Aim MIL-STD-1553 - Page 406

MIL-STD-1553 Reference Manual
392
Chapter 9 – Bus Monitor Functions
Value
Constant
Description
0
API_SCOPE_COUPLING_SECONDARY
Use signal from secondary channel.
1 – 3
Reserved
4
API_SCOPE_COUPLING_EXTERN
The differential inputs of the primary ADC
channel are coupled to the general purpose
connector on the front plate (e.g. for trigger from
BIU). The expected signal level is 30V.
Note: To prevent damages on the ADC,
the input should be protected, e.g.
with suppressor diodes.
5
API_SCOPE_COUPLING_STUB
The differential inputs of the primary ADC
channel are coupled to the MILBus stub. The
expected signal level is 30V.
6
API_SCOPE_COUPLING_STUB _3V
The differential inputs of the primary ADC
channel are coupled to network emulation of the
MIL-STD 1553 front end.
Note: This coupling is only possible, if the
front end is network coupled
(see ApiCmdCalCplCon)
Additional coupling mode of the primary ADC channel ( MilScope PBI 2.x and newer )
Value
Constant
Description
7
API_SCOPE_COUPLING_EXTERN_3V
The differential inputs of the primary ADC
channel are coupled to the general purpose
connector on the front plate (e.g. for trigger from
BIU). The expected signal level is 3V.
Note: To prevent damages on the ADC,
the input should be protected, e.g.
with suppressor diodes.
Note :
The define API_SCOPE_COUPLING_NETWORK value 6 is obsolete please use
API_SCOPE_COUPLING_STUB_3V instead.
A
A
i
i
U
U
I
I
n
n
t
t
3
3
2
2
p
p
x
x
_
_
S
S
c
c
o
o
p
p
e
e
T
T
r
r
g
g
-
-
>
>
u
u
l
l
_
_
C
C
o
o
u
u
p
p
l
l
i
i
n
n
g
g
S
S
e
e
c
c
Coupling mode of the secondary ADC channel ( MilScope PBI 1.x and PBI 2.x )
See above description of px_ScopeTrg->ul_CouplingPri.
A
A
i
i
U
U
I
I
n
n
t
t
3
3
2
2
p
p
x
x
_
_
S
S
c
c
o
o
p
p
e
e
T
T
r
r
g
g
-
-
>
>
u
u
l
l
_
_
S
S
a
a
m
m
p
p
l
l
i
i
n
n
g
g
R
R
a
a
t
t
e
e
Sampling Rate
The ADC has a fixed sampling rate of 50Msamples per sec. In some cases this resolution is
not necessary, therefore the sampling rate is adjustable. E.g. if the sampling rate is 4, every
4
th
sample from the ADC will be stored, the others will be lost. The sampling rate can be
calculated as follows:
Real Sampling-Rate in MHz = 50 MHz / (ul_SamplingRate+1)
Value
Constant
Description
0
API_SCOPE_RATE_EVERY
Every sample will be stored
1..255
-
Every (n+1)-th sample will be stored
(e.g. 255 = every 256
th
sample will be stored)
A
A
i
i
U
U
I
I
n
n
t
t
3
3
2
2
p
p
x
x
_
_
S
S
c
c
o
o
p
p
e
e
T
T
r
r
g
g
-
-
>
>
u
u
l
l
_
_
C
C
a
a
p
p
t
t
u
u
r
r
e
e
M
M
o
o
d
d
e
e
Capture Mode
This parameter defines the capture mode of the MILScope. The MILScope is actually
started and stopped with the function ApiCmdDataQueueControl(), ApiCmdScopeStart()
on APE cards respectively.
Value
Constant
Description