Setting Frequency Error Limits

Setting Frequency Error Limits
You can set upper and lower Frequency Error Limits for your Frequency Error Measurement results.
If Freq Error Limits are turned On, and your measured frequency error is within the limits you have specified, the numeric result reported in the metrics portion of the screen will be displayed in green, and the Limit Pass will be indicated by "(P)" after the result. If your measured frequency error is outside your specified limits, the numeric result reported in the metrics portion of the screen will be displayed in red, and the Limit Failure will be indicated by "(F)" after the result.
To Set the Frequency Error Upper and Lower Limits:

Step
Notes

1
[Setup]

2
[Freq Error Limits]

3
[Limits]

4
[On] or [Off]

5
Set the upper limit.

[High Limit]
Enter the number on the numeric keypad.
[ppm]

6
Set the lower limit.

[Low Limit]
Select Auto or Manual
If you have selected Manual in Step 6b, enter the number on the numeric keypad.
If you have selected Manual in Step 6b, press [ppm].
If you select Auto, the Low Limit is automatically set to negative (High Limit). For example, if High Limit is set to 0.05 ppm, then the Auto Low Limit is set to -0.05 ppm.
If you select Manual, you must specify the limit in ppm.
If you switch from Manual to Auto, and then back to Manual, the previous Manual setting is not restored.

NOTE: The disabled gray keys showing your High Limit and your Low Limit in Hz are for information only. They display the calculated frequency error limits in Hz. The displayed values (in Hertz) are calculated from your current frequency and your specified limits in ppm.


	Step	Notes
1	[Setup]
2	[Freq Error Limits]
3	[Limits]
4	[On] or [Off]
5	Set the upper limit. [High Limit] Enter the number on the numeric keypad. [ppm]
6	Set the lower limit. [Low Limit] Select Auto or Manual If you have selected Manual in Step 6b, enter the number on the numeric keypad. If you have selected Manual in Step 6b, press [ppm].	If you select Auto, the Low Limit is automatically set to negative (High Limit). For example, if High Limit is set to 0.05 ppm, then the Auto Low Limit is set to -0.05 ppm. If you select Manual, you must specify the limit in ppm. If you switch from Manual to Auto, and then back to Manual, the previous Manual setting is not restored.