Rion NA-28 User manual

3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
http://www.rion.co.jp/english/
SERIAL INTERFACE MANUAL
Sound Level Meter
NA-28

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, inuence
of extension cables and windscreen on the measurement, and other
topics.

ii

iii
Organization of This Manual
This manual describes the features of the serial interface built into the Sound
Level Meter NA-28.
The manual contains the following three sections.
Chapter 1 Preparations for USB Communication
Describes how to connect the unit to a computer via a USB link and how
to install the USB driver. The chapter also contains general information
about usage.
Chapter 2 Basic Syntax
Explains USB related syntax and other items.
Chapter 3 Command Reference
Describes the commands for controlling the NA-28, including command
format, functions, and other aspects.
* All company names and product names mentioned in this manual are
trademarks or registered trademarks of their respective owners.

iv
Contents
Organization of the NA-28 Documentation ..................................... i
Organization of This Manual ........................................................ iii
Chapter 1 Preparations for USB Communication .......................1
About USB Functionality ...............................................................2
Connection to a Computer ..............................................................3
Operating Environment...................................................................4
Installing the USB Driver................................................................5
Installation procedure ...............................................................5
Connection to the computer ....................................................10
Disconnection from the computer ...........................................11
Checking the virtual COM port ..............................................12
Chapter 2 Basic Syntax ............................................................15
Outline .........................................................................................16
Local Mode/Remote Mode ..........................................................17
Transfer Codes ..............................................................................18
Transfer Format.............................................................................19
ID: ID Number .......................................................................20
ATTR: Block Attribute ...........................................................21
Block Reception Processing ..........................................................22
Command Types .....................................................................22
Error Processing .....................................................................23
Transfer Types ........................................................................24
Communication Cutoff..................................................................29
Power Save Mode ...................................................................29
Power Off ...............................................................................29
Auto Shutdown .......................................................................29
Rated Values .................................................................................30

v
Chapter 3 Command Reference ............................................... 31
Commands ...................................................................................32
Command List ........................................................................32
Command Format ...................................................................38
Error Codes ............................................................................39
Parameters ..............................................................................39
Command Send Example ........................................................40
Command Description ............................................................ 41
Examples for Control Via External Commands ......................86

vi

1
Contents
About USB Functionality ................................................................2
Connection to a Computer...............................................................3
Operating Environment...................................................................4
Installing the USB Driver................................................................5
Installation procedure ................................................................5
Connection to the computer .....................................................10
Disconnection from the computer ............................................ 11
Checking the virtual COM port ...............................................12
Chapter 1
Preparations for USB Communication

2
About USB Functionality
The NA-28 supports operation control and data transfer via a USB connection. Con-
nection of multiple units is not supported.