Honeywell MAXPRO-Net Commissioning Manual page 43

3.4 COMBINING, CONTINUED
Connecting Subracks
In a combining configuration (figure 3.5), video signals (e.g. cameras) are connected to
the video inputs of the pre-selection subracks. Pre-selection of those video signals are
fed out to the combiner subracks.
In the combiner subrack, the video input (fed out of the pre-selection subrack) is then
selected to the output for display on the monitor. The outputs of the combiner subracks
connect to video output devices, like monitors or VCRs.
Pre-selection subracks used in combining, are denoted by the alpha characters (A
Referring to figure 3.5 again, outputs from pre-selection subrack A are numbered 1A, 2A,
3A and so on. Outputs from pre-selection subrack B are also numbered accordingly
(2A, 2B, 2C and so forth).
Video inputs to each channel of the combiner subrack are also labeled (A
channel only accepts a single video input from each pre-selection subrack.
i.e.:
channel 1 of the combiner subrack. The second output from the first pre-selection
subrack A, 2A, connects to the first input (A) of channel 2 of the combiner subrack. This
goes on until the N
first input (A), of the N
Likewise, the first output (1B) from the second pre-selection subrack B, connects to the
second input (B) of channel 1 of the combiner subrack. The second output, 2B,
connects to the second input (B) of channel 2 of the combiner subrack. This continues
till the N
In a combining configuration, any video signal traveling from the source to the output of
the combiner subrack, only goes through two subracks. With combining, the video
system can easily accommodate 1024 video inputs to 256 video output channels, and
still maintain very high picture quality.
Rev. B
Output 1A, from the first pre-selection subrack A, connects to the first input (A) of
th
output from the first pre-selection subrack A, is connected to the
th
channel of the combiner subrack.
th
output of the pre-selection subrack.
3-7
T).
T). Each
HMXMC001013
31-Mar-06