Formula Sound GUARDIAN CX4 MK II Manual del usuario - Página 4
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Connect the priority source to the socket marked "IN" under the "MIC OR LINE I/P" section, the priority source will
now be available from the adjacent socket marked "OUT" until the priority is triggered. If the priority source is
required for normal day to day use it may be used by connecting to the "OUT" connector.
To set the control protocol, on the PCB behind the front panel locate relevant jumpers for control input (towards left
of front) and follow legend on PCB to set as required. See drawing 860PCB towards back of manual.
For manual or auto reset, locate the jumper on the front panel PCB for reset (right of centre) and follow legend on
PCB to set as required. See drawing 860PCB towards back of manual.
Test the control input with a trigger input and check the "TEST" button operates, check the reset operates as
required (manual or autoreset) when the trigger is removed.
Connect the audio channels (normally the mixer/zoner output) to the "IN" XLR of channels 1 – 4 (priority only can be
4 mono channels, 2 mono and 1 stereo channel or 2 stereo channels. Sound level control is 2 stereo or 2 mono
channels only. Stereo is channels 1 & 2 and/or channels 3&4).
The adjacent connector to each input is the output for that channel (marked "OUT"). Connect the output to whatever
was previously connected to the mixer/zoner (usually this will be equalisation, crossover or amplifiers).
Sound level control
1 On the front panel PCB set PEAK and THRESHOLD presets for channel 1&2 fully clockwise and check the
security loop is unbroken.
2 Put music through the CX4 (with Amplifiers at full volume and level held on the Mixer) and set Mixer to give
maximum required sound level.
3 If sound level control is not required jump to 9 below.
4 Adjust THRESHOLD preset anti-clockwise until LIMIT indicator illuminates.
5 Increase the Music level into the CX4 until the required peak threshold level (recommend about +6dB, use MIXER
output meter as indicator because CX4 will be limiting audio level) and adjust the PEAK preset until the PEAK
indicator illuminates.
6 Reduce music level back to maximum required audio level (PEAK off and LIMIT indicator illuminated).
7 If security loops are to be used then remove security loop for channels 1&2 (Pins 3&4 rear connector, DIM
indicator will illuminate) and adjust DIM preset to give required audio level with security loop broken.
8 Restore security loop.
9 Trigger priority input, either with the "TEST" button or via the control input (music still at maximum required audio
level), and adjust priority programme attenuation preset for Channel 1&2 (generally music should be quiet but
audible).
10 Apply priority input and adjust priority volume "OVERALL GAIN" when setting channels 1&2, and priority volume
"CHANS 3&4" when setting channels 3&4.
11 Remove the trigger and press "RESET" (if set for "AUTORESET" then wait for unit to autoreset).
12 Setting for channels 1&2 is now complete.
Repeat from 1 above for setting of presets for channels 3&4.
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