24
APE1553-1/2(-DS) Hardware Manual
4.2.2 Input Filter and Noise
Low pass filters are implemented for high frequency suppression and impedance matching
between the amplifier stage and the A/DC input.
On sampling rates higher than 20ns (40ns…) the average value of the last two samples is
saved, which results in a better SNR.
4.3
External MILScope A/DC Channels
Beside the MILbus A/DC channels, two extra A/DC channels are provides on the
High-
Density DSUB-26 connector at the frontplate. These two channels can be used for measuring
of any external analogue signals.
Table 4.3-1: Pinout External MILScope inputs
Pin No:
Signal:
Pin No:
Signal:
Pin No:
Signal:
1
RS232 RXD
10
RS232 TXD
19
Trigger Output BM, ch 1
2
Trigger Output BC, ch 1
11
Trigger Output RT, ch 1
20
Trigger Input BM, ch 1
3
Trigger Input BC, ch 1
12
Trigger Input RT, ch 1
21
Trigger Output BM, ch 2
(1)
4
Trigger Output BC, ch 2
(1)
13
Trigger Output RT, ch 2
(1)
22
Trigger Input BM, ch 2
(1)
5
Trigger Input BC, ch 2
(1)
14
Trigger Input RT, ch 2
(1)
23
IRIG Output
6
IRIG Input
15
GPIO2
(2)
24
GPIO5
(2)
7
GPIO1
(2)
16
GPIO3
(2)
25
MILScope_extern_chB
8
MILScope_extern_chA
17
GND
26
#MILScope_extern_chB
9
#MILScope_extern_chA
18
GPIO4
(2)
Note
(1)
:
APE1553-2/DS only
Note
(2)
:
GPIO=General Purpose Discrete I/O
