Overview
The Schwarzbeck CDN HDMI is part of the coupling decoupling network series for conducted common mode immunity testing according to IEC 61000-4-6. The CDN HDMI is compliant to IEC 61000-4-6 figure D.1 and is suitable for immunity testing on HDMI lines.
The CDN HDMI is intended for measurements on devices with a shielded 19- pin HDMI interface, such as those used for PC monitors and televisions. The frequency range is from 150 kHz to 230 MHz. The circuitry is shown in Fig. 4.
All CDNs comply to the requirements of IEC 61000-4-6. Each CDN comes with individually measured data and a calibration certificate for the common mode impedance and the voltage division factor. Further typical data for the phase (not normative) can be found in fig. 2.
A variety of calibration adapters and other accessories are available as option. With the two included adapters SA HDMI in conjunction with the optional series resistor SR100-6W, the required spacing of 30 mm is obtained as depicted in Fig. 9 of IEC 61000-4-6.
The connection to ground can be accomplished using the ground plane of the CDN. Additionally there is a M4 thread located at the AE side to ground as well as a 4 mm socket to connect the device to ground.
Fig. 1: typ. EuT common mode impedance
Fig. 2: typ. Phase EuT-port, (common mode)
Fig. 3: typ. voltage division factor RF-port to EuT-port
Fig. 4: principal circuitry CDN HDMI
| Schwarzbeck CDN HDMI Specifications | |
| Frequency range | 150 kHz … 230 MHz |
| Common mode impedance | 150 kHz–24 MHz: 150 Ω ±20 Ω 24 MHz–80 MHz: 150 Ω +60 ? / -45 Ω 80 MHz-230 MHz: 150 Ω ±60 Ω |
| Max. RF-test voltage (emf) | 30 V |
| Max. RF-input-power | 6 W (continuous) |
| RF-input-connector | 50 Ω BNC (female) |
| Voltage division factor RF-input – EuT-port | 10 dB 150 kHz – 80 MHz: ±1 dB 80 MHz – 230 MHz: +3 dB / -2 dB |
| Housing Material | Aluminium |
| Housing dimensions | 266 x 105 x 108 mm |
| Weight | ca. 1985 g |
| EuT, AE Connectors | HDMI female |
| Included accessories | SA HDMI |
| Ground Adapter | (one unit included by default) |
| Optional accessories: 50 ? to 150 ? adapter | SR100-6W |
