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TWO CHANNEL FFT NETWORK ANALYZER COMPARISON
SR780 HP 35665A HP 35670A
Specifications
Frequency Range 2 channels: DC to 102.4 kHz DC to 51.2 kHz DC to 51.2 kHz
1 channel: DC to 102.4 kHz DC to 102.4 kHz DC to 102.4 kHz
FFT Span Both displays may have different Both displays must have the same span. Both displays must have the same span.
spans.
FFT Resolution 100, 200, 400, 800 lines 100, 200, 400, 800 lines 100, 200, 400, 800, 1600 lines
Dynamic Range FFT: -80 dBfs -72 dBfs -80 dBfs
Swept Sine: 145 dB 120 dB 130 dB
Octave 80 dB 80 dB 80 dB
Analysis:
Real-Time BW (avg. on, 2 channels) 102.4 kHz 12.8 kHz 12.8 kHz
Meas. Rate (400 lines, 2 channels) > 512 avg/sec. > 15 avg/sec. > 33 avg/sec.
Input Range 3.16 mVpk to 50.11 Vpk 3.99 mVpk to 31.7 Vpk 3.99 mVpk to 31.7 Vpk
Input Noise Level < -160 dBVrms/Hz < -130 dBVrms/Hz < -130 dBVrms/Hz
Amplitude Accuracy (cross channel)