Operator`s manual

Model VR240 Audio Logging Recorder
5-10
January 2000
Section III. SIGNAL MONITORING, LEVEL INDICATOR,
AND CHANNEL STATUS
In any recording system, it is important to make sure that the input level is correct. If the level is
too high, it can cause distortion and clipping. If it is too low, you lose “dynamic range” and the
signal may sound noisier than necessary. As with all logging recorders, the VR240 has a
limited dynamic range. We do provide AGC (Automatic Gain Control) so that signals of wide
level variation can be recorded effectively. (Whether a channel uses AGC is determined during
configuration. Refer to paragraph 3-36.)
5-6. MONITOR.
You can confirm that your signals are present at the VR240 input and are of the correct level by
using the
Monitor
function.
a. Press the
Controls
soft key.
b. Press the
Monitor
soft key.
The
Monitor
menu shows the keys
Enable, Disable,
and
Done.
The purpose of this submenu
is to allow you to select the input channels you wish to monitor. As you enable individual or
groups of channels, the signals applied to their inputs will become audible.
Enabling (and disabling) channels is an additive (and subtractive) process. If, for example, you
enable channels 1 thru 3 and then enable channel 5, channels 1, 2, 3, and 5 will be audible
Upper: Not Ready
Controls
SysInfo Drive Config
MONITORING: All channels disabled
Enable Disable Done