3-30 7830 Dual input channel
J-Type Revision J2005-2
616165 +)#(4#3RW#1XOO#/('V
Three Null LEDs that illuminate if the position of the ‘Q’, ‘Boost/Cut’ or ‘Frequency’
potentiometers in the HF 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’.
616166 +)#(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’ potenti-
ometer is recorded during a SAVE command.
3.3.34 HF EQ Boost/Cut and Frequency
Control
3.3.37 HMF EQ Boost/Cut and Frequency
Control
3.3.40 LMF EQ Boost/Cut and Frequency
Control
3.3.43 LF EQ Boost/Cut and Frequency Con-
trol
3.3.48 LPF Frequency
3.3.49 LPF Frequency Pot Null LED
3.3.50 HPF Frequency
3.3.51 HPF Frequency Pot Null LED
3.3.54 Main PFL
3.3.56 Channel Mute
3.3.57 Recall Null Direction LEDs
3.3.32 HF EQ Pot Null LEDs
3.3.33 HF EQ “Q” Control
3.3.35 HMF EQ Pot Null LEDs
3.3.36 MF2 EQ “Q” Control
3.3.38 LMF EQ Pot Null LEDs
3.3.39 MF1 EQ “Q” Control
3.3.41 LF EQ Pot Null LEDs
3.3.42 LF EQ “Q” Control
3.3.44 EQ In/Out
3.3.45 LP Filter In/Out
3.3.46 HP Filter In/Out
3.3.47 EQ and Filters Pre and Post Insert
3.3.52 Insert in/Out
3.3.53 All Module Isolate
3.3.55 Potentiometer “Reset” Warning
:;63#'XDO#,QSXW#&KDQQHO
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