Chapter 3: Testing Performance
Delta-time Measurement Accuracy Test
3–28
Delta-time Measurement Accuracy Test
Specification
Equipment Required
Connections
Procedure
1
Connect the microwave signal source to scope channel 1 as shown in the connection
diagram above.
2 Set up the scope as follows:
a Press Default Setup.
b Set channel 1 vertical sensitivity to 100 mV/div.
c Set the horizontal scale to 48 ps/div (54855A and 54854A) or 76 ps/div (54853A).
≥256 Averages RMS: 70 fs
Peak: ±[(0.5 ps) + (1x10-6 * |reading|)]
Averaging disabled RMS: 2.0 ps
Peak: ±[(7.0 ps) + (1x10-6 * |reading|)]
Signal peak-to-peak amplitude ≥5 divisions, vertical scale ≥10mV/div, signal rise time 155ps (54853A) ≤225 ps (54854A) 150 ps
(54855A), sample rate = 20 GSa/s, sinx/x interpolation enabled, measurement threshold = fixed voltage at 50% level.
Measurement is between two edges on a single channel.
RMS value refers to the standard deviation of 256 consecutive measurements performed using an individual instrument.
Description Critical Specifications Recommended Model/Part
Numbers
Microwave CW Generator Maximum Frequency ≥6 GHz
Power range: -20 dBm to +16 dBm into 50Ω
Frequency Accuracy better than 0.4 ppm
Output resistance = 50Ω
Agilent E8247C with Opt 520 or
Agilent 82712B with Opt 1E5 or
Agilent 8665B with Opt 004
Microwave Cable Assembly 50Ω Characteristic Impedance
3.5 mm (m) or SMA (m) connectors
Max Frequency ≥18 GHz
Agilent 8120-4948 or
Agilent 11500E or
Gore EKD01D010480
Adapter 3.5 mm (f) to Precision BNC Agilent 54855-67604
Scope
Under
Test
Channel 1
Microwave
Signal
Source
50 Ohm
RF Output
Click here and enter
48E-12 or 76E-12
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