Chapter 6—Applications
The 1YDM provides several methods to expand system capa-
bilities and overall flexibility. This chapter explores two of
these methods by explaining them and going through an ex-
ample of each. This chapter also explores the possibility of
combining the methods and provides examples of them com-
bined.
This chapter covers:
q
Paralleling Inputs
q
Loop Back
q
Further Examples Combining Parallel Inputs and Loop
Back
6.1
Paralleling Inputs
Each input/output (I/O) board in a 1YDM enclosure is its own
switching environment, so the inputs of one board cannot be
switched to the outputs of another board. However, parallel-
ing inputs allows any input to switch to any output in the
distribution matrix that has an identical signal path. By par-
alleling inputs, the set of configuration possibilities for the
distribution matrix expands to include: 4x12, 8x12, 8x16
(mono audio), 12x8, 8x32 (using 8x16 boards only), and 16x32
(using 16x16 boards only).
To parallel inputs, split an input signal between two or more
input connectors. When splitting a video input signal, make
sure all but one of the video boards in each split set are high
impedance. Splitting a single video input signal more than
four times is not recommended. More than four signal splits
would be uncontrollable since there are only four levels avail-
able on this matrix and a distribution amplifier would be
required to boost the signal. See section 5.3.1, “Impedance
Jumpers,” for more information about setting the impedance.
Audio inputs do not require any impedance changes. If your
I/O boards do not have impedance jumpers and you are not
certain that one of them is high impedance, please contact
your authorized AutoPatch dealer.
Note:
Set all but one of the video boards to high impedance.
Setting all or setting none to high impedance may pro-
vide an improper load to the source video device and
is not recommended.
