FL4

Four Pole Bessel Filter

Dagan

The FL4 Four Pole Bessel Filter is a General purpose, high cut (low pass) filter.  It's Bessel filter characteristics are ideal for pulse-type data acquisition and analysis.  
Also available: FL8 Eight Pole Bessel Filter providing the same features, with a sharper Cut-off at the selected bandwith.  

Features  







 

 

   12 filter settings
   3 gain settings
   Selectable signal coupling  
   Available phase inversion  
   Low noise, external power supply  

 

Applications 

          
   Patch Clamp Recording  
                         Removal of background noise from pulse data                 Turn-key signal conditioning  
 

Specifications

Filter Settings (Hz) 

20, 50, 100, 200, 500, 1 k, 2k, 5k,10k, 20k, 50k, 100k  

Impedance

Input: 1MOhm; Output:  560Ohm  

Gain Settings

1,10,100  

Size 

 7.3" wide, 2.6" high, 9.7" deep

Coupling

AC, DC, DC with Offset (7V)  

Power

For 230VAC external power supply PS-1 is available (order separately).  

Phase

Normal, Invert 

Telegraph

Optional Telegraph (T option) provides DC level via back panel BNC representing filter setting encoded at 400mV/step.

 

 

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