Kramer Electronics, Ltd.
8
6
INSTALLATION
6.1 Rack/Table Mounting
The VM-9S and the VM-9YC amplifiers may be rack mounted in a standard 19” (1U) EIA rack assembly using
special adapters (see section 4.1 "mechanical adapters"). These adapters allow 1or 2 machines to be installed on
each adapter, depending on the model. The 103YC and the 104L can be table mounted using the two brackets
enclosed in the box or installed in rack adapters that can accommodate 3 or 8 machines. To mount any of the
amplifiers into the rack, follow the instructions in the installation guide enclosed with the adapter. These devices
do not require any specific spacing above or below the unit for ventilation.
7
CONNECTING TO VIDEO DEVICES
Video sources and output devices (such as monitors, projectors or recorders) may be connected to the amplifiers
using the BNC or 4P type connectors located on the back of the units. Unused inputs are terminated to 75ohm,
and active inputs should be terminated by the connecting source. All signal connections that use more than one
cable interconnecting between devices should be of equal length.
8
CONNECTING TO AUDIO DEVICES (VM-9S only)
Audio sources and output devices (such as amplifiers or recorders) may be connected to the line amplifier using
the RCA type connectors located at the back of the machine.
9
USING LINE AMPLIFIERS
As a basic rule, line amplifiers should be installed as close as possible to the source to achieve the best results.
If the amplifier is located close to the acceptor, then it also amplifies all the noise accumulated along the way
degrading the signal quality.
9.1 Powering on the Amplifier
NOTES
1. The Line amplifier should only be powered on after
all connections are completed and all source devices
have been powered on. Do not attempt to connect or
disconnect any video, audio or control signals to the
amplifier while it is powered on!
2. The socket-outlet should be near the equipment and
should be easily accessible. To fully disconnect
equipment, remove the power cord from its socket.
For the VM-9S/VM-9YC only:
1) Press the toggle switch on the far-left of the front panel to the up position. In the up position, the toggle
switch illuminates.
2) Operate the acceptors.
For the 103YC/104L only:
1) Connect the DC socket to the DC source. Observe proper polarity!
2) Observe that the Led on the front panel is illuminated.
3) Operate the acceptors.
9.2 Looping (VM-9S, VM-9YC only)
The looping function enables the operator to connect several machines to a video/YC source. The operator must
always switch the termination switch of the
first
and
middle
machines to "
Hi-z
". The
last
amplifier’s
termination switch should always be at "
75ohm
" to maintain well-matched lines (of 75ohm impedance) from
the first to the last amplifier. Note that if the looping function is not used, the termination switch should be set to
"
75 ohm
".
