| F-120-8 |
| RF
Electromagnetic fields frequently degrade the performance of the electronic
equipment in automobiles by generating common mode currents on cables.
The effect of these E/H fields on the automobiles electronic equipment
can be simulated very well by injecting common mode currents on to the cables of the equipment. GM 3100 defines one procedure and different test levels for conducted immunity testing of wiring harnesses over the frequency range of 1 – 400 MHz per substitution method ISO 11452-4. Figure 1 shows a typical test set-up compliant with GM 3100 and ISO 11452-4. |
| The
F-120-8 Clamp-on Injection Probe is a high efficiency broadband injection
transformer developed to meet the demanding performance requirements of
GM 3100. The major challenge of GM 3100 is to deliver 1 amp to the 50••••calibration
fixture between 1 and 30 MHz in the calibration step of the test procedure.
The F-120-8 offers a number of distinct overwhelming advantages. The primary advantage of the F-120-8 is its high efficiency. Over the full bandwidth of the test, having less than 7 dB of loss from 500 kHz – 400 MHz. More specifically, the Injection Probe has less than 5 dB of loss over a critical portion of the bandwidth, 1 – 30 MHz, where the disturbance signal reaches a maximum level of 1 amp for level 2 testing. While standard injection probes require up to 7000 watts to meet the 1 amp level, the F-120-8 requires less than 220 watts at maximum. This represents a savings in power of > 3000%! |
|
The following tables show power required by the F-120-8 to achieve the level 1 and level 2 disturbance signals defined in GM 3100. |
| F-120-8 Specifications | |
| Frequency: | 10 kHz – 400 MHz |
Internal Diameter: |
40 mm |
| External Diameter: | 127 mm |
| Thickness: | 134 mm |
| Input Power Rating: | 100
watts for 30 minutes 250 watts for 15 minutes |
| Accessories |
| FCC-BCICF-4 – Calibration Fixture |
| F-52
– Clamp on Monitor Probe 10 kHz – 500 MHz, 40 mm Internal Diameter |