Notch Filters for CATV / MATV / RF / FM Systems

Fixed and Tunable Models (0.8 to 1000 MHz)

Select A Category ... Off-Air/RF FM CATV General Description Table & Graphs Specifying Your Notch

Overview: Notches and Traps

General Description

• TLE offers single frequency notch filters ranging from 0.8 to 1000 MHz
• Notch filters are designed to attenuate a signal at one center frequency (Fo) with minimal loss to neighbouring signals, and, provide the bandwidth needed to pass all desired signals.
• Notch filters are generally used to attenuate interfering signals, and provide additional selectivity in receiving systems.
• Models are available with fixed center frequency (Fo), or with frequqncy tuneable Fo.
• Notch depth (attenuation) can be specified from 10 to 70 dB.
• Notches can be combined for greater attenuation, notch width, and frequency stability.
• Notch filters are recommended for indoor operation, outdoor operation optional
• A Custom notch can be specified for the required centre frequency, selectivity, attenuation level, bandwidth, impedance and connectors.

CATV Notches

• Available for a center frequency from 5 to 999 MHz
• CATV return path models have Fo and bandwidth from 5 to 60 MHz
• CATV forward path models have Fo from 50 to 999 MHz, and bandwidth 5 to 750/870/1000 MHz
• Filter impedance is 75 ohms with F-type connectors
• FM Notch models for CATV include fixed and tuneable single notches with 5 to 750/870 MHz bandwidth
• FM multiple notch for FM and ch.A5(95)-A1(99) deletion from CATV Spectrum is available: customized for exact spectrum deletion and to preserve signals

FM Notches

• Center frequency can be specified from 88 to 108 MHz
• Sharp, ultrasharp, fixed frequency and tuneable frequency models are available
• Bandwidth for VHF/FM (10-250 MHz) or VHF/UHF systems (5/400-800 MHz)
• Filter Impedance is available for 75 ohms (F, BNC) or 50 ohms (BNC, N)
• Multiple notch models for FM band deletion are available: customized for exact spectrum deletion and to preserve signals, e.g., attenuate 88-108 MHz, pass 109.25 and above (Marine Navigation band)
• Custom-made FM multiple notches for specified FM carriers are also available

Off-Air Antenna Notches

• Off-air notches can have centre frequency 40 to 800 MHz
• Used to selectively attenuate desired frequencies to improve reception
• Bandwidth for VHF 40-250 MHz or VHF/UHF 40-250/470-800 MHz, or 40 to 800 MHz
• Models are available for 75 ohms (F, BNC) or 50 ohms (BNC, N)
• Indoor and outdoor enclosures available

RF Notch Filters (Custom): 0.8 to 1000 MHz, 75 or 50 ohms

• RF notch center frequency can be specified from 0.3 to 900 MHz
• Filter port impedance can be 75 ohms or 50 ohms (user-specified)
• Available with a variety of connector options: F, BNC, SMA, or N
• Details RF notch specifications - please refer to CATV and Off-Air TV/FM models
• Custom multiple notches for multi-frequency attenuation (seperate or contiguous) available