SATELLITE IF CHANNEL FILTERS Features • Tight amplitude and group delay specifications • Consistent 6 dB Insertion Loss across range • Impedance: 75 Ω • Geometrically symmetric response • Remote filter identification • Passband return loss: > 15 dB A range of bandpass filters for use in 70 MHz I.F. stages of satellite links. Designed to meet the tight amplitude and group delay characteristics necessary for close channel separation as specified in the Eutelsat, Intelsat, Arabsat and Astra templates. A particular feature is the passive logic array which can be interrogated electronically to detect the presence and type of filter. Other templates and different I.F. frequencies considered on request. Note: These items are NOT aqueous washable Table 1 – Amplitude See over FB282 FB281 FB296 FB295 FB294 FB552 FB404 FB1037 – Eutelsat Full Transponder – Eutelsat Half Transponder – Intelsat 17.5 MHz Carrier – Intelsat 20 MHz Carrier – Intelsat 30 MHz Carrier – Arabsat 32 MHz Carrier – Astra – Eutelsat 33 MHz Table 2 – Group delay See over FB282 FB281 FB296 FB295 FB294 FB552 FB404 – Eutelsat Full Transponder – Eutelsat Half Transponder – Intelsat 17.5 MHz Carrier – Intelsat 20 MHz Carrier – Intelsat 30 MHz Carrier – Arabsat 32 MHz Carrier – Astra FB1037 – Eutelsat 33 MHz A/3 A B C D MHz 9.6 8.0 4.2 4.8 8.0 8.6 6.7 8.57 MHz 28.8 24.0 12.6 14.4 24.0 25.8 20.2 25.7 MHz 36.0 30.0 15.75 18.0 30.0 32.0 25.2 32.1 MHz 45.5 35.0 18.0 20.5 ---37.0 28.9 39.4 MHz 60.0 50.0 26.5 28.0 ---54.0 40.0 52.0 a dB b dB c dB d dB e dB 0.6 0.3 0.3 0.3 0.5 0.6 0.2 0.5 2.5 3.0 2.5 2.5 2.5 2.5 2.2 2.5 10.0 7.0 6.5 7.5 ---10.0 8.3 9.35 25 25 25 25 ---25 25 25 0.3 0.1 0.1 0.1 0.3 0.3 0.0 0.25 A/3 MHz A MHz H MHz f ns g ns h ns 9.6 8.0 4.2 4.8 8.0 8.6 6.7 8.57 28.8 24.0 12.6 14.4 24.0 25.8 20.2 25.7 33.1 30.0 14.2 16.6 30.0 32.0 24.6 29.5 3 4 6 4 5 2 2 3 5 6 6 5 5 3 3 5 15 15 15 15 15 12 12 15 Filter Type A particular feature is the passive logic array which can be interrogated electronically to detect the filter type (see table opposite). Pins 21 and 22 are linked internally and can be used to determine if a filter is present in its mounting slot. Pin 16 is connected to a voltage representing logic 1 and pins 17 to 20 are either connected to this or ground. Pins 17 18 19 20 FB281 FB282 FB294 0 0 0 0 0 0 0 1 1 1 0 1 FB295 FB296 FB404 FB552 FB1037 0 0 0 1 1 1 1 1 0 1 0 0 1 1 0 0 1 0 0 0 © Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice Fara102d Page 1 of 2 Feb-00(C) PACKAGE DETAIL Note: For correct operation all the ground pins should be taken to a good earth plane. Faraday Technology Ltd. Croft Road Industrial Estate, Newcastle, Staffordshire ST5 0QZ. England. Fara102d Tel: Fax: Email: Web site: Page 2 of 2 + 44 (0)1782 661501 + 44 (0)1782 630101 [email protected] http://www.faradaytech.co.uk Feb-00(C)