Tunable Bandreject Filters 25 MHz to 2000 MHz Direct Readout Octave Tuning Digital and Manual Tuning Available Extended Passband High Power Application Custom Bandwidths Ruggedized Applications Calculating Number of Sections 1. Number of Sections 2. Series (TF) 3. Frequency Range, MHZ 4. Percent Bandwidth 3 dB BW and Designator 5. Connectors

Bandwidth Designator 3 dB /(blank) special /X Connectors Connector Type Designator BNC Female (1) B F F N Female N SMA Female S TNC Female (1) T

Overview Bandpass Bandreject Digital Tuners

Digital Filter Options

Lorch Microwave can provide a wide selection of tunable bandpass and bandreject options, including digitally controlled filters. Standard bandpass and bandreject tuners can be configured to provide digital frequency control. Tuning is accomplished by utilizing a servo-type stepping motor to drive the gear assembly.

A programmable microprocessor-based system is used. Many control logic options exist including serial, RS-232, RS-422, IEEE-488, and BCD.

Standard Cellular and PCS Tunable Bandreject Filters
Part No.	No. of Sections	Freq. Range (MHz)	Insert. Loss dB (Typ.)	Nominal Bandwidth	VSWR	Avg. Power (Watts)	Dial Acc.	Notch Inch (mm)	Length Inches (mm)	Width Inches (mm)	Width Inches (mm)
Cellular Bandpass
3NF-800/1000-S	3	800-1000	1	1%	1.5:1 TYP	50 W	±0.5%	50 DB	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
5NF-800/1000-S	5	800-1000	1	1%	1.5:1 TYP	50 W	±0.5%	75 DB	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
PCS Bandpass
3NF-1800/2200-S	3	1800-2200	1	1%	1.5:1 TYP	50 W	±0.5%	50 DB	6.57" (166.9)	2.0" (58.0)	2.0" (58.0)
5NF-1800/2200-S	5	1800-2200	1	1%	1.5:1 TYP	50 W	±0.5%	75 DB	9.86" (250.4)	2.0" (58.0)	2.0" (58.0)

Standard Tunable Reject Filters
Stock 3 Section Units	Insertion Loss dB (Typical)	3 dB BW (MHz)	40 dB BW min. (KHz)	Notch Depth (dB)	Length Inches (mm)	Width Inches (mm)	Height Inches (mm)
3NF-25/50-S	1.0	1-2.5	100	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-30/76-S	1.0	1-2.5	100	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-50/100-S	1.0	3-6	300	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-100/200-S	1.0	3-6	300	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-200/400-S	1.0	3-7	300	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-250/500-S	1.0	3-7	300	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-375/750-S	1.0	6-16	400	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-500/1000-S	1.0	6-16	400	50	6.6 (167.6)	5.4 (137.2)	2.8 (71.1)
3NF-1000/2000-S	1.0	9-24	400	50	5.2 (167.6)	2.9 (73.7)	2.8 (71.1)

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