Qioptiq DIV 20 Instruction Manual - page 13
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Appendix C:
Using the Bulk-Ferrite:
4 pcs Ferrite are shipped with the DIV 20 driver. Please assemble them to the
cables in the following way:
1. Ferrite No. 7427154 has to be mounted to the cable plugged to the Pulse-Input-TTL of
the DIV 20. The Ferrite should be placed close to the “Pulse”-Input-TTL (max. 30cm
distance). In case a thin cable is used there may be a loop (loop diameter <10cm) to
fix the Ferrite-position (see Fig.4).
2. For best EMC-performance please mount the 2 Ferrites No. 74271221 and 1 Ferrite
No. 74271131 to the special (3-wire) cable close to the output-side of the DIV 20
special cable (distance from the output-plug should be less than 35 cm). Although
their order is not relevant, we suggest arranging them as depicted on Fig.5. Then the
Ferrites maximum distance from the load (here a LM0202 type modulator) is fixed by
the small Ferrite.
Fig. 5: Connecting Ferrites to the Modulator-cable