User manual MACKIE SR56-8

[. . . ] Damage Requiring Service -- This Mackie product should be serviced only by qualified service personnel when: A. The power-supply cord or the plug has been damaged; or B. Objects have fallen, or liquid has spilled into this Mackie product; or C. This Mackie product has been exposed to rain; or D. [. . . ] In 400Hz sine mode, you may want to send out a calibrated level (via the TALKBACK ASSIGN switches. ) To do this, engage the appropriate ASSIGN switch, then engage one SOLO switch in the selected circuit. For instance, to calibrate while sending out to AUX SEND MASTER 1­4, engage the TALKBACK ASSIGN: AUX 1­4 switch and then engage SOLO on one (and only one) of those AUX SEND MASTERS. The OSCILLATOR level appears on the CENTER (PFL) Meter. Be aware: This does not mean that all outputs delivering the sine wave are calibrated, as their levels may be dependent on their own master level controls. But it does mean that the sine wave level is calibrated as it's fed to its ASSIGN switches. The PINK NOISE/400HZ oscillator cannot be assigned directly to the CENTER MAIN output . One easy way to accomplish this is to connect a patch cable between the TALKBACK jack on the rear panel and the left OUT input of one of the MAIN AUX RETURNS , A1 for example. Press EXTERNAL in the TALKBACK ASSIGN section, and assign AUX RETURN A1 to the center channel. Alternatively, AUX RETURN B4 can be used, since it is specifically assigned to the center channel. O O MAX RECEIVE IGNORE CALL COMMUNICATIONS O O MAX LEVEL ON 400Hz PINK NOISE OSCILLATOR OSCILLATOR SECTION The SR40·8's TALKBACK signal may be replaced by either of two on-board sound sources -- a 400Hz sine wave for checking levels, or a PINK NOISE generator for quickly checking the frequency response of your amp/speaker systems. 400HZ/PINK NOISE Point Before: 400Hz and PINK NOISE oscillators. With the switch up (disengaged), the oscillator delivers a 400Hz sine wave, typically used for calibrating and matching levels with external devices. With the switch down (engaged), it delivers a modified PINK NOISE. PINK NOISE is used for performing quick frequency response checks. TALKBACK MIC O O MAX TALKBACK LEVEL MATRIX A AUX 1-4 MATRIX B AUX 5-8 MATRIX C EXTERNAL MATRIX D L/R ASSIGN TALKBACK O O MAX SOLO LEVEL O O MAX PHONES INTERCOM TALKBACK CO C OS 39 O O MAX RECEIVE IGNORE CALL COMMUNICATIONS O O MAX LEVEL ON 400Hz PINK NOISE OSCILLATOR ON Point Before: TALKBACK LEVEL , (OSCILLATOR) LEVEL . Engaging this switch replaces the microphone TALKBACK signals with an OSCILLATOR signal, either 400Hz sine wave or PINK NOISE, depending on the 400Hz/PINK NOISE switch position. Be aware that engaging this switch turns the OSCILLATOR on, whether or not the TALKBACK switch is engaged. With the OSCILLATOR ON switch disengaged (up), both the 400Hz and PINK NOISE generators are put to sleep to ensure that absolutely no leakage from these generators will appear at any of the SR40·8's outputs. That's why there's a short delay when you turn the 400Hz oscillator on, to allow the circuit to ramp up and stabilize first. So please be polite -- do not disturb the oscillators when they're trying to sleep. The last thing you want during your show is a cranky oscillator. COMMUNICATIONS If your system uses the Clear-Com® Intercom System, then you certainly have chosen the right console -- The SR40·8 provides a Clear-Com®-compatible interface. Furthermore, the interface is transformerisolated to prevent any nasty ground loops from showing up in the audio. If you already have the Clear-Com® Intercom System, you probably already know how it works, so we'll just discuss how it affects the engineer sitting behind an SR40·8. INTERCOM All you have to do is press this big switch and you'll be on a party line with all the other Clear-Com® participants. [. . . ] Regarding altered states (of ULTRA MUTE): ULTRA MUTE has a built-in method of letting you know when a mute configuration has been altered, either deliberately or accidentally, from its nominal state. In Preview Mode: When you enter preview mode, then select a different group or snapshot to preview, the LED above the PREVIEW button begins to blink, indicating that the mute LEDs on the console represent a different state than what is actually implemented. In Snapshot Mode: When you recall a snapshot, the decimal point LED in the numeric display lights steadily. If you manually add or subtract a mute from the snapshot, the LED begins to blink, indicating that the snapshot has been altered from its original state. [. . . ]