7-15
USER MANUAL ● CNT 9x Series ● Rev.22 February 2020
Performance Check
This will set up the test set to the first frequency measurement.
The following measurements should be made, by changing the required parameters.
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
400 MHz -20 dBm 100
µs
1 ms 10 µs 80 µs HIGH 400 MHz ±1 MHz
1 GHz -20 dBm 100
µs
1 ms 10 µs 80 µs HIGH 1 GHz
±1 MHz
10 GHz -20 dBm 100
µs
1 ms 10 µs 80 µs HIGH 10 GHz
±10 MHz
27 GHz -20 dBm 100
µs
1 ms 10 µs 80 µs HIGH 27 GHz
±10 MHz
40 GHz -15 dBm 100
µs
1 ms 10 µs 80 µs HIGH 40 GHz
±10 MHz
Frequency in Pulse: Sensitivity
Table 7-14. Sensitivity measurements:
1. Setup the pulse generator to generate a pulse
signal with Pulse repetition interval of 1ms, Pulse
width = 100µs and signal level from 0 to 1 Volt
2. Set HF generator signal to 1 GHz, - 10dBm
3. Connect a 50 ohm power splitter to
the RF generator output. Connect one output of the splitter
with a short (low loss) cable to the CNT-90XL. Connect the other output to the power meter.
Note the power meter reading as the reference value.
Adjust the RF generator output until the desired output level is read on the power meter,
compensated for the loss in the input cable from the power splitter.
4. Set up the CNT-90XL unit :
a. Set unit to Pulsed RF frequency measurement mode:
“Meas Func => Pulsed RF => Freq in Pulse => C”
b. Set manual acquisition mode ON, and set the center frequency to 1GHz:
“Settings => Misc => Input C Acq => Manual and “Freq C Centre“ to 1GHz
c. Set up the measurements parameters:
“Settings => Pulsed RF” and set: “Start delay” to 10us, “Meas Time” to 80us, “Pulse
Sensitivity => High”.
d. Set up Statistics parameters:
“Settings=>Statistics” and set: “No of samples” to 100, Enter “Stat/Plot” viewing
mode.
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