F15 Series Fetal & Maternal Monitor User Manual WI-FI Networking and Instructions
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Ping 32-byte data from 192.168.1.166:
Response from 192.168.1.166: byte=32, time=62ms, TTL=128
Response from 192.168.1.166: byte=32, time=29ms, TTL=128
Response from 192.168.1.166: byte=32, time=46ms, TTL=128
Response from 192.168.1.166: byte=32, time=39ms, TTL=128
Response from 192.168.1.166: byte=32, time=57ms, TTL=128
Response from 192.168.1.166: byte=32, time=14ms, TTL=128
Response from 192.168.1.166: byte=32, time=31ms, TTL=128
Response from 192.168.1.166: byte=32, time=28ms, TTL=128
Response from 192.168.1.166: byte=32, time=20ms, TTL=128
Response from 192.168.1.166: byte=32, time=39ms, TTL=128
Ping statistical information of 192.168.1.166:
Data package: sent=10, received=10, lost=0 (0% lost),
Estimated time (in milliseconds) for round trip:
Shortest=14 ms, longest=62 ms, average=36 ms
Network delay = 62ms; meets the requirements;
Network jitter = max (62-14, 62-36) = max (48, 26) = 48ms; meet the requirements;
Note that, in this environment, the AP's channel selection method is:
1. Channel 1, 6, 11 can not be selected unless you can communicate with the hospital to clear out a
clean channel, otherwise the co-channel interference is too large to meet the requirements;
2. Compared with other channels, the signal strength of channel 6 and 11 is too high to meet the
requirements, and only channel 2, 3, 4, and 5 can be selected. Channel 3 is the best choice at
present;
3. When the customer service engineer scans the channel, not only the nearby AP signal intensity
distribution around the monitor should be scanned, but also the AP signal strength near the
location of all transducers should be tested. These places also have strong interference to
wireless transmission;
4. For the interference of the wireless channel, it would be better to communicate with the customer
clearly the reason for the disconnection is that the wireless resources are occupied, and the
hospital needs to clear the AP, and otherwise there is a disconnection situation. Our software has
the function of continuous transmission from disconnection to guarantee the data integrity, but
short-lived data loss can occur, causing fetal heart sound interruptions and dropout alarms.
A9.5.2 Wireless Model Network Design
All wireless transducers are connected to the internal AP. The SSID, password and channel number
can be set in the AP to ensure the accuracy of the network. The frequency resource of Wi-Fi
determines that there are only 13 channel resources, and the channel bandwidth of the b mode is only
10 Mbps. The channel settings when multiple sets of machines are used at the same time must be
paid attention to in order to avoid conflicts and interferences affecting the overall use.
When using multiple sets of monitors at the same time, you need to pay attention to channel
distribution and bandwidth distribution:
For bandwidth distribution, according to the requirements of this paper, 16 similar monitors can be
accommodated at most within a single channel in consideration of 50% of derating and ensure half
of the bandwidth is idle.
For channel distribution, it is necessary to set more than 2 channels apart from channels whose
Traditional 510(k) of Fetal & Maternal Monitor
014_14.1_F15_Series_User_Manual
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