User's Manual

TWACS
®
-ORION
®
for UMT Products User Guide 11
Chapter 2 • Functional Description
Figure 2.2 RF operation block diagram
HHTR Data
RF = PIC
18
LF
242
902 -928
MHz
UI = PIC
18
LF
6720
8
MHz
7.
2
V NiMH
1600
mAH
Regulated to
5
V and
3.3V
EMTR-3 Data
Orion Dat
a
916 .45
MHz
Data Rate =
100
kbps
2-
level FS
K
+/
-
50
Khz
(3
o
f
6)
Orion Transmitter
Orion Transmitter
HHTR
Handheld
Transceiver
PC
Data Transfer
from
/
to
HHTR
FOCUS or kV2c™
With EMTR-3
RF Interface
Orion Transmitter
Orion Transmitter
RF Operation Block Diagram
(
TWACS
-
Orion Project
)
June
22, 2007
Wire Interface to
Water/Gas Meter
Encoder
1-
way RF Link
902- 928
MHz
Bi
-
Directional
RF Lin
k
RS
-
232
Multi-port EMA provides 1 Electrical port
and 7 RF
p
orts for
g
as/water.
EMA unregulated voltage is 6V to 13V.
EMA regulated voltage is 5V.
Re
g
ulated fro
m
EMA to EMTR-3 is 3.3V.
PIC18F 4525
8MHz
F
CC
ID
:
P
N3
Y
7
2
553
-1
Orion Transmitter
Orion Transmitter
Orion Transmitter