Axon Synapse ASV12, Техническое руководство

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11
or
Variable
. The default setting is
Fixed
. In
Fixed
mode
the input stage is static and expects a compliant input signal with
the correct amplitude. In Auto-Brst an Automatic Gain Control is
enabled, and the gain is based on the color subcarrier’s amplitude.
In
Auto-Sync
mode an AGC stage is enabled and the input
voltage is adjusted automatically depending on the sync
amplitude. If the sync is smaller then 300 mV, the video input
signal will be amplified in the exact amount to give 300 mV sync
amplitude. If the sync amplitude is too high, the opposite will
occur. And in
Variable
mode the input signal is manually
adjustable.
Var-Gain
This is the adjustment menu for the
Variable
mode mentioned
above. The range of adjustment is
0,26x
to
1,99x
. The
default setting is
1,00x
.
Ref-Input This setting allows the user to determine which reference input is
used to lock the ASV12. Input 1 is the uppermost input of on the
RRC18 rack controller connection panel at the rear of the SFR18,
Input 2 is the lower. The SFR04 has one reference input.
The available settings for
Ref-Input
are
1
,
2
and
Auto
. The
default setting of
Ref-Input
is
1.
1
,
2
: Lock to the reference at the respective input.
Auto
: Selects
Ref_1
to 625,
Ref_2
to 525. If a signal is not
connected the reference the reference will automatically be
locked to the reference.
H-Delay
The
H-Delay
setting allows adjustment of the horizontal phase
of the output signal with respect to the selected reference input.
The
H-Delay
setting gives a delay in addition to the reference
timing. For example, if H-Delay is set to 10 samples, the output
signal will be delayed by the reference 10 samples of
37ns, therefore the delay = Ref 37ns x10. The signal is
delayed (advanced) with respect to the phase of the reference
signal.
In 625/50 the adjustment range of H-Delay is 0-1727 samples,
0..64 µs (one PAL TV line).
In 525/60 the adjustment range of H-Delay is 0-1715 samples,
0...63.556 µs (one NTSC TV line).
The default setting is
0
samples.
The Delay of the card in Delay mode is 273 µs.
V-Delay
V-Delay
setting allows adjustment of the vertical phase of the
output signal with respect to the selected reference input.