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17
Toner mode (SOLID and ALT)
In Toner mode, the KE890/895 sends signals to a line that can be detected by
the KE420 xDSL Probe. This makes it possible to trace individual lines even
under plaster. The two sound modes SOLID and ALT are available. Both are
activated by briey pressing the respective function key and indicated by their
respective LEDs.
Each of the two modes has three dierent search signal tones, which can
be selected via the Frequency key and switched through one after the other.
Both start with the rst frequency:
Mode Frequency 1 Frequency 2 Frequency 3
SOLID (constant tones) 1 kHz 1,9 kHz 577 Hz
ALT (alternating tones) 880 Hz / 1 kHz 1,9 kHz / 2,6 kHz 577 Hz pulsed
The currently active search tone is indicated by the color of the function LED
Frequency: red (F1), green (F2) and yellow (F3)
The search tones are output by the KE890/KE895 as square wave voltage
with ~12 V
SS
on the open, unloaded line. With low impedance loads, the out-
put voltage drops accordingly:
Base wave 1 kHz:
~ +12 dBm on high-impedance line
~ +5 dBm on 600 Ω
~ +4 dBm on 300 Ω
~ 0 dBm on 100 Ω
~ -5 dBm on 50 Ω
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