DDA-4010
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Revision 01
If one of the input’s data rate does not match its set data rate, but the other one does, with
Automatic Changeover enabled the other will take control of both outputs. The invalid
INPUT LED and its corresponding data rate LED will flash. In this example input B is fed with
a signal at the SD rate. Input A has taken control of B’s outputs, in this case A is being fed
with an HD rate source, hence B’s data rate is obviously set for HD-SDI only rate.
Note that this LED configuration scenario is also possible with the DDA-4010 set up as a
single 1 IN, 8 Out DA with Automatic Changeover enabled In this case A is set for HD-SDI
only rate and is the primary input whilst B is being fed with a signal at the SD rate.
If both of the inputs data rates do not match its, or the other’s set data rate, with
Automatic Changeover enabled neither will take control of any of the outputs. In this
example input A is being fed with either an SD or an HD data rate, likewise input B. It is not
possible to tell by looking at the LEDs which input is being fed with the SD or HD signal, but
as all INPUT, SD and HD LEDs are all flashing it is obvious that both A and B’s data rates have
been set up for 3G-SDI only rate.
If the signal feeding input A matches that of B’s set data rate and the signal feeding input B
matches that of A’s set data rate, where A and B’s set data rate are not set the same as
each other, it is possible for input A to be feeding B’s outputs whilst input B is feeding A’s
outputs.
In this example A has been set at the HD-SDI only rate and B has been set for the SD-SDI
only rate. Input A is being fed by a signal at the SD rate, which is being fed to B’s outputs as
indicated by the INPUT A LED not flashing whilst A’s SD data rate LED is flashing and B’s SD
data rate LED is not flashing. Input B is being fed by a signal at the HD rate, which is being
fed to A’s outputs as indicated by the INPUT B LED not flashing whilst B’s HD data rate LED
is flashing and A’s HD data rate LED is not flashing.
Non-Reclocking Mode:
The rate set only applies to the reclocking mode. In non-reclocking mode the reclocker is bypassed allowing other
data rates to pass through. Whilst in the non-reclocking mode, if an input signal is present, the corresponding front
panel INPUT LED will illuminate, but the 3G, HD and SD LEDs will not except in the case where the input data rate
actually corresponds to a 3G, HD or SD rate. Likewise, in the reclocking mode, if an input is not at one of the
standard 3G, HD or SD rates the INPUT LED will flash and none of the 3G, HD or SD LEDs will illuminate or flash.
Front Panel Monitor Outputs:
With the DDA-4010 set up as a Dual 1 In, 4 Out Distribution Amplifier, the ‘CH.A’ BNC
connector monitors the signal connected to INPUT A and the ‘CH.B’ BNC connector
monitors the signal connected to INPUT B.
In the Dual 1 In, 4 Out mode, the Automatic Changeover mode has no effect on the BNC
monitoring connectors, whether it is enabled or disabled, as in the case of when set up as a
Single 1 In, 8 Out DA.
Relay Bypass Option:
With the DDA-4010 fitted with the optional ZDA-4010RL relay bypass rear assembly, on loss of power or removal of
the card from the frame, the INPUT A signal is automatically routed via a relay to the output ‘OUT 1A’ port, as is
the INPUT B signal to the output ‘OUT 1B’ port.
CH.A
CH.B
A B
INPUT
SD
HD
3G
A B
INPUT
SD
HD
3G
A B
INPUT
SD
HD
3G
