User's Manual

an energy scan. The pump will perform the energy scan if after 10 minutes no
CGM transmitter signal has been received. If the channel change occurs the pump
will send beacons on the new channel.
The CGM transmitter will initiate a channel search when beacon detection fails on
the associated channel. The search will be conducted across all five channels.
When the beacon is located the transmitter will rejoin on the identified channel.
Upon re-association any missed packets (up to 10 hours) will be transmitted from
the CGM transmitter to the pump.
In normal operation the CGM transmitter will transmit a packet every 5 minutes
and retransmit the packet if the data is corrupted or missed.
Radio frequency (RF) communications specifications
Utilizes the IEEE 802.15.4 protocol with the proprietary data format.
Pump frequency 2.4 GHz; proprietary Medtronic protocol; range up to
1.8 meters (6 feet).
Maximum output
power (EIRP)
-1.59 dBm
Operating frequencies 2420 MHz, 2435 MHz, 2450 MHz, 2465 MHz, 2480 MHz
Bandwidth 5 MHz which is allocated channel bandwidth per the IEEE
protocol
Data security
The MiniMed 640G insulin pump is designed to only accept radio frequency (RF)
communications from recognized and linked devices (you must program your
pump to accept information from a specific device).
The MiniMed 640G system ensures data security via proprietary means and ensures
data integrity using error checking processes, such as cyclic redundancy checks.
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product specifications and safety information
Product specifications and safety information 269
MP6025958-022 / A
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