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Vector Modulation Analyzer
- Well suited to receive measurements of baseband I and Q channels in a coherent
detector or demodulator
- Measurement aids include five separate markers for measuring I channel voltage, Q
channel voltage, magnitude, phase and time. Each marker has a delta function
associated with it
- Automated constellation measurements give readouts of closure, lock angle error,
and quadrature error on six common modulation schemes from QPSK to 256QAM
- Cable length compensation, gated TDMA measurements, and transient analysis
- Modulation Schemes: QPSK, 9PRS, 16QAM, 25QAM, 256QAM, 49QAM, 49QPR & 81QPR
Specifications
I and Q Channels
- Bandwidth (-3dB): 350 MHz dc coupled; approximately 1 kHz to 350 MHz, ac coupled
- Deflection Factor Range: 5 mV/div to 1 V/div
- I or Q Offset Range: ± 10 divisions
- Maximum DC Coupled Input Voltage: ± 5 V peak
- Maximum AC Coupled Input Voltage: ± 25 V dc; ± 5 V peak ac
- Transition Time (10% to 90%): 1.1 ns
- Input Termination: 50 ohms or 75 ohms
- Input Coupling: each channel independently: ac, dc, or ground (input
disconnected)
Timing
- Acquisition Method: repetitive sampling
- Time per Division Range: 500 ps/div to 2 ms/div, continuously adjustable
- Delay I & Q Range: 0 to 100 divisions for specified performance, 20 ms
maximum
- I Delay, Q Delay Range: 0 to 5 divisions, 20 ms maximum
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