Operator's Manual

Product Specifications Wireless Specification
TM80/TM70 Telemetry Monitor Operator’s Manual A - 11
Specifications 608M 1.4G
Data integrity
The time percentage when a TM70 fails to transmit data to the central station
shall not exceed 0.1% over a 24-hour period.
Data latency
Total delay of data transmitted from the TM70 to the central station: ≤ 3 s.
Transmission distance
Distinct vision distance from the TM70 to the AP shall be no less than 50 m for
LOS.
Roaming
The network switchover is automatically implemented when TM70 moves
from the coverage area of AP1 to the coverage area of AP2.
System capacity
Number of TM70s supported by a single
AP: 14 for 5-lead ECG and 12 for 6-lead
ECG.
Every TM70 can communicate with the
central station.
Number of TM70s supported by a
single AP:
■ 16 for 800kHz channel
spacing&5-lead ECG
■ 14 for 800kHz channel
spacing &6-lead ECG
■ 14 for 600kHz channel
spacing &5-lead ECG
■ 12 for 600kHz channel
spacing &6-lead ECG
Each TM70 can communicate with
the central station.
Resistance to wireless
interference
When the distance between interfering devices and TM70 transmitter is farther
than 20cm and the co-channel interference WMTS network (should be no
greater than -85dBm) and an adjacent–channel WMTS network (adjacent–
channel power should be no greater than -40dBm@1.2MHz) also exist, the
TM70 does not encounter network interruption alarm event.
Note: the interfering devices includes:
•
W
ireless equipment operated at 2.4GHz
• C
ellular communication devices
•
M
icrowave ovens
• C
ordless phones
Dynamic networking
stability
When TM70 is moving at the rate of no more than 3.75 m/s within a 15m non-
blocking linear distance, it does not encounter network interruption alarm
event.
Network interruption alarm
When the network interruption occurs, the central station initiates the related
alarms in 8s.
When the network is reconnected, wireless connection recovers automatically.