Tektronix 1503C, User Manual, Page: 53 / 128

Operator Tutorial
1503C MTDR User Manual
2–11
Set Ref ( Mode)
Horizontal Set Reference establishes the starting point at which the distance window
begins reading the distance to the cursor. If, for example, you have a 10-foot cable
leading to a patch panel, you could eliminate this jumper from your distance
readings.
1. Set the 1503C front-panel controls to:
CABLE Attach 10-ft cable
IMPEDANCE 93
NOISE FILTER 1 avg
VERT SCALE 0.00 dB (default)
DIST/DIV 1 ft/div (0.25 m)
PULSE WIDTH 2 ns (no terminator)
NOTE
. If the POWER was left on from the previous step, return the distance window
reading to 0.00 ft with the
n o
POSITION control.
O
F
F
O
F
F
O
F
F
O
N
ac 0.00 ft
Figure 2–17: Incident and Reflected Pulses with Cursor at 0.00 ft
2. Turn the NOISE FILTER control counterclockwise to HORZ SET REF. The
noise filter reading on the LCD will indicate set .
3. Adjust the
n o
POSITION control so the cursor is on the rising edge of the
reflected pulse. In this case, the distance window should read 10.0 ft.
HORZ SET REF