NARDA IDA - Page 265

17.3 Operating modes
Narda IDA-3106 257
17.3.6 I⁄Q Analyzer
Measurement principle Selective level measurement at a selectable frequency from
9 kHz to 6 GHz with I/Q demodulation and subsequent FFT
Fast Fourier Transformation
(FFT)
• FFT points selectable: 256, 512, 1024, 2048
• FFT window overlap selectable: 50 %, 75 %, 87.5 %
• FFT window type: Nuttall filter
Channel bandwidth CBW,
(-6 dB nominal)
100 Hz to 32 MHz
In steps of
100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000 Hz,…
10 MHz, 13.33 MHz, 16 MHz, 20 MHz, 26.67 MHz, 32 MHz
Filter • Type: Steep cut-off channel filter (app. raised cosine)
• Roll-off factor: 0.16
Video bandwidth (VBW) • 0.01 Hz to 32 MHz or off
Coupled with selected CBW (VBW = CBW/1 … CBW/10000)
• Only affects the magnitude measurement and is useful for
triggering
Measurement Views
I/Q (Time Domain) • Measures the real and/or imaginary part of the signal I,
Q (max. 250000 samples each)
• Time resolution coupled to 1/CBW (31.25 ns to 10 ms)
Magnitude (Time Domain) • Measures the actual magnitude, max. 250000 samples
• Time resolution coupled to 1/CBW (31.25 ns to 10 ms)
High Resolution Spectrogram
(Frequency Domain)
• Gapless spectrogram with a time resolution up to 1 µs
• Up to 7805 spectrums can be displayed
• Fspan = CBW x 0.8 (< 22 MHz)
Persistence Spectrum
(Frequency Domain)
• Indicates by colors how often an amplitude value is present for
a specific frequency
• Persistance range selectable: 6 different ranges from
0.01 %–100 % to 1 %–10 %
Auto: 0.01 %–100 % (corresponds to 4 decades)
Triggering • Free run, single, multiple, time controlled
• Programmable trigger level, trigger slope and trigger delay
Magnifier (Graphical Zoom) • Simultaneous display of the selected trace and an enlarged view
of the section of interest for I/Q and Magnitude
• Magnification level of 25 x and 500 x
I/Q Streaming
(only IDA 2, 3106/02)
• Remote controlled data streaming is provided via Ethernet
• Gapless data streaming for CBW settings from 100 Hz to
400 kHz
• Blockwise data transfer for all CBW settings