● Anchoring use Coaxial Cable for 3G/HD-SDI transmission ・ Products Technical Support ３Ｇ-ＳＤＩ／ ＨＤ-ＳＤＩTransmission In 2006, ３Ｇ-ＳＤＩspecification was set by SMPTE 424M specification. Single coaxial cable can transmit 2 times volume of existing ＨＤ-ＳＤＩ signal. Our ＴＣＸ-ＨＤ series has been developed subject to transmit ３Ｇ-ＳＤＩ from the beginning, therefore, customers can comfortably use with satisfaction like the existing ＨＤ-ＳＤＩtransmission. Conversion table of standard transmission distance by SDI signal-wise in SMPTE speciﬁcations Each SDI transmission distance is set in accordance with Ｓ ＭＰＴＥ specification. The standard distance is calculated based on the actual measurement of our coaxial cable, 3G-SDI HD-SDI SD-SDI SMPTE 424M SMPTE 292M SMPTE 259M （2.97Gbps） （1.485Gbps） （270Mbps） Max.20dＢ Max.20dＢ Max.30dＢ Attenuation （@1.485GHz）（@742.5MHz）（@135MHz） refering to ＳＭＰＴＥ specification.(The figure is typical value, not guaranteed.) However, it is becoming clear that the transmission distance is rather longer than the standard at the right table against the specified figures. TACHII measured on the max.distance TCX-2.8CHD for 2-types signal of ３Ｇ-ＳＤＩ and ＨＤ-ＳＤＩ as the TCX-3CHD representative in the combination as undermentioned. TCX-4CHD Measuring terms for max. distance TCX-5CHD Term① ３G-SD I signal ３G HD3 G7 Signal generator Te k t r on i x TG70 0 Measured cable T CX-4CHD T CX-5CHD TCX-6CHD for３ G − S D I Waveform monitor Tek t r on i x W F M 8 3 00 TCX-7CHD TCX-8CHD Test signal 1080P 59 . 94Hz Pathological signal TCX-3CFB TCX-4CFB Term② H D -SD I signal HD HDVG7 Signal generator Te k t r on i x TG70 0 Measured cable T CX-4CHD T CX-5CHD TCX-5CFBL for H D − S D I Waveform monitor Tek t r on i x W F M 8 3 00 TCX-7CFBL Test signal 1080 i 59 . 94Hz Pathological signal H D -SD I signal 1 HDVG7 Signal generator Te k t r on i x TG70 0 Measured cable T CX-4CHD T CX-5CHD for H D − S D I Waveform monitor Tek t r on i x W F M 7 1 0 0 Test signal 1080 i 59 . 94Hz Pathological signal 69ｍ 89ｍ 115ｍ 132ｍ 162ｍ 191ｍ 212ｍ 73ｍ 93ｍ 113ｍ 158ｍ 246ｍ 317ｍ 413ｍ 452ｍ 586ｍ 692ｍ 772ｍ 266ｍ 337ｍ 417ｍ 596ｍ ３Ｇ-ＳＤＩ (Term①) Max. transmission distance actually measured 150ｍ 100ｍ 0ｍ 200ｍ 50ｍ Term③ HD 48ｍ 62ｍ 81ｍ 93ｍ 113ｍ 133ｍ 148ｍ 50ｍ 65ｍ 78ｍ 108ｍ TCX-4CHD TCX-5CHD Standard distance：81ｍ 160ｍ (WFM8300) Standard distance：93ｍ 185ｍ (WFM8300) Please take that the aboves are our measurement actuals, just as reference only. Because the distance may be HD -ＳＤＩ (Term②③) Max. transmission distance actually measured 150ｍ 100ｍ 0ｍ 50ｍ 200ｍ 250ｍ 300ｍ different, depending on the used environment (materials, temperatures etc.).Two types cable were selected for Standard distance：115ｍ measurement, prepared by ５ｍ-lot measurable.Judging from the results listed at the right, transmission could be TCX-4CHD Standard distance：115ｍ surprisingly confirmed nearly double distance of SMPTE 145ｍ(WFM7100) Standard distance：132ｍ standard when WFM8300 was used (40dB in attenuation). The results were largely different between new and old type 230ｍ(WFM8300) TCX-5CHD of waveform monitor, despite of the same signal in Term ②③. This means it is very important to know in advance max. Standard distance：132ｍ 255ｍ 160ｍ(WFM7100) (WFM8300) ※ Max. transmission distance was actually determined, after measuring the distance (of transmission distance of the used equipment, when the no bit error happened) on the continuous transmission for more than 5 hours. system is actually designed. TCX-3CHD ＳＤＩTransmission distance improvement TCX-2.8CHD Wiring on rack for space-saving・lightening TCX-3CHD,TCX-2.8CHD vs. conventional 3CFB Comparison 3CFB TCX2.8CHD Cable O.D. 4.4mm Cable Weight （100m） 2.6kg HD-SDI Standard transmission distance 3G-SDI Standard transmission distance 69m 48m TCX-3CHD Commodity cable actually measured abt.20％Thinner abt.38％Lighter Equivalent level Equivalent level 5.5mm 4.2kg 70m 48m Since our introduction,TCX-2.8CHD has been widely employed in the fields undermentioned, because of contribution to density growth and lightening of broadcasting equipments. Equivalent level abt.9％Lighter abt.27％Up abt.29％Up 5.5mm ・Space-saving in density router using DIN connector ・Space-saving in wiring on rack ・Space-saving & lightening in big o.b.vans for HD ・Lightening of mobile helicopter, etc. 3.8kg 89m 62m Note : The