AEA Technology 20TDR, Basic Manual

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Figure 2-9
In figure 2-9 both cursors are enabled. The top cursor line will show the distance and impedance
for CRSR2 as that was the last cursor key pressed or “Active” cursor. The bottom cursor line will
show the difference in distance and impedance from CRSR1’s position to CRSR2’s position.
NOTE: When the differential reading from the active cursor is from left-to-right (going away from
the TDR) the distance reading will be positive. When the differential reading from the active
cursor is from right-to-left (going toward the TDR) the distance reading will be negative. The
impedance differential may be positive or negative depending on the absolute readings at the
cursors
The key is activated when pressed and the green LED is lit. A Tone menu will be
presented in the LCD as shown in Figure 2-10. Use the ▲▼ keys to select the tone frequency
desired and the
◄►
keys to select having the tone steady or warbled. Items with a frequency
shown will cause the TDR to generate that frequency on the cable. Standard inductive amplifiers
(Probes) will pick up the tone to ID the cable or cable pair. If “Pocket Toners” are selected the
TDR will generate the DC voltage required to turn on their tone attachment at the far end of the
cable.
Figure 2-10
NOTES: 1. Toner should be used on battery power only. Use with the AC charger
connected will cause 50/60Hz interfere with the tone frequencies.
2. When the Tone feature is active the TDR measurement will not be active.
3. When the Tone feature is active the Battery Saver time-out will be
suspended to prevent automatic turn-off of the TDR.