11
EN
TD-000077-00-K
Gain Controls
Refer to
Figure 22
and
Figure 23.
The Gain controls are recessed and can be adjusted with a small screwdriver or flat
tool. If desired, the Gain Control Security Cover can be installed to prevent changes
to the installer's settings.
Turn the gain controls clockwise to increase gain and counter clockwise to decrease
gain. The maximum voltage gain of the amplifier varies depending on the model
designation. Maximum voltage gain for each model is shown on the front panel
label in parentheses adjacent the 0dB attenuation setting.
The Gain controls are marked in dB of attenuation. There are 21 detents for
repeatable adjustments. The upper 14 steps are about 1 dB each, and settings should
normally be made within this range. The range below -14 dB should not be used for
normal program levels, as the input headroom could be exceeded, but can be used
for testing at reduced levels. At the minimum setting, the signal is completely cut off.
Gain Control Security Plate
The cover blocks access to the Gain settings. The LED indicators are still visible to
monitor the system's operation.
1. Use a 9/64" or 3.5 mm hex driver to loosen the screw several turns. Do not remove it completely.
2. Slide the right end of the cover under the loosened screw.
3. Insert the left end tabs into the last row of ventilation slots, and slide the panel fully to the right. It should lock into the slots.
4. Confirm that the LED's are visible through the cover. Tighten the hex screw carefully.
— Figure 24 —
Two-Channel Models
— Figure 22 —
Four-Channel Models
— Figure 23 —
Summary of Contents for CX302
Page 70: ...70 CH TD 000077 00 K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 powerCon 19 20...
Page 71: ...71 CH TD 000077 00 K FCC FCC 15 B QSC QSC www qsc com QSC QSC QSC QSC QSC...
Page 74: ...74 CH TD 000077 00 K 3 3 3 4 1 2 IEC...
Page 79: ...79 CH TD 000077 00 K 22 23 0dB dB 21 14 1 dB 14dB LED 1 9 64 3 5 mm 2 3 4 LED 24 22 23...
Page 87: ...87 TD 000077 00 K AR WARNING CAUTION IMPORTANT NOTE WARNING powerCon...
Page 88: ...88 TD 000077 00 K AR FCC NOTE 15 www qsc com QSC QSC QSC QSC QSC...
Page 89: ...89 TD 000077 00 K AR QSC CX 70 QSC QSC XLR 10 20 200 140 50 100 70 25 CX302 IT 42 CX 3...
Page 91: ...91 TD 000077 00 K AR 3 3 3 CAUTION 4 1 2 NOTE CAUTION...
Page 96: ...96 TD 000077 00 K AR 23 22 0 21 1 14 14 1 3 5 64 9 2 3 4 24 4 23 22...
