Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 246)

12. 10 MHz Standard Adjustment (SN 2637A and Below)

Frequency Counter should now display the difference between

the frequency of the INPUT A signal (A22 10 MHz Frequency

Standard) and 10.0 MHz with a displayed resolution of 1

mHz

(0.001 Hz).

7. Wait at least two gate periods for the Frequency Counter to settle,

and record the frequency of the A22 10 MHz Frequency Standard

as reading

Reading # 1: mHz

8. Allow the spectrum analyzer to remain powered (not in

STANDBY) and undisturbed for an additional 24 hours.

9. Repeat steps 3 through 7 and record the frequency of the A22 10

MHz Frequency Standard as reading

#2.

Reading

#2: mHz

10. If the difference between reading

and reading

is greater

than 1

mHz,

the A22 10 MHz Frequency Standard has not

achieved its specified aging rate; the spectrum analyzer should

remain powered (not in STANDBY) and undisturbed for an

additional 24-hour interval. Then, repeat steps 3 through 7,

recording the frequency of the 10 MHz Frequency Standard at the

end of each 24-hour interval, until the specified aging rate of 1

mHz/day ( lX1O-g/day) is achieved.

Reading

#3:

mHz

Reading

#4:

mHz

Reading

#5:

mHz

Reading

#6:

mHz

Reading

#7:

mHz

Reading

#8:

mHz

Reading

#9:

mHz

Reading

#lo:

mHz

Reading # 11:

mHz

11. Position the spectrum analyzer on its right side as shown

in Figure

3-52,and

remove the bottom cover. Typically, the

frequency of the A22 10 MHz Frequency Standard will shift

slightly when the spectrum analyzer is reoriented. Record this

shifted frequency of the A22 10 MHz Frequency Standard.

Reading # 11:

mHz

12. Subtract the shifted frequency reading in step 11 from the

last recorded frequency in step 10. This gives the frequency

correction factor needed to adjust the A22 10 MHz Frequency

Standard.

Frequency Correction Factor:

mHz

13. On the Frequency Counter, select a 1 second gate time by pressing

(GATETIME_)

C-TIME).

The Frequency Counter should now

display the difference between the frequency of the INPUT A

signal and 10.0 MHz with a resolution of 0.01 Hz (10

mHz).

3.106

Adjustments

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Agilent Technologies HP 8566B Spécifications Page 246

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