4-6
MAINTENANCE
ORBAN MODEL 8300
c)
Reconnect the three-wire cable at the back of the encoder.
14.
Replacing the Top Cover:
A)
Place top on unit and reattach the eighteen Phillips screws. (Be careful not to
pinch any cables.)
Field Audit of Performance
Required Equipment:
Ultra-low distortion sine-wave oscillator / THD analyzer / audio voltmeter
With verified residual distortion below 0.01%. Sound Technology 1710B;
Audio Precision System One, or similar high-performance system.
The
NAB Broadcast and Audio System Test CD
is an excellent source of
test signals when used with a high-quality CD player.
Spectrum analyzer with tracking generator
Stanford Research Systems SR760 or equivalent. Alternatively, a sweep
generator with 50-15,000 Hz logarithmic sweep can be used with an os-
cilloscope in X/Y mode, or you can use a computer-controlled test set like
the Audio Precision System One.
Digital voltmeter
Accurate to ±0.1%.
Oscilloscope
DC-coupled, triggered sweep, with 5 MHz or greater vertical bandwidth.
Two 620
±5% resistors.
Optional: Audio Precision System 1 (without digital option) or System 2 (for digi-
tal tests).
It is assumed that the technician is thoroughly familiar with the operation of this
equipment.
This procedure is useful for detecting and diagnosing problems with the 8300's per-
formance. It includes checks of frequency response, noise and distortion perform-
ance, and output level capability.
This performance audit assesses the performance of the analog-to-digital and digi-
tal-to-analog converters and verifies that the digital signal processing section (DSP)
is passing signal correctly. Ordinarily, there is a high probability that the DSP is per-
forming the dynamic signal processing correctly. There is therefore no need to meas-
ure such things as attack and release times — these are defined by software and will
automatically be correct if the DSP is otherwise operating normally.
Summary of Contents for 8300J
Page 1: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
Page 7: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
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Page 247: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 29...
Page 254: ...6 36 TECHNICAL DATA ORBAN MODEL 8300 CPU Module...
Page 260: ...6 42 TECHNICAL DATA ORBAN MODEL 8300 8300 RS232 BOARD PARTS LOCATOR...
Page 262: ...6 44 TECHNICAL DATA ORBAN MODEL 8300 8300 POWER SUPPLY PARTS LOCATOR...
Page 264: ...6 46 TECHNICAL DATA ORBAN MODEL 8300 8300 I O BOARD PARTS LOCATOR...
Page 270: ...6 52 TECHNICAL DATA ORBAN MODEL 8300 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 278: ...6 60 TECHNICAL DATA ORBAN MODEL 8300 8300 DISPLAY BOARD PARTS LOCATOR...
Page 279: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...