Notch Filters for CATV / MATV / RF / FM Systems
Fixed and Tunable Models (0.8 to 1000 MHz)
Example Models: Table and Graphs
| Example Models | Selectivity 3dB BW | Passband (MHz) | Application |
| CR7-4.5 HQ | ± 0.25 MHz | 0 to 40 | Audio notch - prevents video interference on audio. Install on modulator Video port (see graph) |
| CR7-Fo HQ Sub | ± 0.5 MHz | DC-60 MHz | Notch in the CATV Return Path (see graph) |
| CR7-ch.12s | ± 1.5 MHz | 0 to 750 | Adjustable VHF notch - attenuates VHF ch.12 audio level to prevent adjacent ch. 13 interference |
| HQ3-(81.75)U | ± 1.5 MHz | 0-250, 470-860 | 300 ohms, VHF notch - rejects ch.5 audio, pass VHF & UHF frequencies |
| CR7-94.1 HQ (25) | ± 1.0 MHz | 0-250 or 20-860 | FM notch - 25 dB rejection - 94.1 MHz. Attenuate strong station to receive weak station (see graph) |
| VR7-FM HT | ± 0.35 MHz | 5-250 MHz | Test equipment applications and FM stations (see graph) |
| VR7-HQT | ± 0.15 MHz | 5-200 MHz | Test equipment applications and FM station (see graph) |
| CR7E-450/452 HQD | ± 8 MHz | 5-1000 MHz | Remove any potential interference at centre frequency for test applications. (see graph) |
| CR7E-999 | ± 8 MHz | 5-1000 MHz | Remove any potential interference at centre frequency for digital signal insertion. (see graph) |
| CR7-78P HQ | ± 3.0 MHz | 0 to 750 or 900 | Negative trap - Trap CATV hyperband ch.78 (Fo = 547.25 MHz). Impairs viewing of channel. (see graph) |
| CR7-(Fo)-UHF HT | ± 2.0 MHz | 5 to 870 MHz | Attenuate UHF frequency carrier level (see graph) |
| VR7-UHF HT | ± 2.0-4.5 MHz | 5 to 870 MHz |
Cover the UHF band in two ranges
(see graph 1) (see graph 2) |