au.representativeFrequencyFromASDM(asdm, verbose=True)
CASA <3>: au.representativeFrequencyFromASDM('uid___A002_Xa424cc_X3ee') minAcceptableResolution = 0.649003 arcsec" maxAcceptableResolution = 0.793225 arcsec" Out[3]: 282.45000000000005