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4.2 HW_SET Menu
4.2.1
BANDWIDTH
Switches the bandwidth range: 0.5 - 6 MHz,
3.5 - 6 MHz, 0.5 - 12 MHz, 3.5 - 12 MHz,
0.5 - 25 MHz, 3.5 - 25 MHz, 0.5 – 50 MHz,
3.5 – 50 MHz, 0.5 - 100 MHz, 3.5 - 100 MHz,
0.5 – 200 MHz, 3.5 – 200 MHz.
Note: Bandwidth is a combination of analog
pass band and FIR filters.
4.2.2
AVERAGING
Switches the averaging function of digital signal processing – the resulting displayed
signal amplitude is equal to the average amplitude of 2, 4, 8, 16, 32 or 64
consecutive signals.
Note: Averaging function is applied to limited A-Scan range (intended mainly for
EMAT). At the RANGE over approx. 250 mm (for longitudinal wave in steel),
the rest of the signal is not averaged – this is indicated by changing the
RANGE indicator colour to red.
4.2.3
DETECTOR
Switches the detector modes:
- FULL W (rectified full-wave);
- NEG HW (rectified negative half-wave);
- POS HW (rectified positive half-wave).
4.2.4
TR MODE
Switches the Transmitter/Receiver modes – for details see 4.1.4:
- SINGLE (for single element probe);
- DUAL (for dual element probe – T/R);
- DUAL+ExtAmp (for special dual element probe with built-in preamplifier);
- EMAT (for special EMAT probe with Electro-Magnetic Acoustic Transducer).
4.2.5
P.WIDTH
Adjustment of the pulse width, in relation to the pulse frequency (P.FREQ).