Handling Instructions - Digital Voice Systems VC-20-MR2 User Manual

D V S
IGITAL OICE YSTEMS,
The Speech Compression Specialists
Note that for proper operation any background noise present in the speech must be
short term stationary and have a level less than -25 dBm0.
The RATE signal controls which version the VC-20-MR2 voice codec runs.
Holding the RATE high selects the 4.8kbs. system , holding it low selects the 2.4kps.
system.
2.3 Special Handling and Storage Precautions

Handling Instructions

Although the VC-20 AMBE™ Vocoder Board incorporates input protection
circuitry, to avoid damage from the accumulation of a static charge, industry
standard electrostatic discharge precautions and procedures must be employed
during handling and installing.
Storage
To insure maximum shelf life in long term storage, VC-20 AMBE™ Vocoder
Board should be kept in a moisture controlled package at <40 C and <90% RH.
VC-20 AMBE™ Vocoder Board User's Manual
I
NC.
Section 2 – VC-20 AMBE™ Vocoder Board Overview
CAUTION
page 7