User manual MACKIE MB-24

[. . . ] Remove the plastic caps that cover the Meter Bridge mounting holes on each side of the Console (Drawing A). Congratulations on adding a Meter Bridge to your Mackie Designs 8·Bus Console. Installation is very straightforward and should take just a few minutes. [. . . ] Turn the collars by hand until you feel the pin seat itself (it will stop turning). Using a hefty screw driver, install a flush screw almost all the way into each side (Drawing D at right). On the Console, locate the rubber plugs that cover the Meter Bridge ribbon cable 16. 17. The 32·8 has five; the 24·8 has four; the 16·8 and MB·E each have three (see epic MondoDrawing E at the top). Remove the rubber plugs and feed them to the afore-mentioned boa constrictor. Making sure that the plug and socket are aligned, firmly insert each ribbon cable into its corresponding socket in the Console (F). Take care to make sure that the cable is not twisted 180° (sounds insulting to caution you against something like this, but we've seen it done. ) Unless your fingers are microminiature, you'll probably need to use the eraser end of a pencil to press down on the plug and make sure that it is fully seated (G). Slide the new improved, slotted rubber plugs (that are pre-attached to the ribbon cables) down until they fit snugly into the rectangular Console holes (Drawing H). Wash hands before returning to work. D A SHORT TEST-DRIVE The point of this exercise is to make sure that all the Meter Bridge channels (and all the LED's on each channel) work properly. The meter bridge's VU meters (unless you're installing an MB·E); and C. If nothing lights up, F turn the power off immediately and recheck your connections. If the Meter Bridge TAPE LED is on, press the SOURCE button below it once to switch to G CHANNEL. If the CHANNEL LED is on, switch it to TAPE and back to CHANNEL, to confirm that the switch is behaving. The ­20 LED above the fader will let you know if you have done so. After making sure that the channel is not muted, turn up the channel fader. You'll probably want to stop whooping after about the sixth or seventh channel. [. . . ] You will notice that the VU meters and LED meters will not always agree with each other. The VU meters, designed in the Early Bronze Age, are slower to respond and therefore show an RMS or average signal level. This will usually be several dB less than the peaks shown on the LED meter. [. . . ]