Viavi ONA-800A

Opzione ID	Descrizione
22055617	22055617;Printed Web Address for FCPRO SW
22070474	22070474;Packing label 40X76mmAW3209
22094656	FCPP-PS1;Single USB Output AC Input Charger With US EU UK AU Adapters
22099790	WIFI-CCODE-GERMANY;WiFi Country Code - Germany
22108525	FIBERCHEK;FiberChek Autofocus Microscope WiFi Bluetooth Incl. FBPT-U25M
22110922	22110922;USB A Male to USB Micro B Male 1.0M
22110926	FCPP-SCASE3;FiberChek Kit Bag
22112250	22112250;Corrugated Box for FiberChek 265x265x70mm
22112652	22112652;FiberChek QSG
22132783	C2K-EMPTYMOD;2000-sized Empty Module for ONA and CA5000
AC-PWRCRD-EU	AC-PWRCRD-EU;AC Power Cord Europe
CAA06M-CR	CAA06M-CR CAA Module Calibration Report
CAA06MB	CAA06MB 6 GHz Cable and Antenna Analyzer Module with Bias Power and Bias-Tee
DEMACC	Demo Accessories
E41OTDRPM	E41OTDRPM Power Meter Option for OTDR Modules
E4146QUAD	E4146QUAD Multimode/Singlemode 850/1300/1310/1550 nm OTDR includes: EUNISPCLC connector EUNISPCLCMM connector
EPCMM10M-LCPC-LCAPC	EPCMM10M-LCPC-LCAPC 10M mm -50/125Um- Patchcord LC/PC to LC/APC
EPCMM10M-LCPC-LCPC	EPCMM10M-LCPC-LCPC 10M mm (50/125Um) Patchcord LC/PC to LC/PC
EPCMM10M-SCPC-LCPC	EPCMM10M-SCPC-LCPC 10M mm (50/125Um) Patchcord SC/PC to LC/PC
EPCSM10M-LC-LC	EPCSM10M-LC-LC 10M SM Patchcord LC/PC to LC/PC
EPCSM10M-SCAPC-LCPC	EPCSM10M-SCAPC-LCPC 10M SM Patchcord SC/APC to LC/PC
EPCSM20M-SC-LC	EPCSM20M-SC-LC 20M Singlemode Patchcord SC/PC to LC/PC
EUNISPCLC	EUNISPCLC;SM UNIVERSAL PC/LC CONNECTOR/ADAPTER -S TYPE-
EUNISPCLCMM	EUNISPCLCMM;MM UNIVERSAL PC/LC CONNECTOR/ADAPTER -S TYPE-
FBPT-LC	FBPT-LC;Tip LC Bulkhead for FBP--REV0
FBPT-SC	FBPT-SC;Tip SC Bulkhead for FBP--REVC1
FBPT-SC-APC	FBPT-SC-APC;Tip SC-APC Bulkhead for FBP
FBPT-U12M	FBPT-U12M;Tip Universal 1.25mm Patch Cord for FBP
FBPT-U25MA	FBPT-U25MA;Tip Universal 2.5mm APC Patch Cord for FBP
FIT-FC-KIT3	FIT-FC-KIT3 Kit FiberChek Autofocus WiFi Microscope Tips for LC/PC SC/PC and SC/APC Case
G700050344	G700050344;Mag mount RF omni antenna SMA_f 600 MHz to 6 GHz
G700050532	G700050532 RF Cable DC to 8 GHz Type-N M to Type-N F_3.0 m
G700050571	G700050571 Adapter Type-N M to DIN F_DC to 7.5 GHz_50 Ohm
G700050576	G700050576 Adapter Type-N M to DIN M_DC to7.5 GHz_50 Ohm
G700050580	G700050580 Adapter Type-N M to Type-N M_DC to 11 GHz 50 Ohm
G700050583	G700050583 Adapter N_m_ to 4.1/9.5 MINI DIN_f_DC to 6.0 GHz_50 Ohm
G700050584	G700050584 Adapter N_m_to 4.1/9.5 MINI DIN_m_DC to 6.0 GHz_50 Ohm
G700050585	G700050585 Adapter N m to 4.3-10 f; DC to 6.0 GHz; 50 ohm
G700050586	G700050586 Adapter N m to 4.3-10 m; DC to 6.0 GHz; 50 ohm
G700050653	G700050653 Bias-Tee N_m N_f BNC_f 2.5 to 6000 MHz 1W with 250 mm BNC_m to SMA_m Cable
G710050533	G710050533;RF Cable 1.5 M N M - SMA M
JD70050007	JD70050007;AntennaAdvisor Handle
JD70050509	JD70050509 EZ-CAL Kit Type-N m_DC to 6 GHz_50 Ohm
JD70050542	JD70050542 JD720C hard carrying case with wheels
JD78050507	JD78050507 DUAL PORT CALIBRATION KIT TYPE-N_DC TO 6 GHZ_50 OHM
MP-60A	MP-60A USB OPTICAL POWER METER WITH ACCESSORIES
ONA-800A-BC	ONA-800A-BC;OneAdvisor Back Cover
ONA-800A-DISPL	ONA-800A-DISPL;OneAdvisor ONA-800A Display
ONA-800A-MF	ONA-800A-MF;OneAdvisor ONA-800A Mainframe
ONA-SP-GSS	ONA-SP-GSS;Gated Sweep Spectrum
ONA-SP-INTAN	ONA-SP-INTAN;Interference Analysis
ONA-SP-RM	ONA-SP-RM;Route Map
SAA-ADVISOR	SAA-ADVISOR;SMART ACCESS ANYWHERE FOR VIAVI ADVISOR PRODUCTS
ZP-PKG-0282	ZP-PKG-0282;Small Tip Case With Foam
ZP-PKG-0574	ZP-PKG-0574;QuickStart Guide For FiberChekPRO--REV1

