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Operator Tutorial
1502C MTDR User Manual
2–23
You can probably see how this function is useful for monitoring lines for
changes over a period of time, or for intermittent conditions. For example:
H A coastal phone line only has problems during high tide. Overnight
monitoring reveals water in the line during the high tide period.
H A data communications line is monitored for an intermittent short. Three
days of monitoring reveals the shorts occur only during the hours of
darkness. Rodents are found in the cable ducts.
H A cable becomes defective only during daytime hours. Monitoring reveals
the line length increases (sags) during the heat of the day, shorting out on a
tree limb. During the night, the cable cools, tightens, and is no longer
shorted on the tree limb.
18. To exit Max Hold, access the Acquisition Control Menu again, turn off Max
Hold, and push MENU repeatedly until the instrument returns to normal
operation.
1. Set the 1502C front-panel controls to:
CABLE Attach 3-ft cable
NOISE FILTER 1 avg
VERT SCALE 500 mr (default)
DIST/DIV 1 ft/div (0.25 m)
2. Pull POWER on.
3. Press MENU to access the Main Menu.
4. Using the
n
o
POSITION control, scroll down to Setup Menu.
5. Press MENU to accept this selection.
6. Scroll down to Acquisition Control Menu.
7. Press MENU to accept this selection.
8. Scroll down to Pulse is: On.
9. Press MENU to toggle this selection. It should now read Pulse is: Off.
10. Press MENU repeatedly until the instrument returns to normal operation
mode.
Pulse On / Off