Tektronix 7B70 Time Base Instruction Manual page 63

Performance Check/Calibration-7670 (SN 6205000 and Up)
25. Check Sweep Timing Accuracy
a. Set MAGNIFIER to X I . Using the control settings
given in Table 5-7, check that sweep timing accuracy over
the center eight divisions of the display i s within the
allowable limits.
TABLE 5-7
Error
0.02 ps 20 ns
.05 u s 50 ns
2 s k0.24 div
5 s 5 s
.I ms
.2 ms
.5 ms
over the center eight divisions. Adjust Volts/Div, B Inten-
sity, and triggering for a stable display.
TABLE 5-8
.I ms
.I ms
.5 ms
7670
TIMEIDIV
-02 ps
.05 p s
. I ps
.2 ps
.5 us
1
2
1
k0.16 div
26. Check Magnified Sweep Timing
a. CHECK-With the MAGNIFIER
set
to X10, use the
control settings given in Table 5-8 t o check timing accuracy
290 1
Markers
10 ns
I
5 ns
I I o n s
1
20 ns
50 ns
.1ms
)
l o p s
I s
2 s
5 s
b. Reset the MAGNIFIER t o X I . Disconnect the time-
mark generator.
1
.2 ms
Scans by ArtekMedia
O 2006
Markers/
Div
I cycle15 div
1
1
1
1
2
1
10 ps
.I s
.I s
.5 s
Allowable
Error
0.1 3 divl5 div
k0.2 div
.5 ms
1
2
1
50 us
k0.28 div