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3-1. Description of On-Board Switch Settings and LEDs
. . . . . LED
D4 to D19
1. Display function
The sixteen LEDs (green) indicate the status of the high
speed DMA (Direct Memory Access) bus in use in side the
FDDR-7000.
n
This LED turns on only when the SCS-15 board is in-
stalled in the slot No. 10.
When the LEDs D12 to D19 turn on, it indicates that the
respective channels of the video signal and audio signal are
issuing the bus request. (BUS REQUEST)
When the LEDs D4 to D11 turn on, it indicates the chan-
nels which are actually using the bus, among the respective
channels of the video signal and audio signal. (BUS
GRANT)
The numbers (1 to 6) of the respective video channels and
Audio channels correspond to the following LEDs.
video
BR
1
D12
2
D13
3
D14
4
D15
5
D16
6
D17
Audio
D18
Audio
D19
When the number of the video signal channels of the
FDDR-7000 is set to its maximum number, the LEDs D4
to D9 and D12 to D17 turn on.
(When the maximum number of channels is not set, LEDs
of the channels which are not set do not turn on.)
Refer to operation manual of FDDR-7000 for the usable
number of channels and options required for channel
configuration.)
3-6(E)
2. DMA bus operation indication
When looking at the illuminating condition of the LEDs, it
can be judged if the data transfer is performed successfully
to the respective video signal and audio signal channels.
Investigate the illuminating condition of the LEDs when
any errors occur. It makes possible to locate the cause of
the errors.
Operation of the LEDs when using the six channels of the
video signal, is shown below.
<During normal operation>
When the video four channel operation is in progress the
eight LEDs from D4 to D7 and D12 to D15 flash at high
speed. (They look as if they turn on dimly.)
When the BKFD-7600 audio option is added, the LEDs
D10 and D18 flash at a high speed.
<When error occurs>
(1) Either one of D4 to D10 turns on or flashes even
(2) Any one LED alone of D4 to D10 turns on or flashes
(3) All LEDs are turned off.
BG
D4
D5
D6
D7
D8
D9
D10 (option)
D11 (option)
though all of the LEDs D12 to D18 are turned off.
even though all of the LEDs D12 to D18 are flashing.
FDDR-7000 IM
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