D5BT Series

Tunable Bandpass Filter,
Low Frequency, Digitally Controlled

D5BT K&L Tuner


Product Name: D5BT Series – Tunable Bandpass Filter, Low Frequency, Digitally Controlled


  • Digitally Controlled
  • Optional Internal Filter Providing 60 dB min attenuation out to 700 MHz
  • High Performance Cavity Design
  • Octave Tuning Ranges
  • Drive Voltages Include 24 VDC (standard), 12 VDC and
    110 VAC
  • Remote Interfaces Include GPIB (standard), RS-232
    and RS-422

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Product Specifications

K&L Model Bandpass
Frequency Range (MHz)  Insertion Loss at F0
Shape Factor
30 dB to 3 dB/
50 dB to 3 dB
D5BT-2/4-5-N/N-GRI-LP2 - 43.5 dB max.5%1.5:12.2:1 / 3.5:1
D5BT-4/8-5-N/N-GRI-LP4 - 83.0 dB max.5%1.5:12.2:1 / 3.5:1
D5BT-8/16-5-N/N-GRI-LP8 - 162.0 dB max.5%1.5:12.2:1 / 3.5:1
D5BT-16/32-5-N/N-GRI-LP16 - 322.0 dB max.5%1.5:12.2:1 / 3.5:1
FIlter TypeImpedanceRF Connectors 
Control InterfaceControl Power
5 Section Bandpass
50 OhmsType N Standard, SMA / TNC / BNC OptionalGPIB Standard, RS-232 / RS-422 / BCD Optional24 VDC Standard, 12 VDC / 110 VAC Optional

Digitally Controlled Filter Guide

FormatRS232 (serial)RS422 (serial)BCD (parallel)Binary (parallel)IEEE-488 (parallel)ARC171ARC234ThumbwheelEthernetUSB

* Non-standard longer lead time option

12-14 VDCQ
24-28 VDCR
110 VACS
220 VACT


• Automated Test and Measurement Facilities
• Trouble Shooting Co-location Environments
• Military Communications
• Wireless Communications


Defense Aerospace Communications GPS ATE Space



Featured Brand


K&L Microwave

Since 1971, we’ve aggressively invested in innovation to deliver interference mitigation products built to even the most exacting specifications. By taking control of the internal design and production processes, K&L Microwave can work collaboratively with customers, employing our high-quality standards and industry expertise to develop custom solutions across a full line of applications.

Our line of filters, duplexer, and subassemblies includes multiple topologies, including Ceramic, Lumped Element, Cavity, Waveguide, and Tunable Filters.

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