Sono visualizzati 1 - 6 su 10 risultati

OneAdvisor ONA-800A Mainframe with Display & E81FMC1 Fiber Module Carrier for 8100-series modules

ID prodotto: P-441689

ONA-MF-WIFI • ONA-MF-WIFI;Wi-Fi ConnectivityE81FMC1 • E81FMC1;ONA-800 Fiber Module Carrier for 8100-series modules

Noleggio

Confermato nel preventivo

Preventivo

Quantità

Settimane

Data di inizio

Usato

Disponibilità confermata nel preventivo

Richiedi informazioni

E-mail +39 0292 392 801

Soluzioni Finanziarie

Chiedi maggiori informazioni ora per saperne di più

ONA-800A OneAdvisor ONA-800A Mainframe with Display

ID prodotto: P-647475

E81FMC1 • E81FMC1;ONA-800 Fiber Module Carrier for 8100-series modulesONA-PMVFL • ONA-PMVFL;POWER METER AND VFL MAINFRAME MODULE FOR ONA-800ONA-MF-WIFI • ONA-MF-WIFI;Wi-Fi Connectivity

Noleggio

Confermato nel preventivo

Preventivo

Quantità

Settimane

Data di inizio

Usato

Disponibilità confermata nel preventivo

Richiedi informazioni

E-mail +39 0292 392 801

Soluzioni Finanziarie

Chiedi maggiori informazioni ora per saperne di più

RFTest-ONA-800-V2-CAA-OTDR-FCOMP-SpecAn-FR1-Ethernet

ID prodotto: P-645671

ONA-SP-LTETDDOTA • ONA-SP-LTETDDOTA;LTE/LTE-A TDD OTA AnalysisG700050531 • G700050531;RF Cable DC to 8 GHz Type-N M to Type-N F_1.5 mG700050345 • G700050345;Mag Mount RF Omni Antenna 617-960/1700-6000 MHz 8 ft. LL-195 with N-plugG700050367 • G700050367;RF Log Periodic Antenna SMA-f 650 to 6000 MHz 2.85 dBdONA-SP-GNSS • ONA-SP-GNSS;GPS Connectivity with GPS AntennaONA-SP-RT100 • ONA-SP-RT100;Realtime Spectrum Analysis 100 MHzONA-SP-10M1GE • ONA-SP-10M1GE;10M and 1G Ethernet TestONA-SP-1GECAP • ONA-SP-1GECAP;Ethernet Capture 1GEETRUEBIDIR-FCOMP-PRO • ETRUEBIDIR-FCOMP-PRO;TRUEBIDIR SW LICENSE - ON-BOARD REAL TIME BIDIRECTIONAL EVENT ANALYSISONA-SP-CPRI18L2 • ONA-SP-CPRI18L2;CPRI Layer 2/BERT Rates 1 to 8ONA-SP-INTAN • ONA-SP-INTAN;Interference AnalysisCAA06MB • CAA06MB 6 GHz Cable and Antenna Analyzer Module with Bias Power and Bias-TeeCQSFP-112G-3-4-LR4 • CQSFP-112G-3-4-LR4;QSFP28 LR4 100GE and OTU4TO3-SM-LC-55-K • TO3-SM-LC-55-K;Optical nTAP - Three-Channel - 9um - SM - LC - 50/50 split ratioONA-SP-DSSOTA • ONA-SP-DSSOTA;DSS OTA AnalysisONA-SP-CHSC • ONA-SP-CHSC;Channel ScannerONA-SP-NSAOTA • ONA-SP-NSAOTA;NSA OTA AnalysisONA-SP-ODUS • ONA-SP-ODUS;O-DU S-Plane EmulationCSFP28-10G-25G-3-1 • CSFP28-10G-25G-3-1;SFP28 for 10G to 25G 1310nm - 10kmONA-SP-ODUC • ONA-SP-ODUC;O-DU CU-Plane