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Timebase
Measurement Clock:
Internal Reference oscillator:
Oscillator Temperature Stability:
Initial Oscillator Adjustment Error:
Oscillator Ageing Rate:
Calibration adjustment range:
Measurement Functions
Frequency (Inputs A, B or C)
A Input Frequency Range:
B input Frequency Range:
C input Frequency Range:
Resolution:
Period (Inputs A, B or C)
A Input Period Range:
B input Period Range:
C input Period Range:
Resolution:
Pulse Width Modes (Input A only)
Functions:
Pulse Width Range:
Averaging:
Resolution:
Total Count (Input A only)
Count range:
Minimum pulse width:
Frequency Ratio B:A
Resolution:
Measurement Time
Selectable as 100s, 10s, 1s or 0.3s. The instrument displays the average value of the input
signal over the measurement time selected, updated every 2s, 1s, 0.5s or 0.3s respectively. The
hardware captures the count values and continues measuring without any dead time.
Resolution
The displayed resolution depends upon measurement time and input frequency. The basic
resolution of period is 8 digits for every 2 seconds of measurement time. Frequency resolution is
the reciprocal of period resolution. Usable resolution can be reduced by noise at low frequencies.
Accuracy
Measurement accuracy is timebase accuracy + measurement resolution + 2 counts.
50MHz.
10MHz TCXO with electronic calibration adjustment.
Better than ± 1ppm over rated temperature range.
< ± 0.2ppm at 21ºC.
< ± 1ppm first year.
> ± 8ppm.
< 0.001Hz (DC coupled) to >125MHz
80MHz to >3000MHz.
<2Ghz to >6GHz.
up to 10 digits (see below) or 0.001Hz
8ns to 1000s (DC coupled)
0.333ns to 12.5ns
0.166ns to 0.5ns
up to 10 digits (see below)
Width high or low, ratio H:L (high time to low time) or duty cycle.
40ns to 1000s
Automatic within measurement time selected, up to 50 pulses.
20ns for one pulse; up to 1ns or 10 digits with multiple pulse
averaging. 0.01% for Ratio H:L and Duty Cycle.
1 to 9 999 999 999
8ns
Equal to the resolution of the two frequency measurements.
If the ratio exceeds ten digits, displays six digits plus exponent.
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