Keysight P9241, Руководство программиста SCPI

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Status Reporting
35
Keysight P9241/42/43A Oscilloscopes SCPI Programmer's Guide 1167
Example: Checking for Armed Status
# -*- coding: utf-8 -*-
# ********************************************************************
# This script using the Python language (http://www.python.org/) and
# the PyVISA package (http://pyvisa.readthedocs.org/) shows three
# methods to tell whether a Keysight InfiniiVision oscilloscope is
# armed.
# ********************************************************************
# Import modules
# --------------------------------------------------------------------
import sys
import visa
import time
# Initialization constants
# --------------------------------------------------------------------
# Get VISA address from Keysight IO Libraries Connection Expert
VISA_ADDRESS = \
"TCPIP0::a-mx4154a-60014.cos.is.keysight.com::inst0::INSTR"
GLOBAL_TOUT = 20000 # IO timeout in milliseconds
# ====================================================================
# Method 1: Query the Armed Event Register with :AER?
# --------------------------------------------------------------------
# This method reads the 1-bit Armed Event Register using the :AER?
# query.
#
# The Armed Event Register bit goes low (0) when it is read using
# :AER? or when a *CLS command is issued.
# ====================================================================
def method_1():
# Stop the oscilloscope.
KsInfiniiVisionX.query(":STOP;*OPC?")
# Method 1: Initiate capture using :SINGle
# ----------------------------------------------------------------
print "Acquiring signal (Method 1, using :SINGle)...\n"
now = time.clock()
# Clear all status registers before checking for new events.
KsInfiniiVisionX.write("*CLS")
# Because the :AER? query will not work with :DIGitize (which is
# blocking), use the :SINGle command to start the acquisition.
KsInfiniiVisionX.write(":SINGle")
# Method 1: Determine if armed using :AER? query.
# ----------------------------------------------------------------
# Define armed criteria.
ARMED = 1