17
Measurements and Math 54830B, 54831B and 54832B 54845B and 54846B
Waveform Measurements
Voltage Peak-to-Peak, Minimum, Maximum, Average, RMS, Amplitude, Base, Top, Overshoot, Preshoot,
Upper, Middle, Lower, Area
Time Rise time, Fall time, Period, Frequency, Positive Width, Negative Width, Duty Cycle, Delta Time,
Tmin, Tmax, Channel to Channel Phase, Cycle-to Cycle Jitter (54845B/46B only)
Frequency Domain FFT Frequency, FFT Magnitude, FFT Delta Frequency, FFT Delta Magnitude, FFT Phase
Eye Pattern (54845B/46B only) Eye Height, Eye Width, Jitter, Crossing %, Q-Factor, Duty Cycle Distortion
Measurement Modes
Automatic Measurements Measure menu access to all measurements, 4 measurements can be displayed simultaneously
QuickMeas+ Front panel button activates four pre-selected or four user defined automatic measurements
Drag and Drop Measurement Toolbar Measurement toolbar with common measurement icons that can be dragged and dropped onto
the displayed waveforms
Statistics Displays the mean, standard deviation, minimum and maximum measurement values for the
displayed automatic measurements
Histograms Vertical (for timing and jitter measurements) or horizontal (noise and amplitude change) modes,
regions are defined using waveform markers. Measurements included: mean, standard deviation,
peak-to-peak value, median, total hits, peak (area of most hits), and mean ± 1,2, and 3 sigma
Eye Diagram Measurements Eye diagram display mode allows triggering on both the negative-going and positive-going edges of
a signal. Eye diagram measurements include eye height, eye width, jitter, crossing percentage,
Q factor, and duty cycle distortion (54845B/46B only)
Mask Testing Allows pass/fail testing to user-defined or Agilent-supplied waveform templates. AutoMask allows
user to create a mask template from a captured waveform and define tolerance range in
time/voltage or percentage. Test modes include test forever, test to specified time or event limit,
and stop on failure. Communications Mask Test Kit Option provides a set of ITU-T G.703, ANSI
T1.102, and IEEE 802.3 industry standard masks for compliance testing (54845B/46B only)
Marker Modes Manual Markers, Track Waveform Data, Track Measurements
Waveform Math 4 functions f1-f4. Select from Add, Average, Differentiate, Divide, FFT Magnitude, FFT Phase,
Integrate, Invert, Magnify, Min, Max, Multiply, Subtract, Versus, Measurement Trend
(54845B/46B only)
FFT
Frequency Range
6
54830B/31B/32B: DC to 2 GHz (2 channels interleaved), DC to 1 GHz (each channel)
54845B/46B: DC to 4 GHz (2 channels interleaved), DC to 2 GHz (each channel)
Frequency Resolution Resolution = Sample Rate / Memory Depth,
Best resolution at maximum sample rate 54830B/31B/32B: = 4 GSa/s / 16 M = 250 Hz
54845B/46B: = 8 GSa/s / 64 K = 125 kHz
Frequency Accuracy (1/2 frequency resolution)+(5x10-5 )(signal frequency)
Signal-to-Noise Ratio
9
80 dB at 1 Mpt memory depth (54830B/31B/32B)
70 dB at 32 kpts memory depth (54845B/46B)
Window Modes Hanning, Flattop, Rectangular
Performance Characteristics continued