User manual RANE BB 44X-OPTION 88

[. . . ] OPERATORS MANUAL BB 44X / OPTION 88 Application Information Driving Impedances Some people wrongly feel you cannot use a transformer to convert between -10 dBV and +4 dBu because of low impedances. This is not a problem as long as you use them to interconnect equipment with at least 15 k input impedance. [. . . ] Note the shields (commons) of the RCA jacks are tied for the Inputs and the Outputs but not to each other. This allows ground isolation of stereo Input and Output pairs. A positive signal applied to pin 2 of the 3-pin connectors causes a positive signal to appear on the tip of the associated RCA jacks, and vice-versa. Signal Direction Signal can be converted through the channels either direction. That means there is the possibility of having 4 channels -10 dBV unbalanced to +4 dBu balanced, or vice versa (in the standard unit). The only problem arises in the gender of the XLR connector. The solution requires same-sex XLR adaptors or special cables. Chassis Grounding A tapped hole and a #6-32 screw is provided for chassis grounding purposes. Good practice dictates earth-grounding the BB 44X. If the grounding integrity of the rack screws is in doubt, run a wire from this screw to a known earth ground. [. . . ] The OPT 88 may be used in some environments without the BB 44X, however best RFI rejection is obtained using the cold rolled steel metal chassis of the BB 44X. ©Rane Corporation 10802 47th Ave. W. , Mukilteo WA 98275-5098 TEL 425-355-6000 FAX 425-347-7757 WEB www. rane. com All features & specifications subject to change without notice 12275 [. . . ]