<s>
Encoder	B-Protocol
receiver	I-Protocol
transmitter	I-Protocol
(	O
ERT	O
)	O
is	O
a	O
packet	B-Application
radio	I-Application
protocol	O
developed	O
by	O
Itron	O
for	O
automatic	O
meter	O
reading	O
.	O
</s>
<s>
ERT	O
is	O
an	O
OOK	B-Device
modulated	O
radio	O
signal	O
which	O
is	O
transmitted	O
in	O
the	O
unlicensed	O
900-920	O
MHz	O
band	O
.	O
</s>
<s>
The	O
message	O
is	O
transmitted	O
in	O
the	O
clear	O
and	O
uses	O
Manchester	B-Protocol
encoding	I-Protocol
.	O
</s>
<s>
The	O
protocol	O
uses	O
frequency-hopping	B-Protocol
,	O
a	O
multiple	O
access	O
method	O
to	O
avoid	O
interference	O
with	O
other	O
nearby	O
meters	O
.	O
</s>
<s>
Notably	O
,	O
Digi	B-Application
sells	O
an	O
ERT	O
gateway	O
,	O
and	O
Grid	O
Insight	O
sells	O
a	O
PC-based	O
product	O
called	O
the	O
.	O
</s>
<s>
It	O
should	O
be	O
possible	O
to	O
decode	O
ERT	O
signals	O
using	O
general	O
purpose	O
UHF	O
packet	B-Application
radios	I-Application
such	O
as	O
the	O
or	O
.	O
</s>
<s>
A	O
software-defined	B-Architecture
radio	I-Architecture
receiver	O
has	O
been	O
implemented	O
using	O
inexpensive	O
hardware	O
:	O
,	O
and	O
the	O
software	O
will	O
decode	O
SCM	O
messages	O
.	O
</s>
<s>
Kismet	B-Protocol
(	O
software	O
)	O
has	O
an	O
.	O
</s>
