| Tuneable Band Pass Filter
The Tuneable Band Pass Filter Type 1621 is a variable
filter intended for use with the general purpose B&K
2511 Vibration Meter for narrow band frequency analysis of vibration
levels.
Frequency Range: 0.2 Hz to 20 kHz in 5 ranges
Pass Bandwidths: switchable : 3 % or 23 % (1/3 octave)
Attenuation at 1/2 and 2 x selected frequency : switchable 34 or 16 dB
Dynamic Range:
> 40 dB RMS with 3 % bandwidth between 0.2 Hz and 6 kHz
> 35 dB RMS with 3 % bandwidth between 6 kHz and 20 kHz
> 40 dB RMS with 2 % bandwidth between 0.2 Hz and 20 kHz
Accuracy of Indicated Frequency: qu± 1.5 % at 25 °C with
additional ± 0.04 % per °C
BNC Input: 1 V RMS or 0.2 V RMS switchable with crest factor of 5
Impedance 1 V input : 1 MΩ in series with 10 µF
Impedance 0.2 V input : 200 kΩ in series with 10 µF
BNC Output:
Impedance: 0.5 Ω in series with 100 µF
Load Impedance: > 25 kΩ
Gain: 0 dB ± 1 dB
| Hum and Noise: 3 % Bandwidth |
| Frequency |
0.2 Hz - 6 kHz |
6 kHz - 20 kHz |
| 1 V input |
10 mV |
18 mV |
| 0.2 V input |
2 mV |
3.6 mV |
| Hum and Noise: 23 % Bandwidth |
| Frequency |
0.2 Hz - 20 kHz |
| 1 V input |
10 mV |
| 0.2 V input |
2 mV |
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