User manual RANE SP 13

[. . . ] A & B Input OVERLOAD indicators: are useful in monitoring pickup level and initially in setting PICKUP GAIN TRIM controls. These indicators light approximately 4 dB before actual clipping, so occasional flickering is okay, but they should never be allowed to light steadily. INVERT switches: Invert the polarity (phase) of the A pickup with respect to the B pickup. LOW CUT frequency: adjusts the corner frequency of the LOW CUT (high-pass) filter from 15 Hz to 250 Hz. [. . . ] As long as nothing is plugged into the B jack, the signal from EXPAND A automatically drives EXPAND B. These jacks also provide an auxiliary input path from another mixer, instrument, tape, etc. INSERT loop A & B jacks: Two unbalanced ¼" TRS jacks wired per the tip=send, ring=return convention. Allows placing an outboard signal processor in series with the main signal paths. RETURN A & B jacks: Two unbalanced ¼" TS jacks used as the return path from the OUTPUTS of an outboard signal processor. As long as nothing is plugged into the B jack, the signal from RETURN A automatically drives RETURN B. SEND A & B jacks: Two unbalanced ¼" TS jacks are used to connect to the inputs of an outboard signal processor. AUX OUTPUT: An unbalanced ¼" TS jack gives a direct dry Output signal from the A Pickup only. TUNER OUTPUT: An unbalanced ¼" TS jack used for tuner connection, fed by both pickups. Located post EQ but preLEVEL, this Output is unaffected by either the LEVEL or OUT controls. Ground lift switch: provides the ability to separate chassis ground and signal ground. In some circumstances, moving it to the opposite position eliminates hum and buzz problems. Remote power supply input: This unit is supplied with an RS 1 Remote AC Power Supply (RAP) suitable for connection to this input jack. Never use a power supply other that the one supplied or a replacement approved by Rane. Using any other type of supply may damage the unit and void the warranty. Chassis grounding screw: A #6-32 screw is used for chassis grounding purposes. See CHASSIS GROUNDING below. CHASSIS GROUNDING NOTE If after hooking up your system it exhibits excessive hum or buzzing, there is an incompatibility in the grounding configuration between units somewhere. Try combinations of lifting grounds on units that are supplied with ground lift switches or links. If your equipment is in a rack, verify that all chassis are tied to a good earth ground, either through the line cord grounding pin or the rack screws to another grounded chassis. Units with outboard power supplies do not ground their chassis through the line cord. Make sure that these units are grounded either to another chassis which is earth grounded (such as the amplifier), or directly to the grounding screw on an AC outlet cover. Please refer to RaneNote 110, "Sound System Interconection" (included with this manual) for further information on system grounding. Manual-3 OPERATING INSTRUCTIONS OPTIMIZING PICKUP GAIN CONTROLS The Gain of each pickup input is adjusted via recessed INSTRUMENT GAIN trims on the front of the SP 13. [. . . ] A standard TRS insert style (tipsend, ring-return) Y-cord gets input and output from the INSERT jack to the effects unit. In the SEND and RETURN loop, the most you can obtain is a 50% effects signal, because the dry signal is internally mixed with the return. Another effects tip: If you want to put one effect on just the A, and a different effect on just the B, but you want a mono output, just pan everything hard left and right for stereo and push the MONO switch on the rear of the SP 13. EXPAND JACKS Signal entering the SP 13 through these jacks sums (postEQ and effects loops) with the internal signal. [. . . ]