Mackie Digital 8-Bus Service Manual page 21

TAPE CARDS continued
DIGITAL SIG
ANALOG
NAME ON
TAPE OUTPUT
TAPE BOARD
PAIRS
23 AND 24 DT4
21 AND 22 DT3
19 AND 20 DT2
17 AND 18 DT1
15 AND 16 DT4
13 AND 14 DT3
11 AND 12 DT2
9 AND 10 DT1
7 AND 8 DT4
5 AND 6 DT3
3 AND 4 DT2
1 AND 2 DT1
DIGITAL SIG
ANALOG
NAME ON
TAPE INPUT
TAPE BOARD
PAIRS
23 AND 24
DR4
21 AND 22
DR3
19 AND 20
DR2
17 AND 18
DR1
15 AND 16
DR4
13 AND 14
DR3
11 AND 12
DR2
9 AND 10
DR1
7 AND 8
DR4
5 AND 6 DR3
3 AND 4 DR2
1 AND 2 DR1
CARD TO WHAT THE SIGNAL
BACKPLANE IS CALLED ON
CONNECTOR THE BACKPLANE
AND PIN NO. AND DSP BOARD
J20-7,56 DT_8
J20-5,58 DT_6
J20-3,60 DT_4
J20-1,62 DT_2
J19-7,56 DT_16
J19-5,58 DT_14
J19-3,60 DT_12
J19-1,62 DT_10
J18-7,56 DT_24
J18-5,58 DT_22
J18-3,60 DT_20
J18-1,62 DT_18
CARD TO WHAT THE SIGNAL
BACKPLANE IS CALLED ON
CONNECTOR THE BACKPLANE
AND PIN NO. AND DSP BOARD
J20-8,55 DR0_U16
J20-6,57 DR0_U15
J20-4,59 DR0_U14
J20-2,61 DR0_U13
J19-8,55 DR0_U20
J19-6,57 DR0_U19
J19-4,59 DR0_U18
J19-2,61 DR0_U17
J18-8,55 DR0_U24
J18-6,57 DR0_U23
J18-4,59 DR0_U22
J18-2,61 DR0_U21
BACKPLANE
TO DSP
CONNECTOR
AND PIN NO.
NOTE: All three tape cards
J47-14
are identical, and the
difference in signal name
J47-10
comes from where each
card is fitted in the
J47-6
backplane slots. If a card is
fitted into slot 1-8, it
J47-2
connects to the
backplane's J18 and so for
J47-31
example, the card's DT2
becomes DT_20 on the
J47-27
backplane and DSP board.
If the card is in the 9-17
J47-23
slot, it uses J19 and so the
card's DT2 becomes
J47-19
DT_12.
J48-14
J48-10
J48-6
J48-2
BACKPLANE
TO DSP
CONNECTOR
AND PIN NO.
These are the signals
J47-16
transmitted to the DSP
board from the Tape
J47-12
inputs.
What happens is this:
J47-8
Two analog signals are
converted into digital and
J47-4
combined into one digital
signal.
J47-33
For example, analog
signals 23 and 24 (from the
J47-29
DB25 pin connector on the
rear panel) are converted
J47-25
and combined to create a
digital signal DR4 on the
J47-21
tape card. This is then
given a new name of
J48-16
DRO_U16 and sent to the
J48-12
DSP board using connec-
tor J47, pin 16.
J48-8
J48-4
DSP SIGNAL FLOW
21