5.4 Getting To Know Your VM-80A Amplifier
The KRAMER
VM-80A
is a Broadcast quality, state-of-the-art, balanced stereo audio distribution
amplifier designed for demanding applications, such as broadcast and production studios. The
VM-
80A
has two balanced stereo audio inputs, each splitting the input source into four identical outputs.
The
VM-80A
can function as a 1:8 DA or as two 1:4 DAs. It has trimmers on the front panel to fine
tune levels of each channel individually. Units in the 80 series come in a convenient, compact size
enclosure. Any two units fit side by side in a 19" rack using a special 1U-rack adapter. To achieve a
larger distribution system, the inputs of several machines may be looped by a parallel connection. For
signal enhancement and noise reduction, an audio signal processor may be inserted. Front/rear panel
features of the
VM-80A
are described in Figure 4 and Table 4.
NOTE
For operation instructions refer to sections 8.1, 8.6.
Figure 4: VM-80A Front/Rear Panel Features
Table 4: VM-80A Front/Rear Panel Features
No. Feature
Function
1.
Illuminated
Power
Switch
Supplies power to the unit.
2.
1:8
operating mode touch switch
(Illuminated when pressed)
Splits channel "
1
" input to all 8 outputs (channels
"
1
"&"
2
")when pressed.
3.
2x1:4
operating mode touch switch
(Illuminated when pressed)
Splits channels "
1
"&"
2
" inputs to output channels "
1
"&"
2
"
respectively when pressed.
4.
CH 2 LEVEL Left
trimmer
Controls Channel "
2
" (left) audio gain.
5.
CH 2 LEVEL Right
trimmer
Controls Channel "
2
" (Right) audio gain.
6.
CH 1 LEVEL Left
trimmer
Controls Channel "
1
" (left) audio gain.
7.
CH 1 LEVEL Right
trimmer
Controls Channel "
1
" (Right) audio gain.
8.
CH 1 IN (L,R)
terminal block connector
Stereo audio balanced input.
9.
CH 2 IN (L,R)
terminal block connector
Stereo audio balanced input.
10.
CH 2/1 OUTPUTS (L,R)
terminal block
connectors
Amplified and buffered audio outputs.
11.
CH 1 OUTPUTS (L,R)
terminal block
connectors
Amplified and buffered audio outputs.
12. Power Connector
A 3-prong AC connector allows power to be supplied to the
unit. Directly underneath this connector, a fuse holder houses
the appropriate fuse.