Fat Boy Expansion: Theory of Operation
The Fat Boy KD-MSW8x4 HDTV Matrix Switcher series is expandable to as many as 44 config-
urable outputs, allowing for even greater input/output flexibility for the given eight input arrays.
This expansion feature is factory installed and shipped to the consumer as a pre-wired and
pre-tested combination of from two up to eleven KD-MSW8x4 HDTV Matrix Switchers. The
expansion packages are comprised of multiple KD-MSW8x4 units ganged together.
In the expansion configurations, the individual connectors of each input array, on each unit, are
connected to all other corresponding input array connectors on all of the other units (up to
eleven units for the massive KD-MSW8x4-8x44 8x44 HDTV Matrix Switcher configuration) of a
given expanded package. Each of the eight combined input fields is then supplied with a sin-
gle input array (R, G, B, PCM Audio, Left Audio and Right Audio). The resulting output arrays
(eight, or twelve, or sixteen, … up to 44), depending on the expansion package chosen, are
configurable in the same way as those of a single switcher. The stand-alone or combined
package KD-MSW8x4 HDTV Matrix Switcher is addressable in the same manner as described
prior, using either the supplied IR Remote Controller or via the RS-232 control port.
Using the same application example illustrated previously, the user will note that the input video
and audio sources remain the same. The signals for each of the inputs shown are supplied to
each of the additional units of a given expanded package via the parallel connection array
described earlier. The output array available (up to 44 with 11 base KD-MSW8x4 units) now
offers you additional interfaces for display devices and/or surround sound systems.
CAUTION: Do not tamper with
factory installed wiring as this
may lead to improper functioning
of equipment and conceivably
cause damage to the same.
The combined units provide the user with a virtually unlimited output capability (up to 44). As illustrat-
ed previously in this manual, up to eight individual inputs are available for an array of source devices,
ranging from VCR’s to DVD players and HDTV Set Top boxes.
The following Expansion Application Example is that of an expanded KD-MSW8x4 HDTV Matrix
Switcher Package (8x16). The four 8x4 interconnected switcher units provide, for the eight segment
input field (shown in gray), additional interfacing with an expanded array of sixteen (16) individual out-
puts (shown in red). The necessary wiring is factory installed and the expanded switcher package
shipped to the consumer ready for connection to the video and audio equipment of choice.
Page 15 of 21
KDMSW8x4 Operating Instructions
Page 14 of 21
Lockout Mode for Front Panel Pushbuttons
1.
Depress the R1 key followed by "9" to disable the front panel pushbuttons
(Note that in this mode, pressing the front panel pushbuttons will have no effect)
2.
Depress the R1 key followed by "0" to enable the front panel pushbuttons
Lockout Mode for IR Remote
1.
Depress R3 key and hold until LED array stops flashing (IR remote is now locked)
Working in the Lockout Mode for the IR Remote
1.
Depress R2 key
2.
Depress numerical output address
3.
Depress numerical input address
Exiting the Lockout Mode for the IR Remote
1.
Depress R3 key and hold until LED array stops flashing (IR remote is now unlocked)
FAT BOY EXPANSION OF THE BASE KD-MSW8x4
The Application Example provided earlier serves to illustrate the versatility of the KD-MSW8x4
HDTV Matrix Switcher, as the ideal interface device for virtually all user video and audio equip-
ment input and output configuration needs. Additionally the KD-MSW8x4 HDTV Matrix Switcher is
expandable to as many as 44 configurable outputs, allowing for even greater input/output flexibility for
the given eight input fields. The expansion feature is factory installed and shipped to the consumer as
a pre-wired combination of two or more KD-MSW8x4 HDTV Matrix Switchers.
CAUTION: If you have purchased an expanded configuration of the
Fat Boy Series HDTV Matrix Switcher line beyond the base 8x4 Matrix
Switcher, the multiple base units will come pre-connected from the facto-
ry with a special cable kit that has been tested for your configuration.
You are advised NOT to disconnect or reconfigure any of these cables.
The KD-MSW8x4 HDTV Matrix Switcher is available in the following expansion packages,
configured to provide input/output combinations ranging from 8x8 up to 8x44 (eight inputs x
forty-four outputs).
The entire Key Digital Fat Boy Series line of HDTV Matrix Switchers
KD-MSW8x4
8 x 4 HDTV Matrix Switcher (single base unit)
KD-MSW8x4-8 x 8
8 x 8 HDTV Matrix Switcher (2 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x12
8x12 HDTV Matrix Switcher (3 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x16
8x16 HDTV Matrix Switcher (4 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x20
8x20 HDTV Matrix Switcher (5 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x24
8x24 HDTV Matrix Switcher (6 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x28
8x28 HDTV Matrix Switcher (7 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x32
8x32 HDTV Matrix Switcher (8 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x36
8x36 HDTV Matrix Switcher (9 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x40
8x40 HDTV Matrix Switcher (10 base units of 8x4 and Cable Kit)
KD-MSW8x4-8x44
8x44 HDTV Matrix Switcher (11 base units of 8x4 and Cable Kit)
KDMSW8x4 Operating Instructions
Unit 1
Unit 2
Unit 11
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