Operator`s manual

Model VR240 Audio Logging Recorder
January 2000
4-9
The VR240 can be controlled from the front panel or it can be operated remotely via RS-
232/RS-485. Several connectors on the rear panel provide access to various functions
including remote control, time code input/output, and outputs to a label printer and status printer.
Figure 4-1. VR240 General Block Diagram
4-16. CONCLUSION.
This chapter has attempted to explain the philosophy behind the VR240 digital logger. We hope
that by knowing how the unit works you will not be surprised when the operation is not quite the
same as an analog machine, and we hope you will come to appreciate the benefits of digital
logging.
INPUT BOARD 1
Input Gain Adjust, VOX, AGC
Analog-to-Digital Converter
ADPCM Data Reduction
INPUT BOARD 2
INPUT BOARD 3
CPU BOARD
ROM, RAM, Real-Time Clock
RS232, RS485 Serial Ports
SCSI, Ethernet, GPS
DISPLAY
4-Lines, 40 Characters
KEYBOARD, LEDs
I/O CONTROL BOARD
Audio Output Level Control
ADC for Audio Level Metering
Keyboard & Display Control
POWER SUPPLY
Switcher for +5V, +12V, -12V
Uninterruptible Switch to Battery
AC Fail Detect, Battery & Charger
UPPER DRIVE
Tape, Optical Disk, DVD-RAM
LOWER DRIVER
Tape, Optical Disk, DVD-RAM
HARD DISK
SCSI BUS