杭州紫光网络技术有限公司 6-Cavity Duplexer for the 450 MHz BandDESCRIPTION-The DPF 70/6 is a 6-cavity duplex filter for duplex radiotelephones.-The DPF 70/6 can be adjusted within the complete 406 - 470 MHz band. The duplexer can be delivered in four different versions according to required duplex spacing. See also “Ordering information” below.-The DPF 70/6 is primarily intended for equipment, where the TX and RX operate on single frequencies, but it can also, however with slightly reduced data, be used where the TX and RX operate on several channels, i.e. within a certain port bandwidth. In the last case, factory tuning is recommended.-The filter uses full-length 1/4 cavities in a compact, extruded aluminum housing. The chassis is made of passivated steel, and teflon insulation has been applied in the coaxial cables and in the connectors.-The filter is black vinyl coated to prevent corrosion.SPECIFICATIONSELECTRICALTX/RX FREQUENCY 406 - 470 MHzMAX. INPUT POWER 50 WINSERTION LOSS TX-ANT AND ANT-RX(at 4.5 MHz duplex spacing)Single-channel tuned 1.2 dB（Typ. 1.0dB）Multi-channel tuned, 1.5 MHz BW 1.2 dB（Typ. 1.0dB）TX NOISE SUPPRESSION ON RX-FREQUENCYSingle-channel tuned 85 dBMulti-channel tuned, 2 MHz BW 65 dBRX ISOLATION ON TX-FREQUENCYSingle-channel tuned 85 dBMulti-channel tuned, 2 MHz BW 65 dBIMPEDANCE Nom. 50 VSWR 1.5MechanicalTEMP. RANGE 30 C +60 CFREQ. STABILITY Approx. 4.5 ppm/ CCONNECTORS BNC-femaleDIMENSIONS (L x W x H) 226 x 154 x 33 mmWEIGHT Approx. 990 gMODEL SELECTION TABLEDUPLEX SPACING (MHz)ORDERING DESIGNATION5 - 7DPF 70/6 5/77 - 9DPF 70/6 7/99 - 13DPF 70/6 9/1313 - 16DPF 70/6 13/16ORDERING INFORMATIONWhen ordering, please use the table above to select the appropriateordering designation for the desired filter type. If duplex TX and RXfrequencies are stated when ordering, the duplexers are deliveredfactory adjusted. If TX and RX frequencies are not stated, the filters aredelivered non-adjusted.PLEASE NOTESpecial configurations of this filter type may be quoted on request. Forinstance, the filter can be delivered with other connector types, or withflying leads (RG 316 coaxialCURVESOutline for reference: