HP 181A Measurement Specifications

Chapter 7 HP 53131A/132A Specifications

Measurement Specifications

Measurement Specifications

Frequency, Period

Channel 1 and 2 Range:	0.1 Hz to 225		MHz	4.44 ns to 10 s
Channel 3 Range:
Option 030	100	MHz to 3	GHz	0.33 ns to 10 ns
Option 050	200	MHz to 5	GHz	0.2 ns to 5 ns
Option 124	200	MHz to 12.4 GHz		80 ps to 5 ns

(Period 2 or 3 selectable only via the HP-IB interface)

For Automatic or External Arming:

(and signals < 100 Hz using Timed Arming)

LSD Displayed:

⎛	tres ⎞	×	Frequency
			or
⎝ ----------Gate-----Time------------⎠
			Period

RMS Resolution:

⎛	tres2 + (2 × Trigger Error2 )⎞		×	Frequency
⎜ -----	-----------------Gate--------------Time---------------------------------	⎟		or
⎝		⎠		Period

	HP 53131A		HP 53132A
		tres		tres
	typical	650 ps		200 ps
	see graphs for worst case resolution performance
	For Automatic Arming:		Gate Time	N
				= ---------------------------
				Frequency
	where N = 1 for Ch1 or Ch2 Frequency < 1 MHz
		4 for Ch1 or Ch2 Frequency > 1 MHz
		128 for Ch3
		⎛		tacc	⎞	Frequency
						×	or
Systematic Uncertainty: ⎝± Time Base Error				± ----------------------⎠
				Gate Time			Period
	HP 53131A		HP 53132A
		tacc		tacc
	typical	350 ps		100 ps
	worst case	1.25 ns		500 ps

Trigger: Default setting is Auto Trigger at 50%

For Time or Digits Arming:

7

LSD Displayed:

⎛	2 2 × tres	tjitter	⎞	×	Frequency
⎜-------------------------------------------------------------------------------------------		+ ---------------------------	⎟		or
⎝Gate Time × Number or Samples		Gate Time⎠			Period

RMS Resolution:

⎛	4 × tres2 + 2 × Trigger Error2		tjitter	⎞	Frequency
⎜-------------------------------------------------------------------------------------------			+ ---------------------------	⎟ x	or
⎝Gate Time ×		Number or Samples	Gate Time⎠		Period

	HP 53131A		HP 53132A
	tres	tjitter	tres	tjitter
	typical 500 ps	50 ps	225 ps	3 ps
	see graphs for worst case resolution performance
	Number of Samples =
	Gate Time x Frequency		(Frequency < 200 kHz)
	Gate Time x 200,000		(Frequency > 200 kHz)
		⎛	tacc	⎞	Frequency
					×	or
Systematic Uncertainty: ⎝± Time Base Error ± ----------------------⎠
			Gate Time			Period
	HP 53131A		HP 53132A
		tacc	tacc
	typical	100 ps	10 ps
	worst case	300 ps	100 ps

Trigger: Default setting is Auto Trigger at 50%

The following graphs may also be used to compute errors for Period Measurements. To find the Period error (				P), calculate the frequency of the
input signal ( F =	1	) and find the frequency error ( F) from the chart. Then, calculate the period error as:	P	=	⎛	F⎞		× P
	---				⎝	------	⎠
	P					F

Assembly-Level Service Guide 7-5