GE MDS SD Series Technical Manual page 101

operation means that the payload application data will be interrupted while program-
Intrusive
ming data is sent over the air. This is the fastest method of programming radios over the air, but
it comes at the cost of interruptions in the primary use of the radio network. See Table 17 for the
approximate times needed for intrusive reprogramming.
NOTE
mode should be used only when the radio channel can be devoted to the repro-
Intrusive
gramming operation, as payload data will be interrupted.
Passive (Non-intrusive)
streams, thus allowing payload data to continue uninterrupted. This mode requires payload data
to be sent so that the reprogramming data can be carried.
NOTE Radio networks configured for
still sending payload data. Data is sent at the first chance, and does not wait for user data
to be sent.
The disadvantage to passive operation is that it takes longer to convey the reprogramming infor-
mation since it is must be attached to existing data transactions. See Table 18 for the approxi-
mate times needed for passive reprogramming.
MDS 05-4864A01, Rev. I
Table 17. Approximate Reprogramming Times —
Intrusive Mode
Modem Speed (bps) Approximate Time Required
4800 1 hour, 30 minutes
9600 35-40 minutes
19200 20-25 minutes
Radio assumptions: Signal strength -85 dBm or stronger, Packet
Size: 40, Block Size: 512, Retry: 3, Download Delay: Extended-1
Polling assumptions: Serial polling with 1-second poll time, sending
random data at 50-100 bytes. Slower polling times will significantly
increase completion time. Polling should be temporarily
suspended while OTA reprogramming is active.
operation "piggy-backs" reprogramming data onto normal payload data
Packet w/MAC
Table 18. Approximate Reprogramming
Times — Passive Mode
Modem Speed Approximate Time Required
(bps)
4800 6 hours, 7 minutes
9600 1 hour, 30 minutes
19200 1 hour, 30 minutes
Radio assumptions: Signal strength -85 dBm or stronger,
Packet Size: 40, Block Size: 512, Retry: 3, Download Delay:
Extended-1
Polling assumptions: Serial polling with 1-second poll time,
sending random data at 50-100 bytes. Slower polling times will
significantly increase completion time.
SD Series Technical Manual
operation support intrusive operation while
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