9
To set the threshold as based on the sensitivity threshold, press "ZERO" while the message
"ZERO" is on. In the areas 3 and 4 zero values will be displayed.
"OSC" - Access to view oscillograms of the detected signal
"MODE"
•"Sens Level" - The sensitivity of the indication scale. Selection carried out by buttons "+ / -"
between the low (60 dB full scale) and high (30 dB full scale) sensitivity. Confirm the selection,
press the "3".The selected value is displayed in the item 8.
•"Freqmeter" - Setting the time priority between the measurement of the frequency of the signal
and digital identification protocols. The value of "1" is the lowest time priority of frequency.
•"Sound control" If “AUD” is selected, a demodulated signal from the amplitude detector will be
made audible. If “TONE” is selected, alternate tone beeps (clicks) will be audible in the in-built
speaker or headphones: the higher the signal magnitude, the more frequency of the clicks.
The minimum magnitude when sound monitoring is available, is about the four segment of the
scale.
4.2 Wire Line Scanning Analyser Channel
While in this channel, the device ensures the reception and displays of signals in conducting lines of
various purposes (power mains, telephone lines, lines of fire alarm and security alert, etc.) with voltages up
to 250V (DC or AC).
Connecting the ST 034 to the analyzed line makes through ST131AWL using a set of probes.
There are automatic and manual choices threshold, stop the scan, select the scan direction, as well as
subtraction mode panorama. Classification of signals of controlled conductive lines bases on the analysis
panorama, which displays the frequency spectrum components of the received signal and level for each of
them. When you stop scanning , it provides the ability to directly control the hearing of the received signal
with a choice of AM or FM demodulator.
4.2.1 Controls and indication while using the wire line scanning analyser
1Current frequency of the receiver
2Panorama
3Demodulation type
4Indication substract of panorama
5Scanning status: RUN/STOP changes direction of the scanning
(--> or <--)
6Threshold stop of the scanning
“MODЕ”
•Setting the demodulation type Two options are available, AM and FM.
•Settings the trehshold are Auto or manual.
Automatical definition of threshold set by default. Calculation of the threshold value is based on
several measurements made over the entire range in the first time after the channel selection.
Manual threshold setting carries out by buttons “+/-“. Range of setting is from 10 to 70dB with step
2dB Confirm the selection carries out by pressing the button “1”
