Yamaha RM602 - Manual (Page 7)

12. EFFECTS SEND MASTER LEVEL
This controls sets the overall level of the effects mix—
set up by the EFFECTS control on each input channel —
fed to the EFFECTS SEND jack. Normally, this control .
will be set to provide the optimum input level for the
effects device you are using. .
13. MONITOR MASTER LEVEL
This control determines the overall level of the monitor
mix —set up by the MONITOR level and PAN controls
on each input channel—fed to the stereo MONITOR
OUT jacks and the PHONES jack. Use the master
MONITOR control to set a comfortable headphone
listening level.
14. MASTER RADERS
These controls independently set the overall output level
from the left and right stereo busses. These signals ap­
pear at the STEREO L OUT and STEREO R OUT jacks.
15. STEREO PEAK LEVEL METER
In the input fader section we discussed the importance
of proper fader setting in order to achieve the best pos­
sible sound quality. The RM602's LED peak meters are
a tremendous aid in setting optimum fader levels.
Two meters are provided - one each for the left and
right stereo output channels. Each meter consists of 13
LED segments that light in sequence to show the peak
signal level for the respective channel. Meter display
range is from -20 dB to -t-8 dB. Levels below 0 dB
are displayed in green, 0, -t-1 and -1-3 dB levels are
displayed in orange, while
-t-5 and -1-8 dB levels are
displayed in red. Watching the meters you can easily see
when signal levels are high enough to present a danger
of overload distortion — signals that light the red LEDs
are likely to cause distortion. On the other hand, if the
meters almost never reach the 0 dB level, then the over­
all program level is too low. Once the optimum program
level has been set, peaks in the program will cause the
orange LEDs to flicker occasionally, and most of the
green LEDs will stay lit most of the time. This applies
mainly to the average music program. Some types of
program will have a completely different effect on the
meters, requiring appropriate level adjustment. In general,
though, it is a good idea to avoid a lot of peaks in the
red region. Also remember that when only one instru­
ment is playing the level might look quite low on the
meters, but when instruments connected to all six
inputs start to play their individual levels can add up
to overload distortion. So check the meters when the
entire program is playing.
16. HEADPHONE JACK
This is a convenient feature in that it lets you directly
plug in any standard pair of stereo headphones'for
monitoring without the need for an external amplifier.
17. POWER SWITCH
This is the power switch. When the power is turned
ON, the lowest position on the level meter ("oo") will
light up.