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Kramer Electronics Ltd.
4
1.2
Factors Affecting Quality of Results
There are many factors affecting the quality of results when signals are transmitted from a source to an acceptor
as described in Table 1:
Table 1: Factors Affecting Quality of Results
FACTOR
EFFECT
Connection cables
Low quality cables are susceptible to interference; they degrade signal
quality due to poor matching and cause elevated noise levels. They should
therefore be of the best quality.
Sockets and connectors
of the sources and
acceptors
So often ignored, they should be of highest quality, since "Zero Ohm"
connection resistance is the objective. Sockets and connectors must also
match the required impedance (75ohm in video). Cheap, low quality
connectors tend to rust, thus causing breaks in the signal path
Amplifying circuitry
Must have quality performance when the desired end result is high
linearity, low distortion and low noise operation
Distance between
sources and acceptors
Plays a major role in the final result. For long distances between sources
and acceptors, special measures should be taken in order to avoid cable
losses. These include using higher quality cables or adding line
amplifiers.
Interference from
neighboring electrical
appliances
These can have an adverse effect on signal quality. Balanced audio lines
are less prone to interference, but unbalanced audio should be installed far
from any mains power cables, electric motors, transmitters, etc. even
when the cables are shielded
2
SPECIFICATIONS
401Dxl
Configuration
Decoder / Switcher
Inputs
1 Composite Video, 1Vpp/75 ohm on a BNC,
1 s-Video on a 4P connector, Y: 1Vpp/75ohm,
C: 0.3Vpp/75ohm.
Outputs
1 s-Video on a 4P connector, Y: 1Vpp/75ohm,
C: 0.3Vpp/75ohm.
Controls
Input selector Switch.
Video Bandwidth
3.7 MHz -3dB (CV in - YC out); >800 MHz -3dB (YC in - YC out).
Nonlinearity
0.5%.
Crosstalk
-56 dB @ 5 MHz.
Coupling
AC (CV to YC); DC (YC to YC)
Differential Gain
0.9 %.
Differential Phase
0.5 Deg.
K-Factor
2.1 % (Y/C to CV).
Luma S/N Ratio
69 dB.
Maximal Input
1.4 Vpp / 75 ohm, Composite; >4Vpp / 75 ohm YC.
Dimensions (W, D, H)
12 x 7.5 x 2.5 (cm)
4.7" x 2.95" x 0.98" (W, D, H.)
Weight
0.3kg. (0.56 lbs.) Approx.
Power Source
12VDC, 90 mA.