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IN-SYSTEM
PERFORMANCE
VERIFICATION
APPENDIX
C:
USER ACCESS
6-1
Mono
Performance
Verification
6-2
Stereo
Performance
Verification
Bl
ROUTINE
MAINTENANCE
7-1
General
7-1
Routine
Performance
Verification
APPENDIX
A:
SYSTEM
DESCRIPTION
A-l
Comparison
With
OPTIMOD-TV
Model 8180A
A-2
Input
Amplifier
A-2
30Hz
Highpass
Filter
A-3
Allpass
Phase Scrambler
And
Pree
mp
hasis
/Deemp
ha
sis
A-3
Dual-Band "Master/Bass" Compressor
A-3
Crossover
And
Bass Clipper
A-4
Voltage-Controlled Amplifier Operation
A-4
Compressor
Control
Circuitry
A-6
Phase-Corrected Lowpass
Filter/Preemphasis
A-6
High Frequency Limiter
A-7
Peak
Limiting
System
A-8
Clipper With
Dynamic
Threshold
A-8
Hilbert
-Transform
Clipper
A-
9
15kHz
Phase-Corrected Bandpass
Filter
A-9
Frequency -Contoured
Sidechain
Overshoot
Compensator
A-10 Balanced
Line
Amplfier
and
Deemphasis
A-10
Power
Supplies
A-ll Loudness
Controller
APPENDIX
B:
CIRCUIT DESCRIPTION
B-l
Input
Amplifier
B-l
30Hz
Highpass
Filter
B-2
Allpass
Phase Scrambler
And
Preemphasis
/Deemp
hasis
B-2
Dual-Band "Master/Bass" Compressor
B-2
Crossover
And
Bass Clipper
B-2
Voltage-Controlled Amplifier Operation
B-3
Compressor
Control Circuitry
B-5
Gain Reduction Metering
B-6
Gating
Circuitry
B-6
Phase-Corrected Lowpass
Filter/Preemphasis
B-7
Differential
Preemphasis
And
High Frequency
Limiter
B-7
High Frequency
Limiter Control
Circuitry
B-8
Peak
Limiting
System
B-8
Clipper With [Dynamic Threshold
B-9
Hilbert
-Transform
Clipper
B-ll
15kHz Phase-Corrected
Bandpass
Filter
B-12 Frequency -Contoured
Sidechain
Overshoot
Compensator
B-12 Balanced
Line Amplfier With
Deemphasis
B-13 Unregulated
Power
Sipply
B-13 +15
Volt Regulator
B-14
-15 Volt
Regulator
B-14
Miscellaneous Voltage
Supplies
B-14 Loudness
Controller
C-l
Routine Access
C-l
User Adjustments
C-l
Line
Fuse,
Power
Switch, and Line
Voltage
Selector
C-l
Circuit
Cards
C-l
Service
Access
C-l
General Cautions
C-2
Cover
Removal
C-2
Access To
Area
Behind
Rear
Panel
C-2
Access
To
Input Filter
Card
C-2
Access
To
Unregulated
Power
Sipply
Chamber
C-3
Removal Of Card
//PS
(The
DC
Regulator)
From
Rear Panel
And Power
Transistor
Replacement
Q
APPENDIX
D:
FIELD AUDIT -OF-PERF
OR MANCE
PROCEDURE
D-l
General
D-l
Required
Equipment
D-l
Audio
Processing
D-2
Standard Control Setup
D-2
Skeleton
Proof
D-3
Operate-Mode Measurements
D-4
Loudness
Controller
FIELD
ALIGNMENT
PROCEDURE
E-l
General
E-l
Required Test
Equipment
And
Materials
E-2
Card
#PS
(Power
Supply)
E-2
Cards #3/
#4
(Input
Buffer/Input Conditioning
Filter/
Compressor Audio
Path)
E-4
Card
//5
(Compressor Control/Gating Detector)
E-4
Card #6 (Preemphasis/HF
Limiter)
E-5
Fig.
E-ls
Deemphasis Network
E-5
Fig.
E-2:
Overall
Deemphasized Response
E-6
Cards
//0
And
ftl
E-7
Cards #8/#9
E-7
Fig.
E-3:
2.2-15kHz
Bandpass
Filter
Response
E-8
Fig.
E-4:
4.4kHz Overdriven
FCS
Output
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