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Table of Contents

Digital Signal Processing

………………………………

Overview

……………………………………………………

System Description

……………………………………...

Card Cage ……………………………………………..

Control Module ……………………………………...

DSP Modules

……………………………………...

Power Supply Modules ……………………………….

Cable Connections & Jumper Configurations

…………...

Connectors ……………………………………………..

DSP Module Jumper Configuration ………………….

Mode …………………………………………..

Squelch ………………………………………..

Nominal Input Level

………………………...

Control Module Configuration ………….….……….

Jumper Configuration …………...………….….

Cabling ………………………………………..

Terminal Configuration …………...………….….

Troubleshooting & Checkout

…………………………….....

DSP Modules …………………………………………..

Test Procedure - DSP Modules ……………………...

Power Supply…………………………………………..

Test Procedure - Power Supply ……………………...

Product Warranty

………………………………………….....

Appendix A

……………………………………………………

Typical FAA Installation ………………………………

Содержание DSP-8200d

Страница 1: ...Danville Signal Processing Inc DSP 8200d Tone Suppression Noise Reduction System Operating Manual Version 2 1 ...

Страница 2: ...customers As part of this goal we are constantly trying to improve our products Danville Signal Processing Inc therefore reserves the right to make changes to product specification or documentation without prior notice This manual may contain errors omissions or typos Please send your comments suggestions and corrections to Danville Signal Processing Inc 38570 100th Avenue Cannon Falls MN 55009 55...

Страница 3: ...Configurations 8 Connectors 8 DSP Module Jumper Configuration 8 Mode 8 Squelch 9 Nominal Input Level 9 Control Module Configuration 10 Jumper Configuration 10 Cabling 10 Terminal Configuration 10 Troubleshooting Checkout 11 DSP Modules 11 Test Procedure DSP Modules 11 Power Supply 12 Test Procedure Power Supply 12 Product Warranty 13 Appendix A 14 Typical FAA Installation 14 ...

Страница 4: ...ew This manual describes the DSP 8200d tone suppression and noise reduction system The DSP 8200d removes heterodynes tones caused during multiple aircraft to aircraft and multiple aircraft to controller communications It also attenuates unwanted signaling tones that may be inadvertently applied to normal monitoring channels This tone reduc tion wipes out potential hearing impairing test and interf...

Страница 5: ...ation characteristics of the noise Typical noise reduction ranges from 5 dB to 20 dB for random noise and up to 50 dB for tones A squelch feature is also implemented in each mode The DSP 8200d squelches silent channels no communication in progress so that channel noise is very low This feature is particularly important when multiple channels are being monitored by the same controller Should the ne...

Страница 6: ...included in all Windows Operating Systems since Windows 95 is HyperTerminal To access the Control Module using HyperTerminal hook up the terminal program and hit the Esc key To access a list of commands available press the key While many of the commands are specific to programming and updating two commands will be useful for system status and diagnostic purposes They include A Command reports jump...

Страница 7: ...eration Each power supply module is fully capable of supplying all of the necessary power to operate all the modules If one of the power supply modules fail the card cage will continue to operate Each power supply module is supplied with a 5x20mm DIN 1A fuse The power supply modules can be configured for either 115V or 230V operation Individual IEC320 connectors and matching cordsets are provided ...

Страница 8: ...y be used DSP Module Jumper Configuration JH1 Mode Jumper 3 2 1 Tone Reduction Off Off Off Noise Reduction Off Off On Bandpass Only Off On Off Reserved Off On On Reserved On Off Off Ground Ground tones Narrow BW On Off On Ground Ground tones Wide BW On On Off Bypass On On On Notes 300 3400 Hz Bandpass in all Modes except Bypass WARNING DO NOT USE TONE REDUCTION FOR GUARD FREQUENCIES 121 5 MHz AND ...

Страница 9: ... 5 dBm On Off On On 14 0 dBm On On Off Off 15 5 dBm On On Off On 17 0 dBm On On On Off 18 5 dBm On On On On Notes Factory Default is 8 0 dBm setting Changes take effect only after Power on Reset The nominal input level adjustment is used to optimize the performance of the signal processing algorithms and to maximize signal to noise without overload Input output gain is constant for all settings Th...

Страница 10: ...on The factory default position is NC closed during normal operation and open during a failure Control Module Cables The Control Module may be connected to a computer using either a RS 232 connec tion or a USB connection A standard DB9F to DB9M cable with no twists is used for the RS 232 connection A standard USB cable with a B connector on the Control Module side is used for a USB connection Cons...

Страница 11: ...all signal processing functions are performed exclusively by mathematical calculation a DSP 8200d module that passes this test will also operate correctly in the other operating modes WARNING THIS PROCEDURE SHOULD NEVER BE PERFORMED IN AN OPERATING COMMUNICATION CHANNEL IT IS INTENDED FOR OUT OF CIRCUIT TESTING ONLY TEST TONES WILL PASS THROUGH THE DSP MODULE IN THIS TEST Test Procedure DSP Module...

Страница 12: ...the signal is being bypassed by the relay An open transistor or defective relay could cause this symptom 7 If the DSP module passes these tests reconfigure the mode to the desired operating configuration Power Supply Modules Each power supply module consists of an unregulated linear supply and a low noise 5 3 volt switching regulator Diode rectifiers on the back plane of the card cage isolate each...

Страница 13: ... shall at its option either repair or replace software media or firmware which do not execute their programming instructions due to such defects Danville Signal Processing does not warrant that operation of the software firmware or hardware shall be uninterrupted or error free The warranty period for each product is one year from date of installation Limitation of Warranty The forgoing warranty sh...

Страница 14: ...raffic control and multiple airplanes Noise reduction is useful in applications where channel signal to noise is poor and may be used to enhance intelligibility and reduce listener fatigue The DSP 8200d is installed prior to controller switching equipment in the receive audio chain and does not require any FAA equipment modification Application sites may include FAA Control Centers Automatic Fligh...

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