VSS-401-x Installation and Operation Manual
Document # 540335, Rev IR, 10/2006
Page 17 of 21
Table #1 lists the possible DIP Switch configurations.
DIP switches #1 and #2 select the briefer video input source. This input is
routed to the output upon activation of the BRIEFER SELECT PIN.
DIP switches #3 and #4 select the number of available input sources –
one to four. Note: when configured for only one video source, the
SEQUENCE SELECT PIN and OUTPUT STATUS / RANDOM SELECT
PINs have no functionality. However, a different briefer video input may
be chosen using DIP switches #1 and #2. Configured this way, activation
of the BRIEFER SELECT PIN routes the designated briefer video source
to the output. Deactivation of the BRIEFER SELECT PIN returns the input
video source to Input #1.
DIP switches #5 through #8 select 75
Ω
termination for each input.
Normally, video sources are back-terminated with 75
Ω
to match
interconnecting cabling impedance. If termination is no concern, these
input terminations may be turned off. When un-terminated, the input
impedance is high (>10K
Ω
).
Table 1: Configuration DIP Switch Table
Switch # Description
Function
1
Briefer Channel Select 1 1 OFF/2 OFF = Input #1; 1 ON/2 OFF = Input #2
2
Briefer Channel Select 2 1 OFF/2 ON = Input #3; 1 ON/2 ON = Input #4
3
Number of inputs 1
3 OFF/4 OFF = Inputs 1,2,3,4. 3 ON/4 OFF = Inputs 1,2,3
4
Number of inputs 2
3 OFF/4 ON = Inputs 1,2. 3 ON/4 ON = Input 1.
5
Input #4 Termination
ON = input is terminated (75
Ω
)
6
Input #3 Termination
ON = input is terminated (75
Ω
)
7
Input #2 Termination
ON = input is terminated (75
Ω
)
8
Input #1 Termination
ON = input is terminated (75
Ω
)
As shipped from factory, configuration DIP switches are set to mimic
operation of most-often ordered model(s).
