Mindray VS 8 - Page 104

VS 8/VS 8A Vital Signs Monitor Operator’s Manual A - 7
A.5.8.3 Wi-Fi Network Stability
There is no communication data loss when the monitor moves at a speed not higher
than 3.75 m/s in a 15 meter obstacle-free linear range.
16 monitors are connected to the same AP and each roams for 30 times, of which at least
3 monitors roam simultaneously. The ratio of the communication data loss on the CMS
from any monitor does not exceed 0.1% over a 24-hour period.
A.5.8.4 Line of Sight Distance
The line of sight distance between the monitor and the AP is no less than 50 meters.
A.5.9 Bluetooth Specification
A.5.10 Bluetooth Performance Specifications
WARNING
• Keep the monitor away from interference sources.
• Do not use Bluetooth nodes to perform realtime vital signs monitoring.
5GHz WiFi
(5270-
5290MHz)
Adjacent 2.0m 4m
Co-channel 7.0m 8.5m
5GHz WiFi
(5590-
5610MHz)
Adjacent 2.0m 4m
Co-channel 7.0m 8.5m
5GHz WiFi
(5755-
5775MHz)
Adjacent 2.0m 4m
Co-channel 7.0m 8.5m
Frequency
band
Unintended signals Separation distance
between the
monitor and the
interference devices
Separation distance
between the AP and
the interference
devices
Protocol Bluetooth 5
Modulation mode GFSK
Operating frequency 2402 to 2480MHz
Wireless data rate 2Mbps, 1Mbps, 125kbps
Output power
≤ 8 dBm ± 4 dB
Data security AES128
A - 8 VS 8/VS 8A Vital Signs Monitor Operator’s Manual
NOTE
• When equipment using Bluetooth function, possible sources of interference
include:
◆ IEEE 802.11b/g/n: 2.4GHz
◆ LTE: Band 40: 2.3GHz, Band 41: 2.5GHz (Adjacent band)
• To make sure equipment works well, user should make sure the separation
distance between equipment or Bluetooth Node and the Unintended
interference devices be longer than the distance showing below:
A.5.10.1 System Capacity
In a range of 10 m
2
, there should be no more than 3 groups of paired monitors and bluetooth
nodes working simultaneously.
A.5.10.2 Resistance to Interference
The distance between the interfering devices and the monitor is greater than 20 cm. The
interfering devices include 2.4 GHz Wi-Fi devices, bluetooth communication devices,
remote controls, microwave ovens, intercoms, cellular mobile networks, and cordless
phones.
The monitoring network must support the following requirements:
■ The total delay of data transmission from the monitor to the bluetooth node: ≤ 6
seconds.
Frequenc
y band
Unintended
signals
Put the monitors close to
the interference devices
Put the Bluetooth Nodes
close to the interference
devices
Separation
distance A
Operation
distance B
Separation
distance A
Operation
distance B
Bluetooth
mode
(2402-
2480MHz)
Wi-Fi (802.11n)
channel 1 and 11,
lower adjacent
band LTE,
upper adjacent
band LTE
0.2m 10m0.2m10m
Wi-Fi (802.11n)
channel 6
0.2m 10m0.2m10m
Wi-Fi (802.11n)
channel 6,
lower adjacent
band LTE,
upper adjacent
band LTE
0.2m 10m0.2m10m