MATV Bandstops
CR7- Series: Single Channel Bandstop
CR7-CH.(#)HT UHF Series: Single Adjacent Channel Bandstop
Summary: Bandstop Products
Assistance: Configuring the appropriate bandstop
CR7-Series: Semi-Adjacent Bandstop (any channel 5 to 800 MHz)
CR7-UHF, VHF , Double, Outdoor Dim (VHF) 3.6"L x 2.5"H x 3.2"W< Dim (UHF) 3.6"L x 1.5"H x 3.2"W
CR7-ch.(#) - Single Channel Bandstop
- Rejection: TV channel (NTSC or ATSC)or RF band- 6-8 MHz stopband
- Passband: pass all signals, except adjacent channels, 3dB BW 24 MHz Fo
- Example: Attenuate ch.62 by 20 dB, pass chs 60 and 64. (click for graph)
- Rejection level: specify 20 dB or 30 dB (custom >50 dB )
- Stopband:20dB attenuation (6 MHz) - low impact on picture quality
- Application: attenuate the channel overloading preamp
- Available Channels: VHF, UHF, and CATV or RF band (2 to 10 MHz)
- Available for: FM, and Pager bands (more info below)
- Operating Bandwidth: 5 - 230 MHz, or, 40 - 860 MHz
- Passband loss: < 1dB ± .5 dB
- Connectors: 75 ohms, F-type (50 ohms optional)
- Custom features: click here for details
CR7-ch. Single Channel Bandstop PDF Data SheetCR7-HT Series: Adjacent Friendly UHF Bandstop or Sharp Notch
CR7-Fo HT or VR7-Fo HT, CR7D-ch.# HT, CR7T-ch.# HT,
CR7-HT series Outdoor
Adjacent Friendly Notch and Bandstops Dim: 7"L x 6.5"H x 3.5"W
CR7-ch.(#)HT - UHF Bandstop or Sharp Notch (300 to 900 MHz)
- Availble as UHF TV channel bandstop (NTSC or ATSC) or Sharp Notch (15 to 55 dB) or RF bandstop - 2-10 MHz stopband
- High selectivity - designed for UHF adjacent channel interference
- Bandwidth: 40 to 800 MHz for off-air TV system, or 5 to 1000 MHz CATV/RF systems
- Example: Attenuate ch.51 by 20 dB, pass chs 52. (see pdf data sheet for sample graphs)
- Rejection level: specify 20 dB or 40 dB
- Stopband:20dB attenuation (6 MHz) - low impact on picture quality
- Application: attenuate the channel overloading preamp
- Available Channels: UHF, CATV Hyperband, RF 300 to 900 MHz
- Available with 2, 4 or 6 Helical Notch traps
- Passband loss: < 1dB ± .5 dB
- Connectors: 75 ohms, F-type (option 50 ohms BNC or N)
- Custom features: click here for details
Summary: MATV Traps & Bandstop Filters
CR7-series - antenna bandstop filters - are intended for non-adjacent operation
CR7-ch.FM Series bandstop for 88 - 108 MHz
TV/FM Antenna bandstops
CR7-FM bandstops Dim FM 20 dB 3.6"L x 2.5"H x 3.2"W< Dim FM 40dB 3.6"L x 1.5"H x 3.2"W
Prevent FM broadcast interference on off-air TV reception
- Attenuation:.............................................. 20, 30dB
- Custom Attenuation: ..............specify from 15 to 75 dB
- Stopband ............................................ 88 - 108 MHz
- Standard CR7- FM ........................ does not pass ch.6
- "Narrowed-FM bandstop" - CR7-FM (92-108 MHz) - passes ch.6
- Click for graph of FM bandstop
- Indoor (CR7) or outdoor (CR7X) housing
- Order Info: Example 1 CR7-FM-20 (20dB attenuation - indoor)
- Order Info: Example 2 CR7X-FM-30 (30dB attenuation - outdoor)
CR7- Pagers ( Fs1/Fs2)
Pager bandstops
CR7W-Pager 120-174 bandstop
Dim FM 20 dB 7"L x 5"H x 3.5"W< Dim FM 40dB 3.6"L x 1.5"H x 3.2"W
Block radio communications services (pager band) from entering TV system
- Stopband: < 20 MHz wide - see bandstop CR7-ch.140/160
- Stopband: > 20 MHz wide - see bandstop CR7W- 120/174
- Custom stopband: specify Fs1 & Fs2 (within 120 to 174 MHz) *
- Attenuation: ......................................... > 40 dB typical
- Passband: ............ VHF only or VHF-UHF (40 to 860 MHz)
- Housing: ............................................ Indoor or outdoor
* Fs1 and Fs2 are lower and upper stopband edges, respectively.
CR7-2ch.(#s), CR7-3ch.(#s)
Multiple bandstops ( 2 and 3 channels )
Bandstops for two, or three, different channels in one enclosure.
- Stopband rejection: ................................ 20dB to 30dB
- Passband ... VHF (40-250 MHz) or VHF-UHF (40 to 860 MHz)
- Passband ...... all frequencies, except adjacent channels
- Passband loss ................................................. < 2 dB
- Channels available: VHF, FM, UHF (VHF and UHF channels in same enclosure
- is not available)
- Operation .......................................... Indoor or outdoor
Example:
- CR7-3ch.5,9,FM - attenuates 3 strong local off-air signals: chs 5, 9, and FM band;
- CR7-2ch.19,25 - attenuates 2 strong local UHF chs 19 and 25.
BR7-(#s) LQ
Multi-Channel Bandstop
Custom built multiple channel band-stops
- Available in one, or more, 1.75" x 19" enclosures
- Up to 5 channels per enclosure
- Semi-adjacent applications - see Multiple channel Elimination Filter for adjacent bandstops
- VHF and UHF channels can be mixed in one enclosure.
CR3-ch. ( # )
300 ohms antenna traps
300 ohms VHF & UHF bandstops (non-adjacent skirt).
- Available with 20dB to 25dB attenuation.
- Weatherized housing for antenna mount, or, indoor housing
- 300 ohms impedance with screw terminals
- Passband:40-230 MHz or 40-870 MHz. Passband loss: 2 dB
Assistance: Bandstop Selection / Custom Bandstop
To provide you with the bandstop filter you need, please specify (see fig.1) ...
- Stopband channel or frequency (Fs1 & Fs2)
- Closest frequencies (or channels) to pass: least loss, or -3dB, - Fc1 & Fc2
- Operating Bandwidth: Fb & Fs (e.g., FM only, or 40 to 860 MHz)
- Acceptable Passband loss: 1dB typical
- Attenuation (in dB): 20 dB standard
- Connectors / Impedance: type F / 75 ohms
- Details of application - advise us of your specific requirements
Custom Options
- Connectors (impedance) : type F or BNC (75 ohms); BNC ( 50 ohms); screw terminals (300 ohms)
- Custom Single channel stopband: specify from 4 to 10 MHz
- Bandstop Bandwidth: specify Fs1 and Fs2 - wide stopband - click for CR7W (multi-channel bandstops)
- Attenuation: specify level - from 10 dB to 60 dB