Keysight 34959A, Руководство пользователя

Страница: 28 / 39

28 Keysight 34959A User’s Guide
Programming the 34959A Breadboard Module
The 34959A Breadboard Module has three methods of signal input/output
between the 34980A mainframe and the user-designed circuitry. The first is to
access the four Analog Buses. The second provides control for up to 32 general
purpose relays you may install on your PC board (only 28 general purpose relays if
the four Analog Bus relay control lines will be used). The third provides two bytes
of simple digital I/O with handshake signals.
Analog Bus Relay Functions
The 34980A mainframe provides four two-wire internal Analog Buses for signal
routing. The channels for the four Analog Buses are numbered 911 through 914. If
any of the optional Analog Bus relays K101 through K104 are installed on the
34959A, you can route external signals to the Analog Buses or access signals
introduced to those buses through other installed modules. Refer to Chapter 2 for
configuring the internal DMM for making voltage, resistance, or frequency
measurements.
The Keysight 34980A Programmer’s Reference details the SCPI language and
syntax for all commands available through the remote interface. Examples of
some commands you will use to control relays to the analog bus, query relay
status or assign custom labels to these channels are described below:
The
ROUTe:OPEN
command is used to open a relay. The syntax is:
ROUTe:OPEN (@<ch_list>)
Example: If the Breadboard Module is in slot 1, the following command opens
relay K101 to Analog Bus 1 (channel 911):
ROUTe:OPEN (@1911)
The
ROUTe:OPEN?
command is used to query the status of a relay. The syntax is:
ROUTe:OPEN? (@<ch_list>)
NOTE
The internal DMM uses Analog Bus 1 for voltage, 2-wire resistance, and
frequency measurements. For 4-wire resistance measurements, the internal
DMM uses both Analog Bus 1 and Analog Bus 2.