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Features |
- 21 Models Cover from 10 to 500 MHz
- High rejection at notch >25 dB
- Wide pass band, up to 1.0 GHz
- Absorptive filter topology
- Multi-turn trimmers easily tune.
- Extremely narrow notch <0.7%
- Small size
- Rugged case and connectors
- Low Cost
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Applications |
Notch filters are useful in situations where a selected frequency must be attenuated while passing all others. Notch filters are commonly used to:
1. Increase dynamic range of spectrum analyzers.
2. Suppressing either the video or audio carrier in a TV signal without disturbing the other carrier.
3. Notching components of a complex signal that require that the impedance of the notch remains close to 50 ohms
4. Notching a close by frequency.
Although a small unit physically, the TNF400 offers notch performance of substantially larger cavity type or helical resonator filters. An additional benefit of the TNF400 is the fact that the notch is easily tuneable. |
Application Notes |
The use of notch filters to enhance spectrum analyzer measurements is discussed in the application note:
"Spectrum Analyzer measurements"
This note is available for down loading from this website in PDF format. |
Description |
The TNF400 series of notch filters are of the absorptive variety. This means that power not passed by the filter is absorbed in the filter rather than being reflected back to the source.
Two adjustments are provided to set the FREQUENCY and PEAK of the notch. Both of these adjustments are multi-turn trimmers for ease of tuning.
The TNF400 is contained in a heavy-duty nickel plated brass enclosure providing excellent shielding. Stainless steel hardware and nickel plating prevent corrosion from dissimilar metal action. |
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Description-continued |
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Notch Performance |
The following graph illustrates the narrowness of the TNF400 notch. For an enlarged view please click on the graph.
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Quality |
To insure that high quality is maintained each unit is thoroughly inspected both mechanically and electrically. All units are aged and then retested to insure superior stability over the lifetime of the instruments. |
Availability |
These units are normally stock items: 1 week delivery. Special orders or large quantities usually require 2-4 weeks. |
Specifications |
Please refer to next page for detailed specifications. |
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SPECIFICATIONS-cont |
Ordering Information |
| Select the frequency range desired from the table below. The correct part number of the filter will be in the left hand column. Add the correct suffix for the type of connectors desired from Options above. Call the factory or authorized representative to place order. |
Model No. |
Tuning Range |
Useable Range |
TNF411-1xx | 10-13 MHz | 1-200 MHz |
TNF411-2xx | 12-15 MHz | 1-200 MHz |
TNF411-3xx | 15-19 MHz | 1-200 MHz |
TNF411-4xx | 18-23 MHz | 1-200 MHz |
TNF411-5xx | 23-29 MHz | 1-200 MHz |
TNF411-6xx | 29-36 MHz | 1-250 MHz |
TNF411-7xx | 35-45 MHz | 1-250 MHz |
TNF411-8xx | 45-50 MHz | 1-300 MHz |
TNF412-1xx | 50-60 MHz | 5-500 MHz |
TNF412-2xx | 60-75 MHz | 5-500 MHz |
TNF412-3xx | 75-88 MHz | 5-500 MHz |
TNF412-4xx | 88-108 MHz | 5-500 MHz |
TNF412-5xx | 108-135 MHz | 5-500 MHz |
TNF412-6xx | 135-155 MHz | 5-600 MHz |
TNF413-1xx | 150-175 MHz | 20-1000 MHz |
TNF413-2xx | 175-210 MHz | 20-1000 MHz |
TNF413-3xx | 210-260 MHz | 20-1000 MHz |
TNF413-4xx | 260-310 MHz | 20-1000 MHz |
TNF413-5xx | 300-375 MHz | 20-1000 MHz |
TNF413-6xx | 375-450 MHz | 20-1000 MHz |
TNF413-7xx | 425-500 MHz | 20-1000 MHz |
Outline Drawing |
| Click on drawing for enlarged view
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website: eagle-1st.com | | email: use contact page |
Phone: 928 204-2597 | | PO Box 579 |
fax: 928 204-2568 | ClarkDale, AZ 86324 |
08 Dec 2009 css-a ΥΤΦ-8 | | |
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css-a ΥΤΦ-8 Crea4DSP2 4.7 05 Nov 2009 | 14203000 | 11/21/2009 |
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