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APE1553-1/2(-DS) Hardware Manual
19
Figure 3.4-1: MILbus Coupling Modes
MIL-BUS Isolated (default)
No connection to the MILbus
MIL-BUS Transformer
Coupled
SH
LG
/LG
/SH
IN
/IN
MIL-BUS Direct
Coupled
SH
LG
/LG
/SH
IN
/IN
55R
55R
MIL-BUS Transformer
Coupled
with Network
Emulation
IN
/IN
SH
LG
/LG
/SH
23R
23R
23R
23R
2
3R
In network emulation mode, the MILbus emulation circuitry emulates a transformer-
coupled network without the use of MILbus couplers (using a resistor network). Thus,
an external dual-redundant MIL-STD-1553 Terminal can be directly connected to the
module.
The Amplitude of the MILbus Signal can be controlled separately for the PRIMARY and
SECONDARY channel. To control the Amplitude an 8Bit Digital to Analogue Converter
is used.