The balun transforms an unsymmetrical signal at a 50 Ω source impedance into a galvanically isolated symmetrical signal at 100 Ω impedance in a wide frequency range.
Thus measurements on symmetrical quadripoles which have an impedance of 100 Ω can be done using regular measurement devices which work with a 50 Ω impedance usually.
For instance the response characteristic of VDSL2+ lines can be determined with the SYS9223-100. Also measurements according to CISPR 17 (resp. DIN EN 55017) can be performed on components or filters.
The device under test or equipment under test (DuT, EuT) can be connected to the SY9223-100 using a RJ45 jack or two 4 mm jacks.
The measurement device has to be connected to the BNC connector using a shielded coaxial cable.
Besides this 100 Ω model there are broadband baluns available for 120 Ω, 135 Ω and 150 Ω.
| Frequency range: | 9 kHz – 60 MHz |
| Insertionloss: | 10 dB |
| Flatness: | <±1 dB |
| Input connector: | BNC |
| Inputimpedance: | 50 Ω unsymmetrical |
| Input impedance matching: | >15 dB @ 9 kHz – 60 MHz |
| Output connectors: | RJ45 Pin 4+5; 4 mm banana female |
| Output impedance: | 100 Ω symm. |
| Max. input power: | 1 W |
| Test voltage primary-secondary: | 200 V DC |
| Groundconnector: | 4 mm socket |
| Dimensions: | 130 x 105 x 48 mm |
| Weight: | 470 g |
| Housing material: | Aluminium |