Operator`s manual

Model VR240 Audio Logging Recorder
2-20
January 2000
2-8.3 Squelch Requirements.
A “high” is either an open circuit, or a voltage level greater than 4 volts. A “low” is either a
contact closure to ground or a voltage level lower than 2 volts.
2-8.4 Audio Board Front-End Options.
The following options are configurable from the front panel on a channel-by-channel basis:
1) Balanced input, >10K ohm impedance, transformerless
2) Transformer balanced input, >10K ohm impedance @ 1kHz
3) Transformer balanced input, 600 ohm impedance
Do not connect Audio Board channels directly to the Public
Switched Telephone Network. Use Eventide’s FCC-registered
input boards for this purpose.
2-8.5 Rear Panel Serial Port Connectors.
Connect the desired ancillary items (clock, label printer, status printer, etc.) to the rear panel
serial port connectors. Refer to Figure 2-5.