ITech IT8200 Series Programming Guide

SCPI Introduction
Copyright © ITECH Electronic Co., Ltd. 5
response to a query command.
Sending a response message
After sending a query command, the response message is placed in the Output
Queue. When the instrument is then addressed to talk, the response message is
sent from the Output Queue to the computer
Multiple response messages
If you send more than one query command in the same program message, the
multiple response messages for all the queries is sent to the computer when the
instrument is addressed to talk. The responses are sent in the order that the
query commands were sent and are separated by semicolons (;). Items within the
same query are separated by commas (,). The following Example shows the
response message for a program message that contains four single item query
commands:
0; 1; 1; 0
Response message terminator (RMT)
Each response is terminated with an LF (line feed) and EOI (end or identify). The
following Example shows how a multiple response message is terminated:
0; 1; 1; 0; <RMT>
Message exchange protocol
Two rules summarize the message exchange protocol:
⚫ Rule 1: You must always tell the instrument what to send to the computer.
The following two steps must always be performed to send information from
the instrument other computer:
1. Send the appropriate query command(s) in a program message.
2. Address the instrument to talk.
⚫ Rule 2: The complete response message must be received by the computer
before another program message can be sent to the instrument.
1.5 Command Format
Formats for command display are as follows:
[SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM}
[SOURce[1|2]:]FREQuency:CENTer
{<frequency>|MINimum|MAXimum|DEFault}
Based on the command syntax, most commands (and certain Parameter) are
expressed in both upper and lower cases. Upper case refers to abbreviation of
commands. Shorter program line may send commands in abbreviated format.
Long-format commands may be sent to ensure better program readability.
For Example, both formats of VOLT and VOLTAGE are acceptable in the above
syntax statements. Upper or lower case may be used. Therefore, formats of
VOLTAGE, volt and Volt are all acceptable. Other formats (such as VOL and
VOLTAG) are invalid and will cause errors.
⚫ Parameter options with given command strings are included in the brace ({ }).
The brace is not sent along with command strings.

ITech IT8200 Series Specifications

General

Brand	ITech
Model	IT8200 Series
Category	Measuring Instruments
Language	English