txkvcotest.py

重复测试芯片VCO输出的程序

# Utilities for TX VCO calibration testing
# $Id: txKvcoTest.py,v 1.1 2007/03/14 01:02:02 lettieri Exp $

from util import *
import epProcs

ep = epProcs.EpProcs()

#
# Run TX KVCO n times, report stats
#
def runTxKvcoVarTest(chan,padr=0x7f,n=10):
    ''' Run continuous tone N times at one channel and power,
        and report back statistics about the calculated delta V
        from tx kvco cal, and the cap settings from open loop cal
        as a tuple in the form

            (mean(dv), sigmaPct(dv), mean(caps), sigmaPct(caps))

        where sigmaPct() is the std dev of the data as a percentage of
        the average.
    '''
    dv = []
    caps = []
    for i in range(n):
        ep.continuousTone(chan,padr)
        dv.append(1000*ep.getTxDeltaV())
        caps.append(ep.getTxCaps())

    if ep.verbose:
        print dv
        print caps

    avgDv = mean(dv)
    normDv = 100*stddev(dv) / avgDv
    avgCaps = mean(caps)
    normCaps = 100*stddev(caps) / avgCaps

    if ep.verbose:
        print "Average delta V (mV) = %f" % avgDv
        print "Normalized 1-sigma deltaV = %f%%" % normDv
        print "Average caps = %f" % avgCaps
        print "Normalized 1-sigma caps = %f%%" % normCaps

    return (avgDv,normDv,avgCaps,normCaps)


#
# Run TX KVCO n times for each channel, report stats to file
#
def runTxKvcoVarTestAllChan(n=10,fname='dvTest.txt',padr=0x7f):
    '''Run runTxKvcoVarTest() N times at each channel, and send the
        reported statistics to file.
    '''
    fp = open(fname,"w")
    fp.write("Idx\tFreq\tdv sig\tdv err\tcap avg\tcap sig\n")
    for i in range(971):
        print "Running channel %d:%.1f" % (i,float(ep.getChanFreq(i)))
        val = runTxKvcoVarTest(ep.getChanFreq(i),padr,n)
        fp.write("%d\t%.1f\t%.2f\t%.4f\t%.2f\t%.4f\n" % ((i,float(ep.getChanFreq(i)))+val))
    fp.close()