BNC 1105 Universal Counter - Manual (Page 86)

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6.10 How to do the Time Interval Calibration
The calibration is for Time Interval excluding the External ARM. Please do
the following procedures to finish the calibration.
Press UTILITY > CAL > Enter Security Code > Cal Diag > T-F Fine1.
Under the Agilent 81110A operation, the procedures should be
MODE/TRG > Pulse-Period > internal PLL.
Under the Agilent 81110A operation, press LEVELS and then Output1 &
Output2 buttons to set Amplit to 1V and the Offset to 0V respectively.
Under the Agilent 81110A operation, press TIMING, and set the Freq1 &
Freq2 to ON, and adjust them to 1MHz respectively.
Under the Agilent 81110A operation, in the Output1 and Output2, set the
Delay to 0s, DtyCyc to 50 % and LeadE to 0.8ns.
Connect from the OUTPUT1 and OUTPUT2 of the Agilent 81110A to the
Counter’s CH1 and CH2 respectively.
Press the softkey under RunCal to do the calibration. Then, the counter’s
display will show “Calibrating…”. The finished message will disappear
from the display as calibration is done. On the contrary, the NG message
will show on the display as calibration is failed.
6.11 How to do the Time Interval Calibration
(Including External ARM)
The calibration is for Time Interval including the External ARM. Please do
the following procedures to finish the calibration.
1. Press UTILITY > CAL > Enter Security Code > Cal Diag > T-F
Fine2.
2. Under the Agilent 33220A operation, the procedures should be
Utility > DC ON > Output Setup > Load.
3. Adjust the square wave to 20MHz, and set the Ampl to 1.65Vpp,
the Offs to 0.75Vdc and DutyCycle to 50% on the Agilent 33220A.
4. Connect Agilent 33220A’s Sync to the Counter’s External ARM.
5. Under the Agilent 81110A operation, the procedures should be