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TM30 User Manual v. X1.0
7.8.2 Audio freq mode
Task: Monitor audio frequencies of various objects.
-
Use
Audio freq
mode to monitor audio frequencies up to 10kHz without galvanic
contact to the object, e.g. to wires.
-
The monitored audio signal level must be relatively high and receiver nose must
be taken as close to the target object as possible.
-
From twisted pairs signal usually can’t be heard unless receiver nose can be
inserted inside the wire loops.
-
Audio freq
mode can be used to monitor external fields generated by electric or
electronic appliances.
7.8.3 High freq mode
Task: Monitor high frequencies on wires and terminals.
-
Use
High freq
mode to monitor frequencies above 10kHz, such as DSL signals
without galvanic contact to the object, e.g. on wires and terminals.
-
From twisted data pairs signal usually can’t be heard unless receiver nose can be
placed very close to a single wire.
8. Technical data, maintenance and service
8.1. Technical data
Transmitter
TMT30
DC voltage metering
-600...+600V, ±2% or ±0.5V
DC voltage metering
RMS 0...400V, ±2% or ±1V, f<5kHz
Frequency metering
0...5MHz, ±0.1% or ±2Hz
Tracing signal
125kHz sinusoidal, 270Hz AM
Tracing signal level
11.9Vpp, 2.9Vrms
Max. output current
26mArms
Output impedance
115Ω @ 125kHz
DSLAM-test frequencies
According to ITU-T G.992.1 Annex A
DSLAM-test method
According ITU-T G.994.1
DSLAM-test level
4.1Vpp open loop, 1.8Vpp to 100Ω
Meter modes impedance
420kΩ @ 50Hz
Trace modes impedance
105kΩ @ 50Hz
Indicators
2x16-character LCD display with backlight
Batteries
6pcs, 1.5V IEC LR6 alkaline batteries (or similar NiMH cells),
max. battery voltage 15V, low bat warning at approx. 6.5V