figures are typical, are not the guaranteed value. The requirement has been increased more in the transmission capability of coaxial cable, in accordance with ３Ｇ-ＳＤＩappearance & ３Ｄ image adoption, more densified content signal transmission than before in one cable. TCX-3CHD introduction is one of TACHII s contributions for ３Ｇ transmission, in which we have succeeded to improve the transmission distance nearly 30% despite of similar size with ３ＣＦＢ. 5CFB TCX-4CHD Cable O.D. 6.5mm Cable weight （100m） 5.1kg HD-SDI Standard transmission distance 115m 3G-SDI Standard transmission distance TCX-5CHD Commodity measured value abt.32％Lighter 7.5kg abt.6％Up 108m abt.10％Up 73m 81m broadcasting equipments. TACHII has improved 5FCB in view of ① Thinning・ Lightening， ② Transmission distance improvement. abt.15％Thinner 7.7mm 5FCB is the most frequently used cable between room-to-room in the connection for Equivalent level abt.5％Lighter abt.22％Up abt.27％Up 7.7mm In ＨＤ-ＳＤＩtransmission, customers can enjoy some room in transmission as nearly 30% space-saving in volume ratio and 32% lightening in weight ratio when employing 7.1kg TCX-4CHD which has transmission distance equivalent to ５ＣＦＢ or more. In ３Ｇ-ＳＤＩ transmission, by any means, the distance becomes shorter than ＨＤ-ＳＤＩtransmission. 132m 93m TCX-5CHD is the most suitable for ３Ｇ-ＳＤＩtransmission, even though nearly same size with ５ＣＦＢ, and 27% longer than ５ＣＦＢ. ＴＣＸ-３ＣＨＤ, TCX-4CHD and TCX-5CHD are the leading players in over next ３Ｇ-ＳＤＩera. Note : The figures are typical, are not the guaranteed value. Anchoring use Coaxial Cable for 3G/HD-SDI transmission Comparison TCX-4CHD,TCX-5CHD vs. 5CFB ・ Products Technical Support ● TCX-5CHD ＳＤＩTransmission distance improvement TCX-4CHD Space-saving・Lightening in room-to-room Coaxial cable for mobile application（3G／ＨＤ-ＳＤＩtransmission） TACHII feels the strongest need for ＨＤ-ＳＤＩ in mobile application used at Conversion table for standard transmission distance by SDI signal-wise in SMPTE speciﬁcations hookup and in studio etc. therefore, TACHII has added, ＴＣＸ-４ＣＦＷＳ as the medium size between TCX-3CFWS to TCX-5CFWS in our lineup. These can be used because of better flexibility and better balance in transmission 3G-SDI HD-SDI SD-SDI SMPTE 424M SMPTE 292M SMPTE 259M （2.97Gbps） （1.485Gbps） （270Mbps） distance / cable size, in the case that 3C not enough but 5C too fat / heavy. ＴＣＸ-５ＣＦＷ is also available, higher bendability has been developed even in single conductor specification for 100m length ＨＤ-ＳＤＩtransmission which has not been able to reach so far by ＴＣＸ-５ＣＦＷＳ. TACHII has employed original designing to cope with the lower temperature situations in winter, prepared 4 types as our lineup, customers can select the most suitable for respective applications.The undermentioned transmission distance and bendability to help when cable selections. All those products are also perfectly 51ｍ TCX-5CFWS TCX-5CFW 75ｍ 275ｍ 60ｍ 87ｍ 324ｍ 70ｍ 104ｍ 383ｍ corresponding to ３Ｇ-ＳＤＩ. Relation between Transmission distance and Flexibility by the Cable-wise Flexibility indication T-4E6S T-2T2S etc. Soft TCX-3CFWS TCX-4CFWS TCX-5CFWS 3CFW made by other company TCX-5CFW TCX-5CFBL 5CFW made by other company Hard 0ｍ 10ｍ 20ｍ 30ｍ 40ｍ 50ｍ 60ｍ 70ｍ Transmission distance of HD-SDI signal 80ｍ 90ｍ TCX-5CHD 100ｍ 2 Coaxial cable for mobile application 3G/HD-SDI transmission indicate the relation between ＨＤ-ＳＤI TCX-4CFWS ● extremely hardening-resistant Max.20dＢ Max.20dＢ Max.30dＢ （@1.485GHz）（@742.5MHz）（@135MHz） TCX-3CFWS 41ｍ 59ｍ 216ｍ Attenuation ● Digital microwave link transmission for hookup ・ Products Techinical Support Digital Microwave link Transmission Cable for mobile application The 5D-2W max. transmission distance has seriously dropped to 300m in microwave link operation by current digital method unlike in the case of existing analog system. Due to the lack of specification on transmission distance like for HD-SDI signal, maximum transmission distance shows big difference even with same cable by microwave link system maker-wise, and in some cases the transmission distance shows somewhat difference even by same model because of the product variation. 