User's Manual

EP308 Specifications Manual
06E00079-001A
10
EP308 Specifications Manual | Trapeze March 25, 20166
Figure 8-1
Note: C1 and C2 are 0.0022 F.
Caution: An RS-485 specified termination uses a 100 ohm resistors external to each node at
each end of the bus which if installed in a J1708 system can cause the network to fail/
8.2 Digital Inputs
V
IL
< 0.5V and V
IH
1.2V.
These inputs are protected with 47K of series resistance. Transients to 60V can be tolerated
with circuit damage becoming more likely above 60V.
8.3 Audio
The speaker is rated to 3W, 200 – 20,000 Hz.
8.4 GPS
The On-Board Validator uses an internal GPS antenna. Specifications taken from Telit Jupiter
JF2 Datasheet [3].
Channels
48
Sensitivity
To -163 dBm