TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N
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3 MODES, SUB-MODES AND OPTIONS
following features have been realized in ST131:
THREE MODES: “FULL RANGE”, “BAND” and “DEMODULATION”.
FOUR SUB-MODES: “SCALE”, “AUTOMATIC ANALYSIS”, “MEMORY” and
“MEASUREMENTS”.
FOUR OPTIONS: “OSCILLOSCOPE”, “SPECTRAL SUBTRACTION”, “DIGIT” and “NON-
LINEAR JUNCTION DETECTOR” (only for ST131N).
3.1 “FULL RANGE” MODE
In general, this mode is intended for visual estimation of the signal occupancy in the full frequency
range and quick detection the signals with relatively strong level.
Entry in this mode is carried out automatically after selection of
the channel from the list of the channels in start MENU or by pressing
(except “RADIO 4–18 GHz” channel).
The large frequency range of the "RADIO 30-4400 MHz” channel is divided into two sub-ranges:
“30-4100 MHz” and “300-4400 MHz”. Switching between sub-ranges is performed by
and
buttons.
CONTEXT BUTTONS FUNCTIONS______________________________________________
All possible main and auxiliary context buttons in this mode for all channels are presented below.
Definition of the buttons can be different in each channel.
- selects the attenuator level (0-30 dB) of the ST131.UHF converter in the "RADIO 30-4400
MHz” channel. It is displayed on position 1, Figure 15.
- selects the displayed dynamic range of signal levels (30, 60 or 120 dB). It is displayed on
position 6, Figure 15.
- selects the pair of RJ-45 connector in the "WIRE" channels (see section 1.3.4). It is displayed
on position 1, Figure 15.
- selects the gain of the input amplifier for the main unit as well as automatic gain control
(AUTO).
- selects signal averaging (see section Annex 1).
- access to the "DIGIT" option in the "RADIO 30-4400 MHz" channel (see section 3.10) .
- access to the “SPECTRAL SUBTRACTION” option (see section 3.9) and the detailed pattern
(see section 3.4.1).
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