5D-2W has shown the said limitations in the microwave link operation with digital method same as the conventional analog system. Judging from the limitations of 5D-2W coaxial cable in the microwave link operation at hookup points like golf, marathon, soccer etc. where 5D-2W is used to communicate between control unit and head unit, TACHII has newly develped TCX-5DFW,TCX-5DFWS coaxial cable for mobile application to materialize long distance transmission in digital microwave link market, utilizing our accumulated know-how in designing and manufacturing to become 5D-2W in next generation. TACHII has materialized by TCX-5DFW the maximum long distance transmission with 5D size, keeping equivalent size of 5D-2W. TCX-5DFWS has materialized easy workability of figure eight shape winding by soft-finished as well as transmission distance further increase. Both of TCX-5DFW,TCX-5DFWS have combined great appeal and influences never find with conventional 5D-2W. Comparison between TCX-5DFW,TCX-5DFWS vs. 5D-2W 5D-2W TCX-5DFW 3 TCX-5DFWS Commodity actually measured Cable Standard O.D. 8.2mm Equivalent level 8.0mm Equivalent level 8.2mm Cable Standard weight （100m） 11.9kg Equivalent level 11.1kg Equivalent level 11.5kg Standard attenuation with130MHz （per 100m） 8.1dB Standard loop resistance 10.2Ω/km Cable bendability △ abt.16％Up abt.32％Up abt.6％Up 9.7dB abt.23％Up 15.1Ω/km Hard to handle Composite stranded wire is employed as the center conductor Improved ○ In TACHII’s TCX-5DFWS newly developed, our original composite stranded conductor has been employed as the center conductor, in similar way with 5CFWS (the mobile coaxial cable developed for SDI signal). Because of this, the loop resistance can be reduced by making the cross-section area abt. 10% increase comparing with normal stranded conductor. As the result, the max. transmission distance could be greatly increased in digital microwave link transmission. 9.1dB Auxiliary wire 11.5Ω/km ◎ Base wire Composite Stranded wire conductor Note：The ﬁgures are typical, and not the guaranteed value. General Stranded wire conductor Max. transmisson of distance in actual digital microwave link In digital microwave link transmission at actual hookup point, 300m is used to understand that is maximum number of distance limitation by 5D-2W conventionally used coaxial cable. But, it is often the case that the hookup point cannot actually operate by 300m when adding to connection status of connector and aged deterioration of cable. It used to generate a big anxiety at the hookup point even if 300m transmission materialized. TACHII surveyed the maximum number of distance in actual digital microwave link transmission by ourselves, and made the report as per the following graph. These figures should be understood as the measurement example only and were not guaranteed value by system maker. It is necessary to confirm respectively the transmission distance again when higher system of transmission distance capacity is developed. Max. transmission distance example between the control unit and head unit in digital microwave link system（Sending） Coaxial cable System maker General ５D-2W In general 0m Max. transmission distance 300m 400m 300m（Reference） 450m Ａ TCX-5DFWS Ｂ Ｃ TCX-5DFW 500m 410m 460m Ａ Ｂ 500m 450m Note：The ﬁgures are results in our measuring examples, and do not mean any guarantee by system makers and us. Tachii has succeeded to greatly increase the max. number of distance to more than 400m with ＴＣＸ-５ＤＦＷＳ, more than 450m with ＴＣＸ-５ＤＦＷ , comparing with conventional ５Ｄ-２Ｗ. Judging from the actual operation, the cable is oftenly used on the basis of 100m, 50m, in some cases 25m, each cable operational distance is about ２７５∼３００ｍ with 5D-2W, about ３５０∼４００ｍ with ＴＣＸ-５ＤＦＷＳ , about 400 ∼ 450ｍ with ＴＣＸ-５ＤＦＷ, as one of the standards. Prior to the actual employment by digital microwave link system, please be advised to measure maximum number of distance without fail and then use the cable with the distance about ２５∼５０ｍ shorter than measurement result. attenuation values of IF signal were measured on new product time and every 100times wind/spread. The result was as graphed below, the attenuation deterioration caused by mobile was not confirmed. For VSWR change in up to 1GHz, every cable scarcely changed, the stability could be confirmed. 