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(18)
WEIGHTING key
An on/off key with an LED that works only.when the
Internal
circuit is equipped with a weighting filter.
If fitted,
the circuit
provides a weighting characteristic with the LED in the key on.
(19)
80 kHz LPF key
On/off key with an LED.
When this key is on,
the LED is lit and a
low-pass filter that passes frequencies below 80 kHz is Inserted
into the circuit.
(20)
30 kHz LPF key
This key functions like
(l9)
but it passes frequencies below 30
kHz.
(Keys
(G)
and
(20)
turn on and off
independently of each
other,
though they do not turn on at the
same time
(toggle
operation).)
(21)
400 Hz HPF key
On/off key with an LED.
When this key is on,
a high-pass filter
that passes frequencies above 400 Hz is
inserted into the circuit
and the LED lights.
(22)
MODE select keys
A set of four keys with LED's.
The
instrument assumes the
following modes according to the
settings of
these keys.
Table 4-1
Mode
switch functions
Key with
lighting LED
Operation
Mode
A
FREQ y
Increases or decreases frequencies
Normal mode
_ A
AMPTD
y
Increases or decreases output
amplitudes
RCL
Recalls 16 memory registers from A-l
to D-4
Preset mode
STO
(WRITE)
Stores data in 16 memory registers
from A-l to D-4.
o
04
O
■
I
CO
'CC
<s
?v
4-5
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