2. 10 MHz Precision Frequency Reference Output Accuracy, HP 8590 EM-Series Option 004

3. Set the frequency counter controls as follows:

FUNCTION/DATA : :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: : FREQ A INPUT A

X10 ATTN : :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: OFF

AC : :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: : OFF

50￿ Z : :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: :: OFF AUTO TRIG :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: : ON 100 kHz FILTER A :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: : OFF

4.On the frequency counter, select a 10 second gate time by pressing

4GATE TIME5 10 4GATE TIME5. O￿set the displayed frequency by 010.0 MHz by pressing 4MATH5, 4SELECT/ENTER5 , 4CHS/EEX5 10 4CHS/EEX5 6 4SELECT/ENTER5,

4SELECT ENTER5. The frequency counter should now display the di￿erence between the INPUT A signal and 10.0 MHz with 0.001 Hz resolution.

5.Proceed with the next step 5 minutes after the Power On Time noted in step 2.

6.Wait at least two periods for the frequency counter to settle. Record the frequency counter reading in the 10 MHz Reference Accuracy Worksheet as Counter Reading 1 with 0.001 Hz resolution.

7.Proceed with the next step 30 minutes after the Power On Time noted in step 2.

8.Record the frequency counter reading in the 10 MHz Reference Accuracy Worksheet as Counter Reading 2 with 0.001 Hz resolution.

9.Proceed with the next step 60 minutes after the Power On Time noted in step 2.

10.Wait at least two periods for the frequency counter to settle. Record the frequency counter reading in the 10 MHz Reference Accuracy Worksheet as Counter Reading 3 with 0.001 Hz resolution.

10 MHz Reference Accuracy Worksheet

Description

 

Measurement

 

 

 

 

Counter Reading 1

 

 

Hz

Counter Reading 2

 

 

Hz

Counter Reading 3

 

 

Hz

 

 

 

 

 

 

Performance Veri￿cation Tests 2-7