EmulationG710050533 • G710050533;RF Cable 1.5 M N M - SMA MONA-SP-5GSIA • ONA-SP-5GSIA;5G NR Signal AnalysisJD78050509 • JD78050509;Y- CALIBRATION KIT TYPE-N_M _DC TO 6 GHZ_50 OHMONA-SP-LTETDSIA • ONA-SP-LTETDSIA;LTE/LTE-A TDD Signal AnalysisONA-SP-5GOTA • ONA-SP-5GOTA;5G NR Beamforming AnalysisONA-SP-10GELAN • ONA-SP-10GELAN;10G Ethernet TestONA-SP-RM • ONA-SP-RM;Route MapONA-SP-GSS • ONA-SP-GSS;Gated Sweep SpectrumG700050390 • G700050390;GPS SMA mount antennaONA-SP-ODUM • ONA-SP-ODUM;O-DU M-Plane EmulationONA-SP-TAGS • ONA-SP-TAGS;TDD Auto Gated SpectrumG700050701 • G700050701;OneAdvisor 800 Hard Carrying Case with Wheels for Full-sized ModulesEPCDUPSM3MLCLC • EPCDUPSM3MLCLC;3M SINGLEMODE DUPLEX PATCHCORD LC-LCONA-SP-25GECAP • ONA-SP-25GECAP;Ethernet Capture 25GEONA-PMVFL • ONA-PMVFL;POWER METER AND VFL MAINFRAME MODULE FOR ONA-800JD70050007 • JD70050007;AntennaAdvisor HandleONA-800A-HN • ONA-800A-HN;OneAdvisor HarnessONA-CAA-RFS • ONA-CAA-RFS;RF CW SourceONA-SP-BS • ONA-SP-BS;Blind Scanner for FR1ONA-MF-BT • ONA-MF-BT;Bluetooth ConnectivityONA-MF-WIFI • ONA-MF-WIFI;Wi-Fi ConnectivitySAA-ADVISOR • SAA-ADVISOR;SMART ACCESS ANYWHERE FOR VIAVI ADVISOR PRODUCTSG700050349 • G700050349;RF Omni Antenna 600 MHz to 6 GHz with SMA to N AdapterONA-SP-10GECAP • ONA-SP-10GECAP;Ethernet Capture 10GESPA06MA-O • SPA06MA-O;Spectrum Analyzer Module 9 kHz to 6 GHz with Optical HardwareAC-009801 • AC-009801;Large Strand Hook with Straps for HST and OneExpertONA-SP-LTEFDSIA • ONA-SP-LTEFDSIA;LTE/LTE-A FDD Signal AnalysisONA-SP-CPS • ONA-SP-CPS;5G NR Cell Phase SynchronizationE4138FB65-FCOMP-APC • E4138FB65-FCOMP-APC;4100 MODULE B FIBERCOMPLETE - 1310/1550/F1650 NM - APCELCSM20M-SCA-LC • ELCSM20M-SCA-LC;20M SM FIBER LAUNCH CABLE SC/APC WITH ANGLED BOOT TO LC/PCG700050125 • G700050125;120 watts DC to DC car cigarette lighter charger adapterDEMACC • Demo AccessoriesONA-SP-EMF-SA • ONA-SP-EMF-SA;EMF AnalysisONA-CAA-2P • ONA-CAA-2P;2 Port Transmission MeasurementONA-SP-CPRI18 • ONA-SP-CPRI18;RFoCPRI Line Rates 1 to 8 for Interference AnalysisONA-SP-LTEFDDOTA • ONA-SP-LTEFDDOTA;LTE/LTE-A FDD OTA AnalysisONA-SP-25G1588 • ONA-SP-25G1588;25GE 1588/PTP Test OptionCSFPPLUS-1G-10G-3-1 • CSFPPLUS-1G-10G-3-1;1310 SFP+ supporting 1G to 10G all rates CPRIG700050653 • G700050653 Bias-Tee N_m N_f BNC_f 2.5 to 6000 MHz 1W with 250 mm BNC_m to SMA_m CableONA-SP-25GE • ONA-SP-25GE;25G Ethernet TestEFTTASLM • EFTTASLM;FTTA-SLM FUNCTION