130MHz attenuation value change after wind-up/spread 1.00 5D-2W ＜Test conditions＞ Cable length：10.0 m（both ends with N-type connector） 0.95 Bobbin diameter：275mm ＜Testing methods＞ 0.90 ① Wind cable, protecting connector at both ends, Attenuation value 〔dB〕 0.85 ・ Products Technical Support TACHII made cyclic test of digital microwave link use coaxial cable for wind-up/spread to winding bobbin, as realistic usages. The 130MHz ● Digital microwave link transmission for relay Cyclic test for wind-up/spread ﬁx one end to bobbin TCX-5DFWS ② Spread cable fully upto the maximum elongation by hand with other end ③ Wind up the spreaded cable by rotating bobbin TCX-5DFW ④ Repeat ②,③ 0.80 Measure the attenuation value and VSWR of the cable on new product time and every 100 times wind/spread 0.75 0 100 200 300 400 500 600 700 800 900 1000 Repeated numbers of wid-up/spread 〔 Times 〕 New product time Digital microwave link cable for anchoring to facilities The requirement was increased to make digital microwave link transmission distance more longer even in cable for facilities like mobile usages. 8D-2W was oftenly used for facilities so far. The transmission distance was understood as 450m after switching to digital system, the distance was not enough as microwave link system purpose for big facilities like dome studium for baseball and succer etc. and as a result many limitations were reported in view of the distance between O.B. van to relay terminal board in the facilities.To settel these problems, TACHII developed ＴＣＸ-８ＤＨＦ ＢＷ （ＰＥ）and perfectly materialized ultra long distance digital microwave link transmission for anchoring exclusively to the facilities. ● 4 Comparison between TCX-8DHFBW(PE) and conventional 8D-2W TCX-8DHFBW(PE) Cable O.D. 12.4 mm Cable standard weight （per 100m） 25.9 kg 130MHz standard attenuation value to become IF signal（per 100m） 7.3 dB Standard loop resistance between center conductor and outer conductor 7.33 Ω／km Weatherability on outdoor use Equivalent level 12.5 mm abt. 3％ Lighter 24.9 kg abt. 39％ Improved 4.4 dB abt. 39％ Improved 4.46 Ω／km × Use material for outdoor only （Gray PVC sheath） ◎ Note：The ﬁgures are typical, not guaranteed value. ＴＣＸ-８ＤＨＦＢＷ（ＰＥ）is exclusively employing polyethylen sheath which has been actually used outdoor purpose more than 20 years in order to minimize deterioration even in outdoor wiring for long term. This cable is very strong in weatherability against ultraviolet and winds/rains and keeps the caracters as coaxial cable for long time. TACHII has been trying our very best to provide transmission distance as long as possible and also to keep the highest reliability. Max. transmission distance example between the control unit and head unit in microwave link system Coaxial cable Sending/ Receiving General 8D-2W Sending/ Receiving System maker 0m In general Max. transmission distance 400m 500m 600m 700m 800m Ｂ 950m 750m Ｃ TCX-8DHFBW(PE) 900m 1025m min. Ａ Receiving Ｂ Ｃ 1000m 1100m 450m（Reference） Ａ Sending 900m 800m 1025m min. Note：The ﬁgures are results in our measuring examples, and do not mean any guarantee by system makers and us. Digital microwave link transmission for big size facilities 8D-2W Commodity actually measured ● Production techniques of Coaxial cables ・ Products Technical Support Coaxial cable production Return loss management TACHII has been producing coaxial cable, lineuped for ３Ｇ-ＳＤＩ、 ＨＤ-ＳＤＩtransmission in accordance with our internal specifications to manage the return loss lower. In actual, ＴＣＸ-ＨＤ series, ＴＣＸ-ＦＷＳ series, TCX-FBL(FB) series have recorded the return loss as 20.9ｄＢ min. ( ３ＧＨｚ), this means more than 91% of the sending signal can be transmitted. This specification has sufficient margin as return loss management figure at both sending/receiving terminals and can be easily compared with the specifications of SMPTE 424M(３Ｇ-ＳＤＩ), SMPTE 292M(ＨＤ-ＳＤＩ). In actual transmission among equipments, this is our reaction to safely send the signals for the better return loss management, in consideration of getting worse at the connector and patch panel connection when one cable oftenly going through by J-J connector to video-patch panel more than once with several coaxial cables in transmission, The right-hand graph shows the sample image of the monitoring system using Return loss managing system by the fast Fourie-transform analysis Fourie-transform analysis for total inspection