Tektronix 2247A

Performance Check Procedure
CHECK—that the spacing of the time markers over any 2.5-division
interval within the center elght divisions does not deviate from the value
measured at the center 2.5 divisions by more than 0.12 division. Use
the fifth vertical graticule line as a starting point for the measurement
at the center 2.5 divisions. Exclude the first 1/4 division or 25 ns and
any portion of the sweep past the 100th magnified division.
Set SEC/DIV to S ns.
Set the Horizontal POSITION control to 12 o'clock and then align the
nearest time marker to the second vertical graticule line.
CHECK—that the tenth displayed time marker Is within 0.24 division
(left or right) of the tenth graticule line.
CHECK—that the spacing of the time markers over any two-division
Interval within the center eight divisions does not deviate from the value
measured at the center two divisions by more than 0.1 division.
Exclude the first 1/4 division or 25 ns and any portion of the sweep past
the 100th magnified division.
Repeat the timing and linearity checks for all SEC/DIV settings between
10 ns and 0.5 ms. Use the SEC/DIV and Time-Mark Generator X10
MAG settings given In Table 7-3.
Set:
Horizontal MODE A
SEC/DIV 2 ns (with X10
MAG on)
Set time-mark generator for 5 ns time markers.
Repeat the magnified timing accuracy and linearity checks for the A
Sweep at all magnified SEC/DIV settings.
Delay Time Jitter
Set:
X10 MAG Off
A SEC/DIV 1ms
Horizontal MODE ALT
SEC/DIV 0.5 ps
7-42 2247A Operators
:
4
Ee
E-3