5.11 Time Base Accuracy
5.11.1 Description
An external sine wave generator of 10.0 MHz with frequency accuracy better than 1
PPM is used.
Specifications
10 GHz clock : accuracy : ≤ ±0.0005 % or ≤ ±5 PPM
5.11.2 10 GHz Clock Verification Procedure
Recall Timebase Accuracy.lss or configure the DSO
Panel Setups : Recall FROM DEFAULT SETUP
Channels trace ON Channel 1
Input gain : .1 V/div.
Input offset : 0 mV
Trigger setup : Edge
Trigger on : C1
Slope 1 : Pos
Level 1 : 100 mV
Trigger mode : Norm
Delay : 0 %
Time base : 500 msec/div.
Channel use : 4
Measure : Parameters
P1 : Amplitude of C1
P2 : Frequency of C1
Connect the RF output of the signal generator through a 50 Ohm
coaxial cable into Channel 1.
Set the generator frequency to 10.0 MHz.
Adjust the generator output amplitude to get 6 divisions peak to peak.
Read of the frequency parameter (to 2 decimal places) and record the value in
Table 18.
Verify that the error is less than 50 Hz.
WR6K Rev.D Performance Verification 5-41
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