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USER MANUAL ● CNT 9x Series ● Rev.22 February 2020
Performance Check
Frequency in Pulse: Accuracy without short-pulse compensation
Change RF generator output level to -10 dBm
The following measurements should be made, by changing the required parameters.
Table 7-15. Frequency accuracy measurements without short-pulse compensation
RF generator Pulse generator Counter
Frequency Power
Pulse
width
Pulse
repetition
interval
Start
delay
Measu-
rement
time
Sensi-
tivity
Manual
acq
frequency
Frequency
measured
Tolerance P/F
1 GHz -10
dBm
100
ns
1 ms 10 ns 50 ns HIGH 1 GHz ±0.5 MHz
1 GHz -10
dBm
500
ns
1 ms 50 ns 410 ns HIGH 1 GHz ±64 kHz
1 GHz -10
dBm
1 µs 1 ms 100
ns
800 ns HIGH 1 GHz
±32 kHz
1 GHz -10
dBm
10 µs 1 ms 1 µs 8 µs HIGH 1 GHz
±3.2 kHz
1 GHz -10
dBm
100
µs
1 ms 10 µs 80 µs HIGH 1 GHz
±0.5 kHz
Frequency in Pulse: Accuracy with short-pulse compensation
The systematic error of <200ps/Meas_time, can be significant for very short
pulses, below 10 us.
This systematic error cannot be eliminated by averaging, but reduced to <50ps/Meas_Time by
compensation of the systematic error for a specific pulse width.
Fig. 7-2. Setup for measuring short-pulse systematic error
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