BSS-FDS360-sp-sch 电路图 维修手册.pdf

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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 27 18.0Filters and Frequency Tables The standard filter provided for the FDS-360 is of the Linkwitz-Riley response based on two second order Butterworth circuits in series. The response is a 24dB/OCT slope with a corner frequenc

2、y where the output of the filter if 6dB down from its pass band level. The use of these filter realisations has been well documented and provides the best possible phase and amplitude response for driving large speaker systems. Table 17.1 lists the component values for various frequencies and should

3、 be used in conjunction with the drawing for the FDS-360F frequency card (See Figure 18.3). Blank cards, or ready made cards can be provided by any BSS dealer. All resistors should be W metal film 2% tolerance or better. Capacitors should be 5% tolerance or better. Figure 18.1 shows how these compon

4、ents relate to the separate filter blocks to assist in making mixed frequency cards that might be needed for speaker systems that require gaps or overlaps in the amplitude response of the filters. Other filter responses can also be realised using these frequency cards, and your dealer will be able t

5、o supply these to order. 18.1 Standard Filters Should the fourth band output be required to work as a full range buffered output (See section 14.1), a full range frequency card is required to be inserted into FC3 position. This card removes all filtering associated with the third frequency point. Th

6、e limiter setting capacitor C10 should be chosen to suit the lowest frequency in the band, which would normally be 30Hz. Figure 18.4 shows the frequency card modified for this result. 18.2 Full Range Frequency Card Filters and Frequency Tables Fig 18.1 Frequency and Component Function 28 Fig 18.2 Co

7、mponent Values for Frequency Cards type FDS-360/1 FDS-360 FREQUENCY CARD COMPONENT SELECTION - 24dB/Octave Freq.R1R1R5R5C1C10C9 5043k47k82k100k100nF330nF150nF 6036k39k75k75k100nF330nF150nF 6333k39k47k150k100nF330nF150nF 7016k-39k180k100nF330nF150nF 8015k220k39k100k100nF220nF100nF 10018k30k24k330k100

8、nF220nF100nF 11012k68k39k43k100nF150nF68nF 12518k18k18k-100nF150nF68nF 1507k5-15k-100nF150nF68nF 1608k247k15k220k100nF150nF68nF 1806k2-13k330k100nF150nF68nF 20018k330k39k270k33nF150nF68nF 22018k100k100k47k33nF100nF47nF 25015k150k27k-33nF100nF47nF 28013k180k43k56k33nF100nF47nF 30015k47k27k150k33nF100

9、nF47nF 35015k27k39k39k33nF100nF47nF 40010k56k18k330k33nF100nF47nF 5006k8-15k150k33nF47nF22nF 6006k268k15k47k33nF47nF22nF 80039k22k39k100k10nF47nF22nF 1k012k180k47k43k10nF33nF15nF 1k210k150k27k62k10nF33nF15nF 1k310k68k18k470k10nF33nF15nF 1k57k5-15k-10nF22nF10nF 1k68k247k22k39k10nF22nF10nF 2k08k218k12

10、k180k10nF22nF10nF 2k518k56k27k-3n3F15nF4n7F 3k015k47k24k470k3n3F15nF4n7F 3k510k330k24k100k3n3F15nF4n7F 3k739k12k27k56k3n3F15nF4n7F 4k010k56k39k30k3n3F15nF4n7F 4k58k2100k18k100k3n3F10nF3n3F 5k06k8-18k56k3n3F10nF3n3F 5k56k2-13k270k3n3F10nF3n3F 6k06k268k15k47k3n3F10nF3n3F Filters and Frequency Tables 2

11、9 FDS-360 FREQUENCY CARD COMPONENT SELECTION - 24dB/Octave See Notes at bottom for full component ID. Freq.R1AR1BR5AR5BC1AC10C9 6k327k6k827k18k3n3F10nF3n3F 6k522k6k812k82k3n3F10nF3n3F 7k039k5k613k39k3n3F10nF3n3F 7k510k8k218k18k3n3F6n8F2n2F 8k010k7k510k62k3n3F6n8F2n2F 8k54k727k8k2330k3n3F6n8F2n2F 9k0

12、3k9120k8k2100k3n3F6n8F2n2F 9k515k56k82k33k1n0F6n8F2n2F 10k015k47k43k47k1n0F6n8F2n2F 12k012k43k27k62k1n0F6n8F2n2F 15k07k5-15k-1n0F6n8F2n2F 18k06k2-15k82k1n0F6n8F1n0F 20k05k6-13k82k1n0F6n8F1n0F R1A=R1A, R2A, R3A, R4A, R6A, R8A R1B=R1B, R2B, R3B, R4B, R6B, R8B R5A=R5A, R7A R5B=R5B, R7B C1A=C1A, C1B, C2, C3, C4A, C4B, C5, C6, C7, C8 C9=C9 C10=C10 Fig 18.3 FDS-360F Component Overlay Fig 18.4 FDS-360F Full Range Overlay C4A C1B C7 C8 C6 C5 C10 C2 C4BC3 C1A C9 R5A R8B R8A R6B R6A R2BR4B R2AR4A R1B R1A R3B R3A R7BR5B R7A 116