53210A-400 AGILENT TECHNOLOGIES, 53210A-400 Datasheet - Page 20

• Manufacturer Part Number: 53210A-400
• Description: Frequency Counter With GPIB Port, 10, 0.2 Ppm
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 53210A-400

• Bandwidth: 350MHz
• Counter Measuring Functions: Frequency, Period,Totalize, Ratio, Time Interval, Rise/Fall, Width, Burst Width, Duty Cycle, Phase, PRI, PRF
• Lead Free Status / RoHS Status: na

Appendix A - Worked Example
Basic Accuracy Calculation for Frequency Measurement
Parameter assumptions:
• 53220A
• 95% confidence
• 100 MHz signal, 1 sec gate
• AUTO frequency mode
• Level: 5 V input signal amplitude
• TCXO standard timebase for unit plugged in for 30 days
Process:
Basic accuracy = ± [(k * Random Uncertainty) + Systematic Uncertainty + Timebase Uncertainty]
1. Use k=2 for 95% confidence and k=2.5 for 99% confidence calculations)………………..k = 2
2. Random uncertainty for frequency measurement =
3. Systematic uncertainty for frequency measurement = If R
4. Timebase uncertainty = (aging + temperature + calibration uncertainty) = (0.2 ppm + 1 ppm + 0.5 ppm) =
Basic accuracy = ± [(k * random uncertainty) + systematic uncertainty + timebase uncertainty] =
± [(2 * (23.3 E-12)) + 2 * 10 E-12 + 1.7 E-6] = ± 1.7000566 E-6 parts error
Note: Using a higher accuracy timebase or locking to an external timebase standard will have the biggest impact on
improvement to accuracy calculations.
T
T
E
Vx = N/A (remove signal from other channel)
SR
Since T
Gate time = 1 sec
Aging: 0.2 ppm
Temperature: 1 ppm
Calibration uncertainty: 0.5 ppm
SS
E
N
(for 5 V)
-TRIG POINT
= Assume input signal RMS noise voltage is 0.
= 100 ps
SS
>> T
= maximum slew rate (sine)SR= 2πF*V
E
=
, we use the R
(500 μV
SR
E
2
-TRIG POINT
equation. Value is much greater than 6. so we limit RE to 6 due to gate time. R
+ E
N
2
+Vx
2
)
½
=
0 to PK
1.4* (T
R
= 2π(100 MHz)*5 V = 3.14*10
E
E
(500 μV
3.14 * 10
* Gate Time
>= 2: 10 ps/gate max, 2 ps/gate (typ) = 2 * 10 E-12 parts error
20
SS
2
+ T
2
)
½
9
E
2
)
½
=
=
.159 ps
1.4* (100ps
9
Volts/Hz
6 * 1 s
2
+ .159ps
2
)
½
1.7 E-6
parts error
=
E
23.3 E-12
parts error
= 6