Company Confidential
19
Raveon Technologies Corp.
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Figure 2 (Address Filtering)
One effect of this is that an address mask of 0000 will cause the
Radio Modem
to
received any data from any unit that transmits. The Destination Address will
effectively be ignored if the mask is set to 0000.
9.10.6 Addressing Examples:
Example 1 (default configuration)
Sending Destination Address = 1234
Receiving Unit Address = 1234
Receiving Unit’s Address Mask = FFFF
Result: Unit will receive the data, because the addresses identically match. When the
addresses are identical, the value of the mask is not important.
Notes: This is the default configuration. All units have address 1234, and all modems will
talk to all other modems with address 1234.
Example 2 (a configuration that won’t work)
Sending to Destination Address =
1236
Receiving Unit Address =
1234
Receiving Unit’s Address Mask =
FFFF
Result: No data will be received, because the address do not match, and the address
mask of FFFF requires that all digits in the address match. .
Example 3 (able to receive a data from a group, 1230 – 123F)
Sending to Destination Address =
1236
Receiving modem Unit Address =
1234
Receiving modem Address Mask =
FFF0
Radio Modem receives
data over-the-air to
Destination Address
xxxx
Radio Modem has
Unit Address yyyy
Radio Modem has
Address Mask
zzzz
“
AND
” them
together
Compare the two results
from these two ANDs
“AND”
them
together
Output the data via
serial port if the two
results were identical
