Agilent Technologies Signal Analyzer N9030a - Manual (Page 437)

5 Legacy Command Descriptions
PWRBW (Power Bandwidth)
SCPI Equivalent Commands None
Notes If the percent total power is 100%, the power bandwidth equals the frequency span.
On the 8566A/B analyzer, this command stops the trace. That is not the case for N9061A.
Remote Language Compatibility Measurement Application Reference 437