TBS100/100D
SECTION 4
TBS100OPS
20/10/06
www.snellwilcox.com
Version 2 Issue 5
4.36
SWITCHES
Two push buttons and an 8 way DIL switch allow
various functions and modes to be set.
The DIL switch SW3 selects a particular function.
The push buttons SW1, SW2 allow the value of the
selected function/parameter to be adjusted.
Note that to select the preset value both
buttons should be pressed together
.
These switches allow the module to be operated
when an active front panel is not available.
FUNCTION AND MODE SELECTIONS
DIL SWITCH FUNCTIONS SW3
By setting these switches various modes of
operation may be selected.
(Down is ON and Up is OFF)
Position 1 and Position 2
These two positions allow the input to be selected.
Input
Position 1
Position 2
CVBS A
OFF
OFF
CVBS B
ON
OFF
YC
ON or OFF
ON
Position 3
Setting this to ON the decoder will correctly process
a NTSCJ signal (an NTSC signal without pedestal)
Position 4
When set to ON this allows the unit to produce a
test pattern
signal as an output.
When the test pattern is selected the ProcAmp
functions are bypassed.
The pattern list (Black, 75% Color Bars, 100% Color
Bars and Multiburst) will be cycled through by
operating the push buttons SW1 and SW2
Position 5
When set to ON the output will become a frozen
picture of the last frame.
Position 6 and Position 7
These two positions allow the ProcAmp functions to
be enabled and adjustments made to selected
parameters.
Parameter
Position 6
Position 7
No functions enabled
OFF
OFF
Luminance Gain
ON
OFF
Black Level
ON
ON
Chrominance Gain
OFF
ON
Luminance Gain
Using the push buttons SW1, SW2 the gain may
be adjusted by ±3 dB in steps of 0.1 dB.
Preset setting is to the calibrated value of 0 dB.
Black Level
Using the push buttons SW1, SW2 the pedestal
may be adjusted by ±102.4 mV in steps of 1.6 mV.
Chrominance Gain
Using the push buttons SW1, SW2 the gain may
be adjusted by ±3 dB in steps of 0.1 dB.
Preset setting is to the calibrated value of 0 dB.
Position 8
When set to ON the unit will lock to an incoming
valid reference signal with parameters set using
this screen.
When set to OFF the output signal will be
free-running. In this mode the frequency accuracy
will be ±10 ppm.
