Specifications

16
Basic accuracy
1
= ± [(k * Random Uncertainty) + Systematic Uncertainty + Timebase Uncertainty]
Measurement Function
1-σ Random Uncertainty
Systematic Uncertainty
Timebase
Uncertainty2
Frequency
3
Period (parts error)
1.4* (T
SS
2
+ T
E
2
)
1/2
R
E
* gate
If R
E
≥ 2: 10 ps / gate (max), 2 ps / gate (typ)
4
If R
E
< 2 or REC mode (R
E
= 1): 100 ps / gate
●
Option 106 & 115:
Frequency
3
Period (parts error)
1.4* (T
SS
2
+ T
E
2
)
1/2
R
E
* gate
If R
E
≥ 2: 10 ps / gate (max), 2 ps / gate (typ)
4
If R
E
< 2 : 100 ps / gate
●
Frequency Ratio A/B (typ)
5
(parts error)
1.4* Random Uncertainty
of the worst case Freq input
Uncertainty of Frequency A plus Uncertainty
of Frequency B
Single Period
(parts error)
17
1.4* (T
SS
2
+ T
E
2
)
1/2
Period Measurement
T
accuracy
Period Measurement
●
Time Interval (TI)
17
, Width
17
, or
Rise/Fall Time
7, 17
(parts error)
1.4* (T
SS
2
+ T
E
2
)
1/2
|TI Measurement|
Linearity
6
+ Offset
8
|TI Measurement|
Linearity = T
accuracy
Offset (typ) = T
LTE
+ skew + T
accuracy
●
Duty
5, 9, 10, 17
(fraction of cycle error)
2* (T
SS
2
+ T
E
2
)
1/2
* Frequency (T
LTE
+ 2*T
accuracy
)*Frequency
Phase
5, 9, 17
(Degrees error) 2* (T
SS
2
+ T
E
2
)
1/2
* Frequency *
360º
(T
LTE
+skew+2*T
accuracy
)*Frequency*360º
Totalize
11
(counts error) ± 1 count
11
Volts pk to pk
12
(typ)
5 V range
DC, 100 Hz - 1 kHz: 0.15% of reading + 0.15%
of range
1 kHz - 1 MHz: 2% of reading + 1% of range
1 MHz - 200 MHz: 5% of reading + 1% of range
+ 0.3 * (Freq/250 MHz) * reading
Accuracy Specications
Denitions
Random Uncertainty
The RSS of all random or Type-A measurement errors expressed as the total RMS or 1-σ measurement uncer-
tainty. Random uncertainty will reduce as 1/√N when averaging N measurement results for up to a maximum
of approximately 13-digits or 100 fs.
Systematic Uncertainty
The 95% condence residual constant or Type-B measurement uncertainty relative to an external calibration reference.
Generally, systematic uncertainties can be minimized or removed for a xed instrument setup by performing relative
measurements to eliminate the systematic components.
Timebase Uncertainty
The 95% condence systematic uncertainty contribution from the selected timebase reference. Use the appropriate
uncertainty for the installed timebase or when using an external frequency reference substitute the specied uncertainty
for your external frequency reference.