222 MI-42-0001 Rev. 19
TECHNICAL DESCRIPTION: RF Communications Equipment
9.13 RF Communications Equipment
9.13.1 Overview:
Electromagnetic
Environment
Portable and mobile RF communications equipment can affect the systems.
AIRO
is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled.
Users can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and AIRO as recommended
below, according to the maximum output power of the communications equipment.
RF Transmission
and Receipt
When AIRO is generating X-rays, the system transmits data from the Rotor computer to the Gimbal
computer via Wi-Fi. Since the AIRO incorporates RF transmission and receipt of data, the following
provides required RF/Wi-Fi specifications:
Interference NOTE: Try to avoid using AIRO with HF Surgical Equip
ment. Although Mobius Imaging believes
that the AIRO should not make any unintended movements due to electromagnetic interference in
the presence of high frequency surgical devices, cardiac defibrillators, and their monitors, these
combinations have not been tested. Interference in movement when using high frequency surgical
devices simultaneously with the wireless remote control is possible but uncommon, since no
remotely controlled movements are necessary at that time.
Separation
Di
stances
Recommended separation distances between portable and mobile RF communications equipment
and AIRO:
Category Specification
Frequency 2400 - 2483.5 MHz
Bandwidth 20/40 MHz
Type of Modulation DSSS/OFDM/FHSS
Effective Radiated Power (ER) 20 dBm max
Output Power of
Transmitter (W)
Separation Distance According to Frequency of Transmitter (m)
150 kHz to 80 MHz 80 MHz to 800 MHz
800 MHz to 2.5 GHz
0.01 0.12 0.12 0.23
0.1 0.380.380.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100121223
For transmitters rated at a maximum output power not listed above, the recommended separation distance
d in meters (m) can be determined 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: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
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