Calibration
1502C MTDR Service Manual
6–19
O
N
ac 0.000 ft
O
F
F
O
F
F
O
F
F
Figure 6–31: Waveform at 5 m
r
/div
8. Increase the DIST/DIV to 200 ft/div.
9. Increase the VERT SCALE to 5.00 m
r
.
10. Verify the the waveform is flat
"
one minor division after the incident step.
NOTE. If the instrument fails this check, refer to Driver/Sampler in the Circuit
Descriptions chapter and the Troubleshooting section of the Maintenance chapter.
Risetime Check
If the risetime is out of specification, it might be difficult to make accurate
short-distance measurements near the front panel and might affect the resolution of
the instrument.
1. Set the front-panel controls:
CABLE 50
W
terminator
NOISE FILTER 1 avg
VERT SCALE 500 m
r
DIST/DIV 0.1 ft/div
V
P
.99
O
F
F
O
N
ac
O
F
F
O
F
F
–0.316 ft
Figure 6–32: Incident Pulse at Center of Display
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
Need help?
General
