VM-5YC
1:5 s-Video/Composite/Audio Distributor
Several words on Distribution Amplifiers:
Distribution amplifiers distribute one signal to several users. They
vary in the number of inputs, looping capability, number of outputs,
operating format, bandwidth and input/output coupling. Distribution
amplifiers are used to distribute one video and/or audio source to several
video/audio acceptors for simultaneous recording or monitoring one source.
A good quality distribution amplifier amplifies the incoming signal
(video and audio), pre-compensates the signal for potential losses (resulting
from the use of long cables, for example) and generates several identical
buffered and amplified outputs.
Often, a signal processor is inserted between the source and the
distribution amplifier for correction and fine-tuning of the source signal
before multiplication, thus all copies are corrected in the same way.
There are many factors effecting signal quality when transmitted from
a source, to an acceptor:
Source and acceptor signal handling capability - as different brands offer
different qualities and the result is limited by the lowest quality part
performance. Using a low quality source will always result in low quality
duplicates.
The connection cables should be of the best quality you can afford. Low
quality cables are susceptible to interference, deteriorate signal quality due
to poor matching and cause elevated noise levels.
Sockets and connectors of the sources and acceptors - so often ignored,
should be of best quality, as "Zero Ohm" connection resistance should be
assured. Sockets and connectors should match the required impedance (75
ohms in video). Cheap connectors tend to rust, causing breaks in the signal
path.
Amplifying circuitry quality is extremely important and is needed for
high linearity, low distortion and low noise operation.
The distance between source and acceptors plays a major role in the
result. If long distances (over 15 meters) exist between sources and
acceptors - special means should be taken in order to avoid cable loss, such
as using higher quality cables or if necessary - line amplifiers.
Interference from neighboring appliances may have an adverse effect on
signal quality. Balanced audio lines are less prone to interference, but
unbalanced audio and video lines, even though the cables are shielded,
should be installed far away from mains carrying cables, electric motors,
transmitters etc.
The KRAMER VM-5YC
The KRAMER VM-5YC is an extended bandwidth, state-of-the art
YC/Video/Audio Stereo Distribution Amplifier designed for studio and other
demanding applications. The VM-5YC splits a single input source into five
identical outputs with no discernible signal degradation. Hundreds of copies
of videotapes can be made at the same time using several VM-5YC units
chained through the looping inputs. The user may select video AC or DC
coupling for full flexibility.
The VM-5YC has an additional unique feature - by a flip of a switch,
it allows converting a YC source to 5 Composite Video outputs.
Operation:
⌦ Connect composite or Y/C video and audio stereo sources to the
appropriate inputs of the VM-5YC.
⌦ Select with the rear-mounted switch whether AC or DC coupling is
needed.
⌦ If an Y/C input is connected, select with the MODE rear switch whether
you want to distribute plain Y/C signals (switch is on the "YC" side) or
convert the Y/C input to five Composite Video outputs (switch is on the
"YC to CV" side.)
⌦ Connect up to five Video/s-Video/Audio acceptors to the output sockets.
⌦ If looping is needed, connect a second unit to the "LOOP" sockets, toggle
the termination switch on the first unit into the "Hi-Z" position and the
next unit into "75 Ohms" position.
⌦ Operate source, acceptors and the VM-5YC.
Typical applications:
Video duplication studios, delivering undiminished quality
video duplicates.
Video Showrooms, delivering an identical picture to several
monitors.
Easy on-line conversion between YC to Composite.
Technical Specifications:
INPUTS: 1 Video looping, 1Vpp/75 Ω Composite (BNC),
1Vpp/75 Ω (Y), 0.3Vpp/75 Ω (C) on “4P” connector.
1 Audio Stereo looping 1Vpp/ 50KΩ on RCAs.
OUTPUTS: 5 Video 1 Vpp/75 Ω (Composite or “Y”),
5x0.3Vpp/75Ω (C).
5 Audio Stereo, 1Vpp /100 Ω on RCAs.
VIDEO BANDWIDTH: 90 MHz –3dB (Y).
AUDIO THD: Less than 0.04%.
VIDEO S/N RATIO: Better than 73 dB.
AUDIO S/N RATIO: Better than 74 dB.
K-FACTOR: 0.05%.
COUPLING: DC/AC (video), AC audio.
DIFF. GAIN: 1.1 %.
DIFF. PHASE: 0.13 Deg.
MAX. VIDEO OUTPUT: 2 Vpp.
POWER SOURCE: 230VAC 50/60 Hz (115V USA).
DIMENSIONS: 19”, 1U rack mountable.
Please note that if the output signal is disturbed or interrupted by very strong
external electromagnetic interference, it should return and stabilize when such
interference ends. If not, turn the power switch off and on again to reset the
machine. The socket-outlet shall be installed near the equipment and shall be easily
accessible. To fully disconnect equipment, remove power cord from its socket.
VM-5YC
USER MANUAL
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