Chapter 3 Specifications
Introduction
3-14
Operating Guide
Frequency Ratio:
Measurement is specified over the full signal range of each input.
Results Range:
10
–10
to 10
11
‘Auto’ Gate Time:
100 ms (or sufficient cycles on Channel 1 to make a valid measurement, whichever is longer)
LSD:
RMS Resolution:
To minimize relative phase measurement error, connect the higher frequency signal to Channel 1 when possible.
Peak Volts
Measurement is specified on Channels 1 for DC signals; or for AC signals of frequencies between 100 Hz and 30 MHz with peak-to-peak
amplitude greater than 100 mV. (The measurement will continue to operate up to 225 MHz, though results are for indication only.)
Results Range:
–5.1 V to +5.1 V
Resolution:
10 mV
Systematic Uncertainty for AC signals:
25 mV + 10% of V
for DC signals:
25 mV + 2% of V
Use of the input attenuator multiplies all voltage specifications (input range, results range, resolution and systematic uncertainty) by a
nominal factor of 10. For example with AC signals, the Systematic Uncertainty becomes: 250 mV + 10% of V.
Measurement Specifications (Continued)
h1
Ch 2
⁄
Ch2
Ch
⁄
Rat io 1 2
⁄
:
1
Ch2 Freq
Gate Time
×
------------------------------------------------------------
Rat io 2 1
⁄
:
Ch2 Freq
Ch1 Freq
(
)
2
Gate Time
×
-------------------------------------------------------------------
Ra tio 1 2
⁄
:
2
1
Ch1 Freq
Ch2 Trigger Error
×
(
)
2
+
×
Ch2 Freq
Gate Time
×
---------------------------------------------------------------------------------------------------------------
Ra tio 2 1
⁄
:
2
Ch2 Freq
1
Ch1 Freq
Ch2 Trigger Error
×
(
)
2
+
×
×
Ch1 Freq
(
)
2
Gate Time
×
-----------------------------------------------------------------------------------------------------------------------------------------------
Summary of Contents for 53181A
Page 2: ...NOTES...
Page 14: ...Contents x Operating Guide...
Page 24: ...Preface xx Operating Guide...
Page 33: ...1 Getting Started...
Page 68: ...Chapter 1 Getting Started Making Measurements 1 36 Operating Guide 1...
Page 69: ...2 Operating Your Frequency Counter Operator s Reference...
Page 143: ...3 Specifications...
Page 160: ...Chapter 3 Specifications Introduction 3 18 Operating Guide...
