at 1 kHz
3 V
0.15 MHz - 80
MHz
6 V, 0.15 MHz
and 80 MHz
80% AM at 1
kHz
The HR-501 is intended for use in an
electromagnetic environment in
which radiated RF disturbances are
controlled. The customer or the user
of the HR-501 can help prevent
electromagnetic interference by
maintaining a minimum distance
between portable and mobile RF
communications equipment
(transmitters) and the HR-501 as
recommended below, according to
the maximum output of the
communications equipment.
Note 1: At 80 MHz and 800 MHz, 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.
The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6,765 MHz to 6,795 MHz;
13,553 MHz to 13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 40,70 MHz.
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 HR-501 is used exceeds the applicable RF
compliance level above, the HR-501 should be observed to verify normal operation. If abnormal performance is
observed additional measures may be necessary, such as reorienting or relocating the HR-501.
RF transmitters the technical description
Parameter
Detail
Operating Frequency range
2 402 MHz ~ 2 480 MHz
Nominal Channel Bandwidth
0.949 MHz
Modulation technique
GFSK
Number of Channels
79 ch
Antenna specification
Dipole Antenna, Peak gain: 5.37 dBi
Power source
Lithium Battery DC 12V, 4.2Ah
RF Output Power
3.65 dBm