Noleggio

Confermato nel preventivo

Preventivo

Quantità

Settimane

Data di inizio

Usato

Disponibilità confermata nel preventivo

Richiedi informazioni

E-mail +39 0292 392 801

Soluzioni Finanziarie

Chiedi maggiori informazioni ora per saperne di più

RFTest-ONA-800A OneAdvisor ONA-800A M/F w/Disp SPA06MA-O, CAA06MB

ID prodotto: P-645703

G700050608 • G700050608;Bandpass filter 880 MHz to 915 MHz; Nm to Nf; 50 ohmG700050606 • G700050606;Bandpass filter 703 MHz to 748 MHz; Nm to Nf; 50 ohmG700050358 • G700050358;Mag mount RF omni Antenna Type N_m; 689 to 6000 MHzONA-800A-WCS • ONA-800A-WCS;OneAdvisor 800 Small Wrap Case for SPA Module/CAA ModuleSFP-XFP-CASE-6-3 • SFP-XFP-CASE-6-3;TB/MTS 6000 MSAM Optics Soft Carrying Case for 6 SFP and 3 XFP ModulesG710050533 • G710050533;RF Cable 1.5 M N M - SMA MG700050580 • G700050580 Adapter Type-N M to Type-N M_DC to 11 GHz 50 OhmONA-800A-BP • ONA-800A-BP;OneAdvisor 800 BackpackG700050349 • G700050349;RF Omni Antenna 600 MHz to 6 GHz with SMA to N AdapterG700050607 • G700050607;Bandpass filter 832 MHz to 862 MHz; Nm to Nf; 50 ohmONA-MF-BT • ONA-MF-BT;Bluetooth ConnectivityCSFP28-10G-25G-3-1 • CSFP28-10G-25G-3-1;SFP28 for 10G to 25G 1310nm - 10kmJD78050509 • JD78050509;Y- CALIBRATION KIT TYPE-N_M _DC TO 6 GHZ_50 OHMCSFPPLUS-1G-10G-3-1 • CSFPPLUS-1G-10G-3-1;1310 SFP+ supporting 1G to 10G all rates CPRIONA-MF2-PEM • ONA-MF2-PEM;Power Expansion ModuleONA-PMVFL • ONA-PMVFL;POWER METER AND VFL MAINFRAME MODULE FOR ONA-800AC-PWRCRD-UK • AC-PWRCRD-UK;AC Power Cord U.K. and IrelandSAA-ADVISOR • SAA-ADVISOR;SMART ACCESS ANYWHERE FOR VIAVI ADVISOR PRODUCTSC2K-EMPTYMOD • C2K-EMPTYMOD;2000-sized Empty Module for ONA and CA5000G700050575 • G700050575;Adapter Type-N F to Type-N F_DC to 18 GHz_50 OhmG700050390 • G700050390;GPS SMA mount antennaONA-800A-BC • ONA-800A-BC;OneAdvisor Back CoverG700050585 • G700050585 Adapter N m to 4.3-10 f; DC to 6.0 GHz; 50 ohmTOT3-SM-LC-55-K • TOT3-SM-LC-55-K;10 Gb Optical nTAP - Three-Channel - 9um - SM - LC - 50/50 split ratioG700050613 • G700050613;Bandpass filter 3300 MHz to 3800 MHz; N_m to N_f; 50 ohmSPA06MA-O • SPA06MA-O;Spectrum Analyzer Module 9 kHz to 6 GHz with Optical HardwareG700050611 • G700050611;Bandpass filter 2500 MHz to 2570 MHz; Nm to Nf; 50 ohmCB-019967 • CB-019967;OPTICAL CABLE: 3M SINGLEMODE LC TO LC SIMPLEXJD70050542 • JD70050542 JD720C hard carrying case with wheelsDEMACC • Demo AccessoriesCQSFP-112G-3-4-LR4 • CQSFP-112G-3-4-LR4;QSFP28 LR4 100GE and OTU4CAA06MB • CAA06MB 6 GHz Cable and Antenna Analyzer Module with Bias Power and Bias-TeeG700050576 • G700050576 Adapter Type-N M to DIN M_DC to7.5 GHz_50 OhmG700050571 • G700050571 Adapter Type-N M to DIN F_DC to 7.5 GHz_50 OhmG700050125 • G700050125;120 watts DC to DC car cigarette lighter charger adapterONA-SP-GNSS • ONA-SP-GNSS;GPS Connectivity with GPS AntennaG700050367 • G700050367;RF Log Periodic Antenna SMA-f 650 to 6000 MHz 2.85 dBdONA-MF-WIFI • ONA-MF-WIFI;Wi-Fi ConnectivityCB-019968 • CB-019968;OPTICAL CABLE: 3M SINGLEMODE LC TO LC DUPLEXJD70050509 • JD70050509 EZ-CAL Kit Type-N m_DC to 6 GHz_50 OhmG700050610 • G700050610;Bandpass filter 1920 MHz to 1980 MHz; Nm to Nf; 50 ohmG700050609 • G700050609;Bandpass filter 1710 MHz to 1785 MHz; Nm to Nf; 50 ohmG700050531 • G700050531;RF Cable DC to 8 GHz Type-N M to Type-N F_1.5 m

