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 dB 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 |
±1.5% at 25°C with additional ±0.04% per °C |
| BNC Input |
1 VRMS or 0.2 VRMS switchable with crest factor of 5 |
| Impedance 1 V input: |
1 kohm in series with 10 µF |
| Impedance 0.2 V input: |
200 kohm in series with 10 µF |
| BNC Output |
Impedance: |
0.5 kohm in series with 100 µF |
| Load Impedance: |
>25 kohm |
| 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 |
