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The number of devices that can be connected to the AM OUT and TTL Out ports
depends on the cabling type and length, as well as the input impedance of the
devices. The following simplified circuit schematic shows the interface between an
IRIG-B source and connected devices.
1
2
3
Figure 1.3
Determine the maximum number of devices (N) that can be connected to the source
by checking if the source current (IS) required to drive the connected devices is
less than the maximum drive current the source can provide, and verifying that the
load voltage (VL) the connected devices see is greater than the minimum required
voltage.
RUGGEDCOM RMC8388
Installation Manual, 11/2022, C79000-G8976-1188-05
R
S
V
S
1
Source
Cabling
Device
IRIG-B Simplified Circuit Schematic
R
C
R
/N
L
2
3
Introduction
1.6.3 AM and TTL Outputs
7
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