Digitally-Controlled Tunable Products

K&L Microwave offers a variety of Tunable Filter Products to satisfy a broad range of filtering applications. Tunable Bandpass and Bandreject filters provide the best solution for pre-tuning the desired signals while rejecting the interfering signals. The method of tuning can be either mechanical via a tuning knob mounted on the front of the filter, or electro-mechanical via an optional remote digital interface such as GPIB, RS-232, RS-422, BCD, ARC171, ARC234, Ethernet, USB or “Thumbwheel” panel mount. Manually tuned filters have a separate product section on this site. Digitally-Controlled Tunable Filter Products are shown below.

Control Logic Key/Code:

  • A = RS232 (serial)
  • B = RS422 (serial)
  • C = SDLC (serial)
  • E = BCD (parallel)
  • F = Binary (parallel)
  • G = IEEE-488 (parallel)
  • H = ARC171
  • J = ARC234
  • K = Thumbwheel
  • L = Ethernet
  • M = USB

Drive Voltage Key/Code:

  • Q = 12-14 VDC
  • R = 24-28 VDC
  • S = 110 VAC
  • T = 220 VAC

Infrared Sensor Key/Code: I for Infrared Sensor

Digital Interface Example: GRI means IEEE-488, 24-28 VDC, and Infrared Sensor

Tunable filters can be offered to cover frequencies as low as 800KHz, or as high as 18GHz. K&L Microwave offers Tunable Filters from stock, which cover many popular frequencies for applications such as military communications and wireless bands. Depending on the specific application, the tuning ranges can exceed an octave.

LTE/WiFi Test Box - Adjustable Bandwidth Tunable (700MHz - 6000MHz)

Product

K&L has developed and is now shipping an LTE/WiFi testing solution digitally-controlled filtering system that can tune a bandpass filter anywhere in the 700 MHz to 6000 MHz range with continuously adjustable bandwidth. View latest video to see in operation.

CTB Series - High Frequency Tunable Bandpass Filters

Product

Tunable Ranges Up To 8 GHz
Bandwidths 1% to 5% of Tuned Center Frequency
Digital Control Offered in Various Inputs,
including GPIB (standard), RS-232, RS-422, and USB
Custom Interfaces Available

MFA R&D Tunable - Adjustable Bandwidth Tunable (700MHz-1000MHz)

Product

Allows passband centered at any frequency over tuning range while adding the capability to vary passband width. Upon input of desired frequency and bandwidth, tunes center frequency and adjusts bandwidth to provide a custom filtering solution on demand. Suitable for LTE and other test applications. The LTE/WiFi Test Box is the latest addition to this product family.

Digital BT Series - Digitally-Controlled Tunable Bandpass Filters

Product

Nine Frequency Range Options (See Data Sheet)
Digital Control / Automated Operation Via Remote Interfaces
GPIB (IEE-488) Standard, RS-232, RS-422, and BCD Available
Drive Voltages 24 VDC (standard), 12 VDC, and 110 VAC
Contact Factory for Custom Requirements
D5BT-250/500-5-N/N-GRI - 1 unit available from stock.

Digital TNF Series - Digitally-Controlled 3-Section Notch Filters

Product

Seven 3-Section Frequency Range Options (See Data Sheet)
Digital Control / Automated Operation Via Remote Interfaces
GPIB (IEE-488) Standard, RS-232, RS-422, and BCD Available
Drive Voltages 24 VDC (standard), 12 VDC, and 110 VAC
Contact Factory for Custom Requirements

Digital TNF Series - Digitally-Controlled Tunable Notches (for LTE)

Product

Nineteen 5-Section Frequency Ranges (See Data Sheet)
Digital Control / Automated Operation Via Remote Interfaces
GPIB (IEE-488) Standard, RS-232, RS-422, and BCD Available
Drive Voltages 24 VDC (standard), 12 VDC, 110 VAC, 220 VAC
Contact Factory for Custom Requirements

Digital BT Series - Low Frequency Digitally-Controlled Tunables

Product

Digital Control / Four Available Octave Tuning Ranges
Optional Lowpass Filter Provides 60 dB min to 700 MHz
High Performance Cavity Design
Drive Voltages 24 VDC (standard), 12 VDC, and 110 VAC
Interfaces Include GPIB (standard), RS-232, and RS-422

Multi-Octave Tunables - Multi-Octave Tunable Solutions

Product

Tunable Ranges Cover from 1MHz to 4GHz
Bandwidths 1% to 5% of Tuned Center Frequency
Digital Control Offered in Various Inputs,
including USB, Ethernet, IEEE-488, and RS-232
Custom Interfaces Available

D2HBTM-85/165-0.5-N/N-BRI - VHF Autotuned Filter

Product

Narrow 3 dB BW / High "Q", Low Loss
Digitally Controlled
Drive Voltages Include 12 VDC, 24 VDC, and 110 VAC
Ruggedized Package Designed for Mobile Environments
See List of Available Remote Interfaces

D3HBTM-100/164-1-N/N-ERI - VHF Ruggedized Bandpass

Product

High "Q" / VHF frequency band 100 to 164 MHz.
Digitally-Controlled / Remote BCD Interface
When configured with a VHF Transceiver,
provides filtering solutions to eliminate
co-location interference.

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