7830 Dual input channel 3-31
Revision J2005-2 J-Type
616167 +)#(4#%RRVW2&XW#DQG#) UHTXHQF\#&RQWURO
A dual-concentric potentiometer where the ‘inner’ knob is the ‘Boost/Cut’ control for
the EQ section and the ‘outer’ knob is the ‘Frequency’ potentiometer.
Boost/Cut ±18 dB
Frequency Variable from 1.5kHz to 15kHz
The positions of the ‘boost/cut’ and ‘freq’ potentiometers are recorded during a SAVE
command.
616168 +0)5#(4#3RW#1XOO#/('V
Three Null LEDs that illuminate if the position of the ‘Q’, ‘Boost/Cut’ or ‘Frequency’
potentiometers in the MF2 EQ section are in a position different from that pro-
grammed.
Upper LED “dB” Null LED for ‘Boost/Cut’ pot
Middle LED “Q” Null LED for ‘Q’ pot
Lower LED “Hz” Null LED for ‘Frequency’ pot
To recall the programmed position, rotate the appropriate potentiometer until the
LED goes ‘out’.
616169 +0)#(4#¶4·#&RQWURO
The ‘Q’ control varies the bandwidth of the EQ section in the range Q=1 to Q=3. A
low value of Q gives a wide bandwidth. This means that a relatively large range of
frequencies (either side of the centre frequency selected by the ‘Frequency’ control)
have boost/cut applied. As the value of Q is increased, the bandwidth is reduced, so
that a very much smaller range of frequencies have boost/cut applied. The position
of the ‘Q’ potentiometer is recorded during a SAVE command.
61616: +0)#(4#%RRVW2&XW#DQG#)UHTXHQF\#&RQWURO
A dual-concentric potentiometer where the ‘inner’ knob is the ‘Boost/Cut’ control for
the EQ section and the ‘outer’ knob is the ‘Frequency’ potentiometer.
Boost/Cut ±18 dB
Frequency Variable from 400Hz to 4kHz
The positions of the ‘boost/cut’ and ‘freq’ potentiometers are recorded during a SAVE
command.
61616; /0)#(4#3RW#1XOO#/('V
Three Null LEDs that illuminate if the position of the ‘Q’, ‘Boost/Cut’ or ‘Frequency’
potentiometers in the MF1 EQ section are in a position different from that pro-
grammed.
Upper LED “dB” Null LED for ‘Boost/Cut’ pot
Middle LED “Q” Null LED for ‘Q’ pot
Lower LED “Hz” Null LED for ‘Frequency’ pot
To recall the programmed position, rotate the appropriate potentiometer until the
LED goes ‘out’.
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