Noleggio

Confermato nel preventivo

Preventivo

Quantità

Settimane

Data di inizio

Usato

Disponibilità confermata nel preventivo

Richiedi informazioni

E-mail +39 0292 392 801

Soluzioni Finanziarie

Chiedi maggiori informazioni ora per saperne di più

RFTest-ONA-800A OneAdvisor ONA-800A M/F w/ Disp & RA09MA-O

ID prodotto: P-645700

ONA-MF-WIFI • ONA-MF-WIFI;Wi-Fi ConnectivityONA-SP-DGNSS • ONA-SP-DGNSS;Dual GNSS Connectivity with AntennaG700050367 • G700050367;RF Log Periodic Antenna SMA-f 650 to 6000 MHz 2.85 dBdCB-019968 • CB-019968;OPTICAL CABLE: 3M SINGLEMODE LC TO LC DUPLEXTOT3-SM-LC-55-K • TOT3-SM-LC-55-K;10 Gb Optical nTAP - Three-Channel - 9um - SM - LC - 50/50 split ratioRA09MA-O • RA09MA-O;Spectrum Analyzer Module 9 kHz to 9 GHz with Optical HardwareONA-800A-BP • ONA-800A-BP;OneAdvisor 800 BackpackG700050349 • G700050349;RF Omni Antenna 600 MHz to 6 GHz with SMA to N AdapterG700050608 • G700050608;Bandpass filter 880 MHz to 915 MHz; Nm to Nf; 50 ohmG700050607 • G700050607;Bandpass filter 832 MHz to 862 MHz; Nm to Nf; 50 ohmG700050390 • G700050390;GPS SMA mount antennaONA-MF2-PEM • ONA-MF2-PEM;Power Expansion ModuleSAA-ADVISOR • SAA-ADVISOR;SMART ACCESS ANYWHERE FOR VIAVI ADVISOR PRODUCTSONA-PMVFL • ONA-PMVFL;POWER METER AND VFL MAINFRAME MODULE FOR ONA-800AC-PWRCRD-UK • AC-PWRCRD-UK;AC Power Cord U.K. and IrelandJD70050007 • JD70050007;AntennaAdvisor HandleONA-MF-BT • ONA-MF-BT;Bluetooth ConnectivityONA-800A-WCL • ONA-800A-WCL;OneAdvisor 800 Large Wrap Case for RA ModuleCB-019967 • CB-019967;OPTICAL CABLE: 3M SINGLEMODE LC TO LC SIMPLEXG700050606 • G700050606;Bandpass filter 703 MHz to 748 MHz; Nm to Nf; 50 ohmC2K-EMPTYMOD • C2K-EMPTYMOD;2000-sized Empty Module for ONA and CA5000SFP-XFP-CASE-6-3 • SFP-XFP-CASE-6-3;TB/MTS 6000 MSAM Optics Soft Carrying Case for 6 SFP and 3 XFP ModulesG700050613 • G700050613;Bandpass filter 3300 MHz to 3800 MHz; N_m to N_f; 50 ohmG700050610 • G700050610;Bandpass filter 1920 MHz to 1980 MHz; Nm to Nf; 50 ohmG700050609 • G700050609;Bandpass filter 1710 MHz to 1785 MHz; Nm to Nf; 50 ohmG700050611 • G700050611;Bandpass