Operator`s manual

Chapter Page
Section III. SYSTEM INFORMATION 3-22
3-23 SYSTEM INFORMATION 3-22
3-24 MEDIA INFORMATION 3-23
3-25 DISK INFORMATION 3-25
Section IV. BOARD/CHANNEL CONFIGURATION 3-26
3-26 BOARD/CHANNEL CONFIGURATION 3-26
3-27 RECORD ENABLE (RecEnable) 3-26
3-27.1 Telephone Board - RecEnable Modes 3-27
3-27.2 Audio Board - RecEnable Modes 3-27
3-28 VOX (Voice Activated) 3-28
3-28.1 Setting the VOX Hold Time 3-28
3-28.2 Setting the VOX Level 3-28
3-29 AUDIO GAIN 3-30
3-30 BEEP 3-31
3-31 OFF HOOK 3-31
3-32 AUTOMATIC GAIN CONTROL (AGC) 3-32
Section V. DESCRIPTORS 3-34
3-33 FUNCTIONAL DESCRIPTION 3-34
3-34 COPY DESCRIPTORS 3-36
4 THEORY OF OPERATION 4-1
Section I. PHILOSOPHY OF OPERATION 4-1
4-1 GENERAL 4-1
4-2 COMPROMISES IN LOGGING RECORDERS 4-1
4-3 ANALOG vs. DIGITAL RECORDING 4-1
4-4 AUDIO QUALITY CONSIDERATIONS AND TRADEOFFS 4-2
4-5 FREQUENCY RESPONSE 4-2
4-6 SAMPLING RATE IN THE VR240 4-3
4-7 DYNAMIC RANGE, SNR, AND THD+N 4-3
4-8 WOW AND FLUTTER 4-4
4-9 CROSSTALK 4-4
4-10 DEGRADATION 4-4
4-11 TAPE USAGE 4-5
Section II. THE VR240 CHANNEL HOUR CAPACITY 4-6
4-12 THE "CHANNEL HOUR" 4-6
4-13 HARD DISK DRIVE 4-7
Section III. VR240 THEORY OF OPERATION 4-9
4-14 MAIN COMPONENTS 4-9