Dolby Laboratories DA20, Руководство по установке

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Cat. No. 560 settings
The Cat. No.560 has six programming jumpers and one switch on it:
• J1 selects high or low output level range for the CP50 Right surround output.
• J2 selects high or low output level range for the subwoofer channel.
• J3 selects the surround logic mode. Set to the CP200 position.
• J4 selects either a 50 or 100 Hz low-pass filter for the subwoofer when in analog optical formats.
The 50 Hz setting is intended for use with JBL, E-V or other modern screen loudspeakers
having good response and power handling down to that frequency. By using this filter
position, overlap between subwoofer and screen speakers is avoided. The 100 Hz setting is
intended for use with Altec A-series and other older screen speakers lacking in power handling
ability at low frequencies. In these cases, the screen speaker equalization should not have boost
applied below 100 Hz so as to avoid a peak in the system frequency response caused by
overlapping outputs from the subwoofer and screen speaker.
• J5 selects either a 100 or 180 Hz low pass filter for the subwoofer in magnetic sound formats.
The 180 Hz position is intended for installations with no Le or Re speakers, where the
subwoofer carries all bass track information. The 100 Hz position is intended for installations
using the Le and Re speakers to carry the bass track information in conjunction with a
subwoofer. The Le and Re screen speakers are rolled off below 100 Hz by the Cat. No.142. The
subwoofer provides the mid- and low-bass information.
•
J6
disables the CP200 subwoofer output in CP50 installations.
•
S1
enables or disables the subwoofer. The lower position corresponds to the OFF setting on
Cat. No.160 and the upper setting to the AUTO setting.
The Cat. No.560 provides a single band parametric equalizer and variable turnover bass
and treble controls for P and Q surround channels and a single band parametric equalizer
for the subwoofer. The equalizer control functions and locations of the Cat. No.560 are
similar to those on the Cat. No.441 card used in the CP65.
S1
J2
J1
J3
J6
CAT. NO. 560
HI
LO
CP200
CP50
SW
MODE
MAG SW LPF
180
HZ
100
HZ
J5
SURR MODE
CP200 CP50
OPT SW LPF
J4
100 HZ 50 HZ
SW
GAIN
RANGE
AUTO
OFF
SUB
ENABLE
RS GAIN RANGE
HI LO
Figure 2.13 Cat. No.560 Jumper Settings