Audible Noise on Air........................................................................................................ 5-2
Whistle on Air, Perhaps Only in Stereo Reception ......................................................... 5-3
Interference from stereo into SCA .................................................................................. 5-4
Fig. 5-1: Typical 8300 baseband spectrum with heavy processing, 0-100 kHz. ............. 5-4
Shrill, Harsh Sound ........................................................................................................... 5-4
Dull Sound ........................................................................................................................ 5-5
System Will Not Pass Line-Up Tones at 100% Modulation ............................................ 5-5
System Will Not Pass Emergency Alert System (“EAS” USA Standard) Tones at the
Legally Required Modulation Level ................................................................................ 5-5
System Receiving 8300’s Digital Output Will Not Lock .................................................. 5-5
19 kHz Frequency Out-of-Tolerance................................................................................ 5-5
L–R (Stereo Difference Channel) Will Not Null With Monophonic Input...................... 5-6
General Dissatisfaction with Subjective Sound Quality.................................................. 5-6
Security Passcode Lost (When Unit is Locked Out) ......................................................... 5-6
Connection Issues between the 8300 and a PC, Modem, or Network ................5-6
Troubleshooting Connections.................................................................................5-7
You Cannot Access the Internet After Making a Direct or Modem Connection to
the 8300: ..................................................................................................................5-7
OS-SPECIFIC TROUBLESHOOTING ADVICE ............................................................................5-8
Troubleshooting Windows 2000 Direct Connect:..................................................5-8
Troubleshooting Windows 2000 Modem Connect:.............................................5-10
Troubleshooting Windows XP Direct Connect: ...................................................5-11
Troubleshooting Windows XP Modem Connect: ................................................5-11
TROUBLESHOOTING IC OPAMPS .......................................................................................5-12
TECHNICAL SUPPORT.......................................................................................................5-13
FACTORY SERVICE...........................................................................................................5-13
SHIPPING INSTRUCTIONS ..................................................................................................5-14
Section 6 Technical Data
.........................................................................................................................................6-1
SPECIFICATIONS ................................................................................................................6-1
Performance.............................................................................................................6-1
Installation ...............................................................................................................6-2
CIRCUIT DESCRIPTION .......................................................................................................6-5
Overview ..................................................................................................................6-5
Control Circuits ........................................................................................................6-6
User Control Interface and LCD Display Circuits ...................................................6-7
Input Circuits............................................................................................................6-8
Output Circuits.........................................................................................................6-9
DSP Circuit..............................................................................................................6-12
Power Supply .........................................................................................................6-12
ABBREVIATIONS .............................................................................................................6-13
PARTS LIST ....................................................................................................................6-14
Obtaining Spare Parts ...........................................................................................6-15
Base Board .............................................................................................................6-15
CPU Module ...........................................................................................................6-17
RS-232 Board..........................................................................................................6-18
Power Supply .........................................................................................................6-19
Input/Output (I/O) Board ......................................................................................6-20
DSP Board...............................................................................................................6-23
Display Board.........................................................................................................6-25
SCHEMATICS AND PARTS LOCATOR DRAWINGS...................................................................6-25
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