filter 2500 MHz to 2570 MHz; Nm to Nf; 50 ohmJD70050542 • JD70050542 JD720C hard carrying case with wheelsDEMACC • Demo AccessoriesCQSFP-112G-3-4-LR4 • CQSFP-112G-3-4-LR4;QSFP28 LR4 100GE and OTU4G700050358 • G700050358;Mag mount RF omni Antenna Type N_m; 689 to 6000 MHzONA-800A-BC • ONA-800A-BC;OneAdvisor Back CoverCSFPPLUS-1G-10G-3-1 • CSFPPLUS-1G-10G-3-1;1310 SFP+ supporting 1G to 10G all rates CPRICSFP28-10G-25G-3-1 • CSFP28-10G-25G-3-1;SFP28 for 10G to 25G 1310nm - 10kmG700050125 • G700050125;120 watts DC to DC car cigarette lighter charger adapter

Noleggio

Confermato nel preventivo

Preventivo

Quantità

Settimane

Data di inizio

Usato

Disponibilità confermata nel preventivo

Richiedi informazioni

E-mail +39 0292 392 801

Soluzioni Finanziarie

Chiedi maggiori informazioni ora per saperne di più

RFTest-ONA-800A OneAdvisor ONA-800A M/F w/ Disp. & CAA06MA

ID prodotto: P-645677

CAA06MA • CAA06MA;6 GHz Cable and Antenna Analyzer ModuleJD78050509 • JD78050509;Y- CALIBRATION KIT TYPE-N_M _DC TO 6 GHZ_50 OHMG700050575 • G700050575;Adapter Type-N F to Type-N F_DC to 18 GHz_50 OhmJD70050509 • JD70050509 EZ-CAL Kit Type-N m_DC to 6 GHz_50 OhmONA-MF2-PEM • ONA-MF2-PEM;Power Expansion ModuleSAA-ADVISOR • SAA-ADVISOR;SMART ACCESS ANYWHERE FOR VIAVI ADVISOR PRODUCTSONA-800A-BP • ONA-800A-BP;OneAdvisor 800 BackpackG700050532 • G700050532 RF Cable DC to 8 GHz Type-N M to Type-N F_3.0 mAC-PWRCRD-UK • AC-PWRCRD-UK;AC Power Cord U.K. and IrelandONA-MF-BT • ONA-MF-BT;Bluetooth ConnectivityONA-MF-WIFI • ONA-MF-WIFI;Wi-Fi ConnectivityG700050585 • G700050585 Adapter N m to 4.3-10 f; DC to 6.0 GHz; 50 ohmG700050125 • G700050125;120 watts DC to DC car cigarette lighter charger adapterDEMACC • Demo AccessoriesG700050576 • G700050576 Adapter Type-N M to DIN M_DC to7.5 GHz_50 OhmG700050571 • G700050571 Adapter Type-N M to DIN F_DC to 7.5 GHz_50 OhmG700050580 • G700050580 Adapter Type-N M to Type-N M_DC to 11 GHz 50 OhmONA-800A-WCS • ONA-800A-WCS;OneAdvisor 800 Small Wrap Case for SPA Module/CAA ModuleG700050583 • G700050583 Adapter N_m_ to 4.1/9.5 MINI DIN_f_DC to 6.0 GHz_50 Ohm