Omicron HGT1 User Manual

OMICRON 41
Technical data
10 Technical data
FFT specifications
The HGT1 uses zoom FFT with the following parameters:
• FFT size: 512 samples
• FFT resolution: 142 bins
• FFT repetition rate: 187,5 Hz (one FFT per 5.3 ms).
The results of the FFT shown on the HGT1’s screen are updated every 50 ms by averaging the
individual FFT results.
Figure 10-1: Filter selectivity for 100 Hz range
Table 10-1: HGT1 input
Input impedance
selection
Input
impedance
Voltage Accuracy
(15 Hz…20kHz)
Residual noise
(100 Hz mode)
1 kΩ 1kΩ 25V
RMS
+0.5 %; -1.0 % < 10 uV
1 kΩ + 1 kΩ 2 kΩ 50 V
RMS
+0.5 %; -1.0 %
HIGH Z 200 kΩ 25 V
RMS
+0.5 %; -1.0 %
Table 10-2: FFT parameters for 100 Hz and 400 Hz frequency range selection
Frequency range selection 100 Hz 400 Hz
Frequency range 104 Hz 414 Hz
Frequency resolution 0.73 Hz 2.92 Hz
Window size 1.37 s 342 ms
Overlapping 99.6 % 98.4 %
Offset from output frequency in Hz
Attenuation in dB

Omicron HGT1 Specifications

General

Brand	Omicron
Model	HGT1
Category	Test Equipment
Language	English