QM1014 LO Synthesizer Distribution Unit
User Manual
1. Introduction
1.1 USB Configuration
The Quonset Microwave QM1014 LO Synthesizer Distribution Unit has been designed to configure as a
USBTMC or TCPIP device. No additional drivers are required.
The QM1014 has been designed to be VISA and SCPI compliant and as such, all you need in order to
communicate with the LO Synthesizer Distribution Unit is a VISA library installed on your machine. The
QM1014 has been designed using the NI-VISA Runtime Engine, which is included with the GUI.
1.2 Command Syntax
In this manual, the following command syntax conventions are used:
∙
Square brackets ([ ]) indicate multiple keywords, one of which must be used
∙
Bars(
|
) can be read as "or" and are used to separate parameter options.
1.2.1 Mnemonic Forms
Each keyword has both a long and short form. A standard notation is used to differentiate the short form
and long form keyword. The long form of the keyword is shown, with the short form of the keyword shown
in uppercase letters and the rest of the keyword is shown in lowercase letters. For example, the short
form of
FREQuency
is
FREQ
.
1.2.2 Using a Semicolon(;)
Use a semicolon to separate two commands within the same command string.
1.2.3 Using Whitespace
You
must
use whitespace characters, [tab], or [space] to separate a parameter from a keyword.
1.2.4 Using "?" Commands
The bus controller may send commands at any time, but a SCPI instrument may only send a response
when specifically instructed to do so. Only commands that end with a "?", henceforth referred to as
queries, instruct the instrument to send a response message. Queries can return either measured val-
ues, instrument settings, or internal status codes.
Note:
If you send multiple queries without reading the response between queries, only the result of the
last query will be returned when the response is read. The query buffer is a first-in first-out configuration.
1.2.5 Using "*" Commands
Commands starting with a "*" are called common commands. They are required to perform identical
functions for all instruments that are compliant with the IEEE-488.2 interface standard. The "*" commands
are used to control reset, self-test, and status operations in the LO Synthesizer Distribution Unit.
1.3 Diagram Syntax Conventions
∙
Solid lines represent the recommended path
∙
Ovals enclose command mnemonics. The command mnemonic must be entered exactly as shown
in the oval.
∙
Dotted lines indicate an optional path for passing secondary or optional keywords.
∙
Arrows and curved intersections indicate command path direction.
Quonset Microwave
Revision 1.2.1
12
