HP 181A manual Worst Case RMS Resolution

8

Chapter 8 HP 53181A Specifications

Measurement Specifications (Continued)

Measurement Specifications (Continued)

Worst Case RMS Resolution

Automatic or External Arming:

	1E+02
			Auto Armed
	1E+00				1ms
(Hz)					10ms
	1E-2				100ms
					1s
Error
	1E-4
					10s
Frequency
	1E-6
					Gate
	1E-8				Time
	1E-10
	10	100	1000	10000	100000 1000000	1E+07	1E+08	1E+09	1E+10

Input Frequency (Hz)

Time or Digit Arming:

	1E+02
	1E+00
(Hz)				1ms
	1E-2			10ms
Error	1E-4			100ms
				1s
Frequency
	1E-6
				10s
	1E-8			Gate
				Time
	1E-10
	10	100	1000	10000 100000 1000000 1E+07 1E+08 1E+09	1E+10

Input Frequency

The preceding graphs do not reflect the effects of trigger error. To place an upper bound on the added effect of this error term, determine the frequency error from the appropriate graph and add a trigger error term as follows:

Automatic or External Arming							Time or Digit Arming
Frequency Error +	⎛	--2----×-----Trigger---------------------Error------------⎞	×	Frequency	Frequency Error +	⎛	-----4----×---------2-----×-----Trigger---------------------Error-------------	⎞	×	Frequency
				or						or
	⎝	Gate Time ⎠		Period		⎝ Gate Time × Number of Samples⎠				Period

8-6 Assembly-Level Service Guide