pf return loss on the production process of coaxial cable insulator. The system can do total inspection and monitoring of the return loss value in the designated frequency band. As long as homogeneous form shaping on the core molding is obtained, very low and stable value of the return loss shall be shown. Of course, the deterioration of return loss value against the frequency maybe happened in the central conductor production process and brading process etc. TACHII s accumulated know-how has Electrostatic capacitance changes on the foamed core production Return loss wave movement against frrequency change over time be exercised in the respective process. TACHII, as the specialized manufacturer of coaxial cable, shall continue our very best effort so that TACHII can be the most reliable supplier for our customers. Return loss management system by the Fourie-transform analysis The wave pattern in the right-hand graph shows the changes of electrostatic capacitance on the extrusion of insulation core forming. The changes are processed by Sample：TCX-5CHD foamed insulator core production computor on Discrete Fast Fourie Transform (DFFT), the return loss of insulator core is displayed in real time under the graph. The return loss has been always monitored whether the cable has been produced within the sufficient level against the specifications by inputting the designated value internally specified by cable model wise. 3-layer structure - Foamed core production technology ● 5 TACHII has totally employed the force nitrogen gas foaming system under high pressure into polyethylene resin in the process to produce foamed polyethylene insulation core for TCX series Coaxial Cable, and also blended polyethylene resin by Coaxial cable with 3-layer structure foamed core cross section area Outer skin layer （Solid PE layer） Center conductor About our policy for hazardous substances to the environment our original ratio of high density polyethylene (HDPE) with low density polyethylene (LDPE) for the most suitable cable design and production, in order to meet to the signal types, cable usages and operation systems. The skin layer (solid polyethylene layer) is respectively set at the central conductor side and the outer circumferential of foamed insulation as the foamed insulation structure. It is vital and indispensable structure for skin layer to adhesiveness between conductor and foamed insulator and to stabilize foamed polyethylene molding. As a mater of course, the molding stability directly dictates the stable return loss. Inner skin layer （Solid PE layer） Foamed polyethylene layer About our policy for hazardous substances to the environment TACHII has been certified by ISO14001 since January, 2003, aiming to Earth-friendly manufacturing under the environment protection movement. In addition, TACHII has been manufacturing by using X-ray fluorescence spectrometer etc. in accordance with RoHS Regulations set in July, 2006. X-ray ﬂuorescence spectrometer made by SII Nanotechnology SEA1000AⅡ ＲｏＨＳ R e g u l a t i o n s Ｒｅｓｔｒｉｃｔｉｏｎ oｆ ｔｈｅ ｕｓｅ ｃｅｒｔａｉｎ Ｈａｚａｒｄｏｕｓ Ｓｕｂｓｔａｎｃｅｓ ｉｎ electrical and ｅｌｅｃｔｒｏｎｉｃ ｅｑｕｉｐｍｅｎｔ in European Union RoHS Regulations substances and threshold values as of May, 2011 Controlled substances Threshold value Cadmium 100 ppm Lead 1000 ppm Mercury Hexavalent Chromium 1000 ppm 1000 ppm PBB 1000 ppm PBDE 1000 ppm ※ Some substances are exempted. When looking from just behind direction <BNCP-K series> When looking form When looking just behind direction, from an angle fitting position behind, fitting (actual)can be position (actual) clearly confirmed. of both <BNCP-T series> connectors can When identifying at be confirmed. side of conventional connector or at just behind,it is almost ・ Products Technical Support When looking from an angle behind BNC Connector actual fitting ● Characters of specialized BNC Connector New ﬁtting conﬁrmation for BNC Connector impossible to confirm BNC Connector with Conventional new identification BNC Connector method made by TACHII (BNCP-K series） （BNCP-T series） fitting position (actual). Although so many equipments in broadcasting stations are connected by millions of cables and connectors, all the expected functions can be properly worked when the cables have been certainly connected. If by any