Cellular 850

The Westell, formerly CSI, Cellular 850 cavity filters are available in full band A or B frequencies as well as factory tunable 1-3 MHz notched options. These passbands and notched filters are used to limit downlink out of band signal impedance when combined with a repeater in an in-building system.

Features & Benefits
  • Improves dynamic range
  • Mitigates out of band signals
Insertion Loss (dB) 3.5 dB
Ripple 1.4 dB
Input Power
Cellular A & B 5 W Max
Notch 10 W Max
Rejection 30 dB MIN
Impedance 50 Ohm
VSWR 1.35 : 1
Connectors N Female
Finish Black
Cellular A 14.17 x 7.09 x 2.56 in.
Cellular B 8.27 x 5.04 x 2.56 in.
Notch 9.6 x 1.57 x 3.46 in.
Operating Temperature 0° to +50° C
Model No./Frequencies
Model Number
Passband Filters
Cellular A CSI-FLTR-11NF5-836.5-874.5
Cellular B CSI-FLTR-14NF5-836.5/887
Notch Filter
Selectable, 1-3 MHz CSI-FLTR-CELL3NF10
Frequency Range
Passband Filters
Cellular A 824-849 & 869-880/890-891.5 MHz
Cellular B 824-849 & 880-894 MHz
Notch Filter
Selectable, 1-3 MHz 806-940 MHz



Data Sheet