8-21
Processing Components - Crossover
depending upon whether 12 dB/octave or 24 dB/octave filters are
used, respectively.
The following sections will show this sum-to-allpass trait to hold true
for the ISP-100 Linkwitz-Riley 3-way and 4-way crossover
implementations.
Three-way
From Figure 8-6
Summed Response = LP
1
LP
2
± HP
1
LP
2
±
θ
1
HP
2
= (LP
1
± HP
1
)LP
2
±
θ
1
HP
2
=
θ
1
LP
2
±
θ
1
HP
2
=
θ
1
(LP
2
± HP
2
)
=
θ
1
θ
2
Q.E.D.
There is an alternate configuration, not implemented in the ISP-
100, that also has this property:
Summed Response = LP
1
θ
2
± HP
1
LP
2
± HP
1
HP
2
= LP
1
θ
2
± HP
1
(LP
2
± HP
2
)
= LP
1
θ
2
± HP
1
θ
2
= (LP
1
± HP
1
)
θ
2
=
θ
1
θ
2
Q.E.D.
Four-way
From Figure 8-9
Summed Response = LP
1
LP
2
θ
3
± HP
1
LP
2
θ
3
±
θ
1
HP
2
LP
3
±
θ
1
HP
2
HP
3
= (LP
1
± HP
1
)LP
2
θ
3
±
θ
1
HP
2
(LP
3
± HP
3
)
=
θ
1
LP
2
θ
3
±
θ
1
HP
2
θ
3
=
θ
1
(LP
2
± HP
2
)
θ
3
=
θ
1
θ
2
θ
3
Q.E.D.
Low, Low-Mid, Mid, Mid-High and High Controls
The Low, Low-Mid, Mid, Mid-High and High buttons determine if
that section of the crossover is bypassed. If the word Low, Low-Mid,
Mid, Mid-High or High is displayed on the button, then that portion of
the crossover is not bypassed. If the word Bypassed is displayed on
the button’s face, then that portion of the crossover is bypassed.
Clicking on the buttons will toggle their settings.
Link/Unlink Control
The Link/Unlink button determines if the settings in the crossover
track their corresponding partners. A simple rule of thumb is that
when the sections are linked, the component on the right will track its
partner on the left. Clicking on the button(s) will toggle the settings.
Slope
To change settings, click on the arrow next to the number in the text
box. A selection list will appear. The list may or may not be
scrollable. To make a selection click on the desired entry.
Summary of Contents for Integrated Signal Processor ISP-100
Page 1: ...User s Manual ISP 100 INTEGRATED SIGNAL PROCESSOR...
Page 2: ...THIS PAGE LEFT BLANK INTENTIONALLY...
Page 24: ...2 10 10 July 1998 THIS PAGE LEFT BLANK INTENTIONALLY...
Page 32: ...3 8 10 July 1998 THIS PAGE LEFT BLANK INTENTIONALLY...
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Page 126: ...A 4 10 July 1998 THIS PAGE LEFT BLANK INTENTIONALLY...
Page 128: ...B 2 10 July 1998 MONDOEQ QMS...
Page 129: ...B 3 Standard QuickMAPs 2X6CMBC QMS...
Page 130: ...B 4 10 July 1998 2X8COMB QMS...
Page 131: ...B 5 Standard QuickMAPs 3X6CMBC QMS...
Page 132: ...B 6 10 July 1998 2X8THRU QMS...
Page 133: ...B 7 Standard QuickMAPs 4CHAN QMS...
Page 134: ...B 8 10 July 1998 4X6CMBC QMS...
Page 135: ...B 9 Standard QuickMAPs 4X6THRU QMS...
Page 136: ...B 10 10 July 1998 3_2W QMS...
Page 137: ...B 11 Standard QuickMAPs 2WAYS QMS...
Page 138: ...B 12 10 July 1998 2_3WAY QMS...
Page 139: ...B 13 Standard QuickMAPs 2_2W_SUB QMS...
Page 140: ...B 14 10 July 1998 2_2W_FR QMS...
Page 141: ...B 15 Standard QuickMAPs 2_2W_2ST QMS...
Page 142: ...B 16 10 July 1998 4_2WAYS QMS...
Page 143: ...B 17 Standard QuickMAPs 4W_2FR QMS...
Page 144: ...B 18 10 July 1998 LCR QMS...
Page 145: ...B 19 Standard QuickMAPs MONO3W QMS...
