Low Frequency Linearity - Tektronix SCD1000 Service Manual

Performance Verification Procedure
Low Freq uency Linearity
Specification:
Setup:
4-46
The low frequency linearity is checked using the calibration generator and the
SCD offset control to position a 20% full-scale square wave anywhere within
the 10-90% full-scale range. The resulting measured amplitudes are then
compared for accuracy.
1 % full-scale or less of compression or expansion when a 20% full-scale
signal is positioned anywhere from 10 - 90% of the vertical window.
Press Init in the Save Recall menu. For the SCD1000, connect the CG output
to the channel A input of the SCD. For the SCD5000, connect the trigger output
to the TRIG IN input.
Setting
SCD1000 SCD5000 Option 01
Digitizer Vertical Range 100mV SV 10V
Coupling DC
Offset OV
Acquire Acq Mode
Normal
TimeWin
100 J.Ls
Length 1024
HoldNext On
Trigger TrigMode Normal
Source CHA EXT INT
Measure Measure
On
Select Base-Top Amp
CG Mode Volts
Ampl 20 mV/div 0.2SV/div O.SV/divx
x 1 div x S divs S divs
Frequency 10 kHz
Performance Verification
L.
I
I