Tekbox TBISN-T4 ISN for Balanced Telecom Lines
ISN for conducted EMC testing on two balanced telecom lines according to CISPR 22, covering 150 kHz–30 MHz with 150 Ω impedance and 50 Ω BNC measurement port.
The Tekbox TBISN-T4 is an Impedance Stabilization Network (ISN) designed for conducted EMC testing on two balanced telecommunication lines. It is intended for measuring asymmetric common-mode disturbances from information technology equipment in accordance with CISPR 22 and complies with the requirements of CISPR 16-1-2, CISPR 32 and CISPR 15.
The TBISN-T4 features an asymmetric impedance of 150 Ω and a voltage division factor of 10 dB ±1 dB. It meets the Longitudinal Conversion Loss (LCL) requirements defined in CISPR 22, providing stable and repeatable EMC measurements for pre-compliance and laboratory testing.
The unit is equipped with D-SUB 25 connectors for the EUT and auxiliary equipment together with a 50 Ω BNC measurement port for connection to an EMI receiver or spectrum analyzer. Covering the frequency range from 150 kHz to 30 MHz, it provides the decoupling performance required by the applicable EMC standards.
- ISN for two balanced telecom lines
- Frequency range: 150 kHz–30 MHz
- Asymmetric impedance: 150 Ω ±20 Ω
- Phase: 0° ±20°
- Longitudinal Conversion Loss compliant with CISPR 22
- Voltage division factor: 10 dB ±1 dB
- 50 Ω BNC measurement port
- D-SUB 25 connectors for EUT and AE
- Maximum voltage: 63 V AC / 100 V DC
- Maximum current: 250 mA
- Differential mode insertion loss: <3 dB
- Complies with CISPR 16-1-2, CISPR 22, CISPR 32 and CISPR 15