KR Electronics, Inc. KR Electronics www.krfilters.com General Description Features • 40.92 MHz Center Frequency • Group Delay Equalized • Surface Mount Package • 50 Ω Source and Load KR 2821 is a 40.92 MHz surface mount bandpass filter. The filter has a minimum 1 dB bandwidth of 8 MHz. Other passband frequencies are available. Please consult the factory. Typical Performance Passband Amplitude & Group Delay Overall Response (1 dB/div and 10 nsec/div) (10 dB/div) 12 Mar 2008 09:33:28 CH1 CH3 S31 S31 LOG DEL 1 dB/ 10 ns/ 12 Mar 2008 09:34:02 REF -3 dB REF 200 ns CH2 S31 LOG 10 dB/ REF 0 dB Cor Smo Cor CENTER START 36 . 920 000 MHz KR Electronics, Inc. 91 Avenel Street Avenel, NJ 07001 © 2008, KR Electronics, Inc. STOP 44 . 920 000 40 . 920 000 MHz SPAN 81 . 820 000 MHz MHz Web Email Phone Fax www.krfilters.com [email protected] (732) 636-1900 (732) 636-1982 Page 1 KR Electronics, Inc. www.krfilters.com KR Electronics 2821 Specifications Parameter Specification Filter type Bandpass Center Frequency 40.92 MHz Insertion Loss < 6.5 dB ( 4.5 dB typical) Attenuation at 36.92 MHz < 1 dB Attenuation at 44.92 MHz < 1 dB Attenuation at 32.80 MHz > 40 dB Attenuation at 49.80 MHz > 40 dB Group Delay Variation 36.92 to 44.92 MHz < 10 nsec 50 Ω Source and Load Physical Dimensions Notes: 1. Surface mount package — Metal cover, open frame 2. Dimensions in inches 3. Maximum reflow temperature 209° C for 10 seconds maximum 4. If boards are cleaned after installation, units must be completely dried KR Electronics, Inc. 91 Avenel Street Avenel, NJ 07001 © 2008, KR Electronics, Inc. Web Email Phone Fax www.krfilters.com [email protected] (732) 636-1900 (732) 636-1982 Page 2