APG IRU-3000 user manual - Manual (Page 17)

Rev. A2, 11/08 IRU-2xx4/3xx4
17
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OUT OF RANGE SPAN
Out of Range Span The Out of Range Span was designed to eliminate extrane-
ous signals and noise. This Span or window changes with the distance of the
average distance reading. This window will allow only readings that fall within
its limits. If the target is suddenly changed outside of the window limits, the
sensor will wait until a number or echoes specified in the Out of Range Count
are received within a new window before updating the output reading.
To Read the Out of Range Span in a sensor, use the command structure:
Send Receive
AAh Start Byte 66h Start Byte
01h, Sensor Number 01h Sensor Number
11h Command 11h Command
00h Data (not used) ##h Span (High Byte)
00h Data (not used) ##h Span (Low Byte)
55h End Byte ##h NA
99h Stop Byte
To change the Out of Range Span in the sensor to 304 mm, use the command
structure;
Send
AAh
Start Byte
01h, Sensor Number
12h Command
01h Data 304 decimal = 130h
30h Data
55h End Byte