FT638 – Digital Radio Box
6.Mainb oard configuraton
6.3.
BUSY or +12V (Connectors A1 + A2)
Ex factory, pin 5 of sockets A1 and A2 is configured for
BUSY signalling (not implemented, yet). In order to
supply voltage (+12V) to a connected device,
positons R153 (A1) and / or R154 (A2) have to b e
equipped with a zero sequence resistance.
Attention:
If pin 5 is configured for output of supply
voltage, a Major BOS must not b e connected to
sockets A1 or A2 b ecause its BUSY output would b e
destroyed!!
6.4.
Solder bridges (back of PCB)
In order to connect a Sepura console via FT638
IN/OUT version the two solder b ridges on the
b ackside of the b oard have to b e closed.
Attention:
With the standard configuraton as
, the proper audio
line from FT638 is not used when a call is started via
PEI commands! Please contact us if you need to apply
a configuraton like this, so we can find a suitab le
soluton.
-12-
FT638_eng (29.04.22)
C114
D1
ST8
C113
C3
5
C1
7
C50
C103
C7
2
C7
1
C6
7
C6
8
R29
C112
R52
R4
2
R41
1
3
4
5
6
7
8
2
T8
1
3
4
5
6
7
8
2
T7
R1
37
C115
7
13
1
ST13
8
1
ST2
R154
R153
