P
P
r
r
o
o
-
-
B
B
e
e
l
l
L
L
t
t
d
d
T
T
e
e
c
c
h
h
n
n
i
i
c
c
a
a
l
l
m
m
a
a
n
n
u
u
a
a
l
l
H
H
U
U
-
-
F
F
r
r
e
e
e
e
w
w
a
a
y
y
R
R
a
a
n
n
g
g
e
e
S
S
y
y
s
s
t
t
e
e
m
m
U
U
s
s
e
e
r
r
G
G
u
u
i
i
d
d
e
e
3
3
5
5
D
D
i
i
a
a
g
g
n
n
o
o
s
s
t
t
i
i
c
c
L
L
E
E
D
D
S
S
The 8 diagnostic LEDS (Yellow) are employed as defined in the table below.
LED
Function
1
POWER ON
2
RESET
3
CONTROL CARD ACTIVE
4
Flashing at 2Hz - ACTIVE CONTROLLER
Flashing at 1Hz - IDLE CONTROLLER
5
CROSSPOINT SET - FLASHES WHEN SET
6
NO HANDSHAKE FROM A MODULE
7
REF 1 INPUT DETECTED
8
REF 2 INPUT DETECTED
4,8
4 on & 8 flashing: R/W error with RAM
4,7
4 on & 7 flashing: Checksum error in EPROM
n
n
3
3
.
.
4
4
S
S
o
o
f
f
t
t
w
w
a
a
r
r
e
e
c
c
o
o
n
n
t
t
r
r
o
o
l
l
l
l
a
a
b
b
l
l
e
e
p
p
r
r
o
o
c
c
e
e
s
s
s
s
e
e
s
s
This section lists the software controllable processes present on the 2440 control
card:
·
selecting trigger method to switch, i.e. 525/625/TTL pulse/crash
·
active/Idle Changeover control
·
setting crosspoints and audio features such as summation and channel swap
·
reading switcher card handshakes
