Chapter 8 HP 53181A Specifications

Measurement Specifications

Measurement Specifications

Frequency, Period

Channel 1 Range:

 

0.1 Hz to 225 MHz

 

4.44 ns to 10 s

Channel 2 Range:

 

 

 

 

 

 

 

 

 

 

 

Option 015

 

100 Mhz to 1.5 Ghz

 

0.67 ns to 10 ns

 

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 selectable only via the HP-IB interface)

 

 

 

 

 

 

For Automatic or External Arming:

 

 

 

 

 

 

 

 

 

 

(and signals < 100 Hz using Timed Arming)

 

 

LSD Displayed:

Frequency

 

 

 

 

 

 

 

 

tres

 

 

 

 

 

 

 

 

×

or

 

 

 

 

 

 

 

 

Gate--- Time------------------------

 

 

 

 

 

 

 

 

 

 

Period

 

 

 

 

 

 

 

RMS Resolution:

 

 

 

 

 

 

 

 

 

 

 

tres2 + (2 × Trigger Error2 )⎞

Frequency

 

 

 

 

 

---

-------------------Gate--------------Time----------------

----------------- ×

or

 

 

 

 

 

 

 

Period

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tres: 650 ps typical5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N

 

 

 

 

 

For Automatic Arming: Gate Time = ---Frequency------------------------

 

 

where N = 1 for Ch1 Frequency < 1 MHz

 

 

 

 

 

 

 

4 for Ch1 Frequency > 1 MHz

 

 

 

 

 

 

 

128 for Ch2

 

 

 

 

 

 

Systematic Uncertainty:

± Time Base Error ±

 

ta cc

Frequency

 

×

or

-----------------

-----

 

 

 

 

 

 

 

Gate Time

Period

 

 

 

 

 

 

 

 

 

 

tacc: 350 ps typical 1.25 ns worst case

Trigger: Default setting is Auto Trigger at 50%

For Time or Digits Arming:

LSD Displayed:

2 2 × tre s

tjitter

×

Frequency

-------------------------------------------------------------------------------------------

+ ---------------------------

or

Gate Time × Number or Samples

Gate Time

 

Period

RMS Resolution:

4 × tres2

+ (2 × Trigger Error2 )

+ -----

tjitter

×

Frequency

------------------------------------------------------------------------------------------- ----------------------

or

Gate Time

× Number or Samples

Gate Time

 

Period

 

tres: 500 ps typical5

 

 

 

 

 

 

tjitter: 50 ps typical5

 

 

 

 

 

 

Number of Samples =

 

 

 

 

 

 

Gate Time x Frequency

(Frequency < 200 kHz)

 

Gate Time x 200,000

(Frequency > 200 kHz)

 

 

 

ta cc

×

Frequency

 

 

 

or

Systematic Uncertainty: ± Time Base Error ±

----------------------

 

 

 

 

Gate Time

 

Period

 

 

 

 

 

 

 

tacc: 100 ps typical 300 ps worst case

Trigger: Default setting is Auto Trigger at 50%

8

The following graphs may also be used to compute errors for Period Measurements. To find the Period error (ΔP), calculate the frequency of the

input signal ( F =

1

) and find the frequency error (ΔF) from the chart. Then, calculate the period error as:

ΔP =

ΔF

× P

---

------

 

P

 

 

F

 

.

Assembly-Level Service Guide

8-5

Page 239
Image 239
HP 181A manual Where N = 1 for Ch1 Frequency 1 MHz