Related Manuals for Rane BB 22 Balance Buddy
Summary of Contents for Rane BB 22 Balance Buddy
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Page 1: Table Of Contents
BB 22 BALANCE BUDDY Contents Features General Description BB 22 Application Information BB 22 Specifications Designator Drawing Recycle cardboard and paper. Block Diagram Schematic Sound System Interconnection Warranty Cartons et papier à recycler. 11259... -
Page 2: Features
• +24 dBu Maximum Levels General Description The Rane BB 22 Balance Buddy is a handy professional-grade tool used to provide isolation for and convert unbalanced -10 dBV consumer level RCA outputs up to balanced +4 dBu professional XLR inputs. The BB 22 converts one pair from -10 dBV to +4 dBu. -
Page 3: Bb 22 Application Information
BB 22 Application Information Conversion Ratio The casual observer would think to convert -10 dBV to +4 dBu, you would need 14 dB of gain. The casual observer would be wrong. You only need 12 dB of gain. The reason is not only do you change levels, you also change refer- ence levels—from dBV to dBu. -
Page 4: Bb 22 Specifications
BB 22 Specifications... -
Page 5: Designator Drawing
Designator Drawing... -
Page 6: Block Diagram
Block Diagram INPUT 1 OUTPUT 1 -10 dBV +4 dBu INPUT 2 OUTPUT 2 -10 dBV +4 dBu... -
Page 7: Schematic
Schematic... -
Page 8: Sound System Interconnection
• Cause & prevention of ground loops • Interfacing balanced & unbalanced • Proper pin connections and wiring • Chassis ground vs. signal ground • Ground lift switches Rane Technical Staff RaneNote 110 © 1985, 1995, 2006, 2007 Rane Corporation... - Page 9 —Grounding and EMC practices — Shields of connectors in audio equipment containing active circuitry.” Rane’s policy is to accommodate rather than dictate. However, this docu- ment contains suggestions for external wiring changes that should ideally only be implemented by trained technical personnel. Safety regulations require that all original grounding means provided from the factory be left intact for safe operation.
- Page 10 Ground Loops Almost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to understand the mechanism that causes ground- ing noise in order to effectively eliminate it. Each component of a sound system produces its own ground internally.
- Page 11 This is the right way to do it. So why doesn’t audio equipment come wired this way? Well, some does, and since 1993, more of it does. That’s when Rane started manufacturing some of its products with balanced inputs and outputs tying pin 1 to chassis.
- Page 13 See Figure 2. Many manufacturers provide several tools for this task, including Rane. Consult your audio dealer to explore the options available. The goal of these adaptors is to allow the use of standard cables. With these transformer isolation boxes, modification of cable assemblies is unnecessary.
- Page 14 The Last Best Right Way To Do It If transformer isolation is not an option, special cable assemblies are a last resort. The key here is to prevent the shield currents from flowing into a unit whose grounding scheme creates ground loops (hum) in the audio path (i.e., most audio equipment).
- Page 15 (Rane always provides this chassis point as an external screw with a toothed washer.) Any device with a 3-prong AC plug, such as an amplifier, may serve as an earth ground point.
- Page 16 Floating, Pseudo, and Quasi-Balancing During inspection, you may run across a ¼" output called floating unbal- anced, sometimes also called psuedo-balanced or quasi-balanced. In this configuration, the sleeve of the output stage is not connected inside the unit and the ring is connected (usually through a small resistor) to the audio signal ground.
- Page 17 Conference: Audio Test & Measurement, Portland, OR, May 1992, pp. 82- 92 (Audio Engineering Society, New York, 1992). 8. Macatee, RaneNote: “Grounding and Shielding Audio Devices,” Rane Corporation, 1994. 9. Philip Giddings, “Grounding and Shielding for Sound and Video,” S&VC, Sept.
- Page 18 From Output...
- Page 19 From Output...
- Page 20 To Input From Output...
- Page 21 To Input From Output...
- Page 22 To Input From Output...
- Page 23 To Input From Output...
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Page 24: Warranty
1) arising out of material or workmanship not provided or furnished by Rane, or 2) resulting from abnormal use of the product or use in violation of instructions, or 3) in products repaired or serviced by other than authorized Rane repair facilities, or 4) in products with removed or defaced serial numbers, or 5) in components or parts or products expressly warranted by another manufacturer. - Page 25 Rane warranty repair facility in the country where purchased, or to the Rane factory in the U.S., in the original packaging or a replacement supplied by Rane, with all transportation costs and full insurance paid each way by the purchaser or owner.
- Page 26 Warranty from 2 years to 3 years! TO VALIDATE YOUR EXTENDED WARRANTY Use the postcard that came in the box with your unit, or go to www.rane.com and click on New Product Registration. Fill out the warranty completely, being sure to include the model and serial number of the unit since this is how warranties are tracked.
- Page 27 FACTORY SERVICE If you wish your Rane product to be serviced at the factory, it must be shipped fully insured, in the original packing box or equivalent. This warranty will not cover repairs on products damaged through improper packaging. If possible, avoid sending products through the U.S.
- Page 28 BB 22 BALANCE BUDDY 5.1" 0.35" 0.15" OUTPUT 1 OUTPUT 2 INPUT 1 INPUT 2 RANE CORP. -10dBV -10dBV +4dBu +4dBu BB 22 BALANCE BUDDY...