Operating Characteristics - HP 54520 Series Service Manual

FFTs
Vertical
Operating Characteristics
HP 54520A HP 54522A HP 54540A HP 54542A
Freq Range 4dcto: 250 MHz 1GHz 250 MHz (3-4 CH) 1GHz
500 MHz (1-2 CH)
Freq Resolution
inimum 977 kHz 3.9 MHz 997 kHz (84 CH) 3.9 MHz
(max samp rate)/(512 pts) 1.95 MHz (1-2 CH)
Maximum (minimum sample rate)(32768 points): 0.305 mHz (all models)
-3 dB Frequency Range dc to 500 MHz (analog bandwidth)
Frequency Accuracy 4 sample frequency + (signal frequency x 0.005%)
2x number of points
Spectrum Displays
Amplitude Power in dBm
Signal-to-noise Ratio 55 to 65 dB (typical). Noise floor can be reduced by
increasing the number of points in the FFT.
Sensitivity Range 1 dBm/div to 100 dBn/div
Dynamic Range 55 to 65 dB (typical)
Offset Range -—200 dBm to +200 dBm
Notes:
1 The gain accuracy decreases 0.08% of full scale per °C from the firmware calibration
temperature. This characteristic is valid for a temperature range +10 °C from the firmware
calibration temperature.
2 Expansion is used below 7 mV/div range so vertical resolution and accuracies are
correspondingly reduced. Below 7 mV/div full scale is defined as 56 mV.
3 The available waveform record length over HP-IB is 32,768 points in the real time mode and 500
points in the repetitive mode.
4 FFT amplitude readings are affected by input amplifier roll-off (-3dB at 500 MHz, with
amplitude decreasing as frequency increases above 500 MHz).
Operating Characteristics
The operating characteristics are listed below.
Deflection Factors All input channels: With a single screen selected, you can adjust
deflection factors from 1 mV/div to 5 V/div in a 1-2-5 sequence with the knob. You can
make fully calibrated vernier adjustments using direct keypad entry or the using the knob
with Fine selected.
Probe Attenuation Factors You can enter values from 0.9 to 1000 to scale the
oscilloscope for external probes or attenuators attached to the channel inputs. When
probe tip calibration is performed, this value is calculated automatically. The front-panel,
probe calibration source impedance is 500 Q, so with low probe impedances, automatic
calibration accuracy is dependant on the impedance of the probe.
Input Impedance 1 MQ or 50Q, selectable for channels and the external trigger.
1-7