9
control should normally remain at its
center detent setting.
In M/S recording, the Balance setting
controls the ratio of mid to side signal
and thus will affect the stereo image
width and the maximum recording
angle.
8. Signal level indicators
The two LEDs <1> serve as a rough
indication of signal levels; they always
indicate the higher level of the two
channels. The yellow LED can and
should be lit very frequently, but if the
red LED is lit at all it should be seldom
and only quite briefly.
9. Low-cut filter
A 20 Hz high-pass filter with a slope
of 18 dB/octave is active at all times. It
suppresses infrasonic interference, but
is otherwise nearly inaudible in its
effect.
An additional, "soft" low-cut filter
(150 Hz, 6 dB/octave) can be activated
by switching the "FILTER" toggle
switch to the down position, in order
to reduce wind and solid-borne noise
even further, or to compensate for the
bass boost which directional micro-
phones exhibit when used close to
sound sources ("proximity effect"). But
this filter should be used only when
needed since it has a distinctly audible
effect.
position. Now you can turn the unit on.
For ordinary stereo recordings (not
M/S), the cable marked in red should
carry the right channel signal; it should
carry the signal from the "side" (figure-
8) capsule in M/S recording.
6. Setting the preamp gain
When recording, the GAIN control
<2> should be set as high as possible
for the sake of a good signal-to-noise
ratio. It is set correctly if the red LED of
the signal level indicator <1> lights up
only rarely and very briefly during the
loudest passages to be record ed.
Setting the gain any higher will pose a
danger of overload distortion.
When using the VMS 5 U for dema-
trixing after recording, the GAIN control
should be set to 4 or 10 dB again by
observing the yellow and red LEDs.
Please note:
Phantom power should
be turned off when dematrixing after
recording. Please remove headphones
or turn the headphone volume control
to its lowest setting when turning off
phantom powering.
7. Balance setting
To compensate for a possible differ-
ence in the sensitivity of the micro-
phones, the Balance knob <3> can be
used to adjust the relative gain of the
two channels. When microphones of
equal sensitivity are used, the balance
Summary of Contents for VMS 5 U
Page 3: ...3 15 16 19 17 18 8 9 10 11 12 13 14 1 2 3 6 7 4 5...
Page 18: ...18 16 Block diagram...
Page 19: ...19 Frequency response curves above without low cut filter below with low cut filter...
Page 22: ...22...
Page 23: ...23...
