mauroolParticipantmaurool February 26, 2019 at 3:08 am
I’m working on DVB-S signals and would like to visualize the QPSK constellation with the SA44B. I see that the sample rate field is limited to 150 KHz so I’m guess I’m not able to input even 2000 or 4000 Ks/s rates. I’ve succesflully displayed narrowband digital modulations like DMR.
Is this a speed limitation so I should consider the BB series or am I doing something wrong? Is it possible to display the digital modulation analysis on wideband high speed signals like DVB standards with the SA44B?
Many thanks for your help, Mauro
AndrewModeratorAndrew February 26, 2019 at 8:59 am
The IF bandwidth of the SA44B is only 250kHz (internal sample rate of 486kS/s). This is the maximum bandwidth on which you can make instantaneous measurements. A 2 or 4 MS/s sample rate would produce a signal with roughly 2-8MHz of bandwidth, exceeding the BW of the SA44B.
The BB60C is our most affordable analyzer that could measure signals with these sample rates with a IF BW of 27MHz.
Let me know if you have further questions.
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