Hi,
I would stay away from the Agilent E7495, they start at 10 MHz and you might need to measure conducted emissions down to 150 kHz.
RBWAnalyzers used for EMC have RBW settings of 200 Hz, 9kHz and 120kHz. In addition to being different bandwidths, they have a different shape, than the normal 1-3-10 series filters. Not critical, but if you can get the right filters, why not.
QPSome EMC analyzers have the ability to measure quasi peak. The quasi peak measurement simulates the measurement that would be made with an analog meter. This is because originally EMC specs were written for an EMC receiver.
The QP detector only help if the EMC is in short bursts, a relatively long time between bursts.
The rise time on the QP detector is 1ms, so if your emissions are around 1ms or shorter, you benefit from the QP detector.
The fall time is 160ms, so if the time between the emissions is 100ms or greater you will benefit.
The QP detector has no benefit if the emissions are constant.
QP is always less than the peak, and greater than the average.
I rarely do QP measurements.
see:
https://www.eevblog.com/forum/testgear/rf-spectrum-analyzer-computing-quasi-peak/I believe that Rigol SDA815, has an option for the EMC features.
I use a HP8595E (6.5 GHz) for my EMC measurements. The 2.9GHz HP8594E would be just as good. These do not have a QP detector, unless Option 103 is installed
LISNYou can build your own LISN. Have a look at this thread:
https://www.eevblog.com/forum/projects/5uh-lisn-for-spectrum-analyzer-emcemi-work/msg404662/#msg404662This LISN contains a high pass filter, attenuator and limiter to protect the spectrum analyzer.
Regards,
Jay_Diddy_B