chance, any connector has not been surely fitted, such situation shall definitely cause accident in broadcasting. TACHII has materialized to more surely confirm the fitting than ever before by pasting TACHII s original identification seal to the specialized BNC Connector, developed by us for our coaxial cable TCX series only and made by ＫＩＮＧＳ, Previously, it was the actual situation that, in the identification line at the side of connector (BNCP-T series), the fitting could be confirmed from an angle behind of the connector, however it could not be confirmed from just behind direction and therefore the expected performance could not be fully worked. For example, most connectors densely wired in the rack could be looked at just behind direction only. It was actually impossible to confirm from an angle behind. The new BNC connector（BNCP-K series）has been produced to make it revolutionarily easy to confirm the fitting whichever looking from an angle behid and just behind. In addition, the identification color has been unified by series wise, the connector model number with adaptable cable name have been printed so that in actual connector processing field, different size connector mistake can be avoided when possible and the adaptable cable can be quickly found. With reference to identification seal availability and details of mark color, please check at the list on page 19. （Note）The final fitting confirmation of connector must be surely done by your hand or tool, the locking position confirmation is purely as a guide. 6 Improvement of reliaility for the BNC Connector, crimping type BNC Connector「BNCP-T series」has been in the market for our coaxial cable「Specialized for TCX series」. 「BNCP-T series」have been excellent so far for ＨＤ-ＳＤＩtransmission, in view of VSWR character and mechanical structure. TACHII has jointly developed new BNC Connector「BNCP-K series」with ＫＩＮＧＳ in U.S. in order to completely correspond to 3G-SDI transmission and get the higher reliability by inheriting the above characteristics. We have materialized ＶＳＷＲ 1.1 max. at ３ＧＨｚ or less (except some product). We have totally employed Teflon insulator structure originally developed by ＫＩＮＧＳ to fix surely center contact keeping absolutely still, as well as to materialize low reflection property by VSWR of course. In actual comparison with center contact shape, it can be noticed to surely fix the center contact in extremely wide range on Teflon insulator comparing with used commodities in broadcasting stations. In addition,「BNCP-K series」can totally fix crimping part of center contact (right side of contact in photo below) perfectly with Teflon insulator. Namely the structure is designed, in order not to cause any movement, to completely contain with Teflon insulator, excepting the center contact edge part, As a result, the contact connection is dramatically stabilized when connected and the transmission block can be prevented. Comparison of center contact shape ◎ BNCP-K series new × Commodities for broadcasting（example） Abt. ２.３ times broad area can be fixed by Teflon insulator than commodities Locking structure By this, cable can be locked and fixed by Teflon insulator. Additionally the structure is designed to perfectly fixed by Teflon insulator to cable crimping part. Only this area can be fixed by Teflon insulator with commodities for boradcasting. Locking structure By this, cable can be locked and fixed by Teflon insulator. Cable is not kept than constriction part. Constriction part In locking structure of center contact in「BNCP-T series」,the favorable comment has been given for snap contact (clicking feeling), which clearly identify the work, when inserted perfectly on center contact to connector itself. In order to make sure the perfect locking, we have also employed the improved system to「BNCP-K series」. The feeling on insert, is greatly different by the angle at the above salient cone part and its size. The center contact gives uncomfortable feeling when actually passing through Teflon insulator, no feeling is confirmed at the time of the conical part being out of Teflon insulator, and then the clicking feeling on perfect locking can become noticed, same as in 「BNCP-T series」, because locking is finished.
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