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REF ADJ
(relative reference adjustment)
Control
(variable resistor)
with a pull switch.
This control
13
disabled when the pull switch is pressed.
When the switch
has been pulled,
the control changes the deflection of the
meter ^9^) by about 10 dB during level measurement.
This control
shifts the reference
point on the scale when only the relative
level ratio
is measured.
This control is disabled during S/N
or distortion measurement.
Usually keep this control pushed in.
UNCAL light
Annunciator light to indicate that the REF ADJ control
(lo)
is
pulled making the meter (^T) uncalibrated in level measurement
function.
MONITOR OUTPUT
connector
A BNC receptacle wich provides an AC output proportional to the
deflection on meter ©•
MEASUREMENT RANGE select keys
Two keys select the range for indicator (^9^)
.
The up (A)
and the
down
( | )
arrows indicate direction in which the range indicator
LED's (^8^) light when respective key is pressed.
A single press
of the key changes the range by one.
If the key is held, the
range will shift continuously after a slight delay.
RANGING key
The key containing an LED,
alternately selects automatic ranging
(the LED is off ... AUTO)
ro manual ranging
(the LED is on ...
MANUAL) .
When AUTO is selected, ranges for both meters
and (^9^)
are selected automatically.
INPUT RANGE OVER/UNDER keys
A pair of keys each containing a red LED.
The key have no effect
in level measurement.
In S/N or distortion measurement, the LED
lights to warn the user an excessive
(OVER)
or insufficient
(UNDER)
input signal level.
Use the keys to select ranges on
meter
.
Warning is suppressed when automatic ranging has been
selected.
In manual ranging, press the key in which the warning
LED lights and select an appropriate range.
The selected range
will be indicated by one of the upper six of the meter range
indicator LED's (^8^) .
Function of the two keys marked with arrows
and how ranges are switched are the same as described for keys (l3).
4-3
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