Rion NA-28, Manual, Page: 3 / 98

i
Organization of the NA-28 Documentation
The documentation for the Sound Level Meter NA-28 consists of three sepa-
rate manuals.
• Instruction Manual
Describes operating procedures for the Sound Level Meter NA-28,
connection and use of peripheral equipment such as a level recorder
and printer, and use of the memory card.
• Serial Interface Manual (this document)
Describes communication with a computer, using the serial interface
built into the Sound Level Meter NA-28. The manual covers the com-
munication protocol, use of control commands for the sound level meter,
format of data output by the sound level meter, and other topics.
• Technical Notes
This document provides in-depth information about sound level meter
performance, microphone construction and characteristics, infl uence
of extension cables and windscreen on the measurement, and other
topics.