BNC 1120 - 1pS Time Interval Counter - Manual (Page 29)

Model 1120 - 1pS Time Interval Counter NUT 012 Ed. 6 Date : 18/01/2011
BERKELEY NUCLEONICS Page -29 / 36 -
5. O PERATION EXAMPLES
5.1. Example 1
Realize in local mode a repetitive Time interval measurement.
Initial setup
Turn on the BNC 1120 with switch located on the rear panel
After few second the first line of the menu, BNC 1120 is displayed
The instrument must warm-up at least 20 minutes for maximum accuracy
Test signal
The operation example is performed using a test signal with following characteristics (P ulse
generator):
Duration: 1000 ns,
Rise time 5 ns,
Level: 3 V,
Repetition time : 100 Hz,
This signal must be coupled with 50 divider then connected to start and stop input of BNC 1120
The length of the START cable = 1 m. T
Setting up the instrument
Use the front panel keyboard to reset the Setup menu as follows
Start trigger External
Start level 1.50 V
Start polarity +
Stop trigger External
Stop level 1.50 V
Stop polarity +
Samples 1000
Sequence repetitive
Arming mode on start
Start the measurement
Display the result line Mean delay / jitter, and press the OK keys to start the measurement
The front panel leds busy must be on and tilt each second
Result must be
Delay = 5 200 ns
Jitter = 8 ps rms
For stopping the measurement press the ESC key