User manual RANE CP 31

[. . . ] This Output uses a line driver that may be used balanced or unbalanced. DUCKER: With the DUCKER switches ON, and a Program source playing, speak into the mic and adjust the DUCKER DEPTH to control the Program level during a page. Program will return to its previous volume after the page has finished. ZONE OUTPUT: The ZONE OUTPUT uses a line driver that may be used balanced or unbalanced. [. . . ] PAGING DETECT THRESHOLD sets the Page signal level required to gate a Page on and illuminate the ACTIVE indicator (#5). PAGING OL (Overload) indicator lights when the Page Input preamplifier comes within 4 dB of clipping. ACTIVE indicator lights when the Page signal level reaches the Paging Detect Threshold. Note that a Page is always Active when the PAGING DETECT THRESHOLD is set to minimum (ccw). PAGING ASSIGN switch selects whether the Page signal is sent to Zone A, Zone B, BOTH Zones, or OFF (no Zones). PAGING LEVEL controls adjust the Paging Level in each of the two (A & B) Zones. PROGRAM INPUT LEVEL controls allow independent level adjustment for the stereo or dual mono Program Input(s). ZONE DUCKER DEPTH control sets the Ducker Depth (the amount of Program attenuation during a Page) from 50 dB (ccw) to 6 dB (cw). ZONE Output Meter displays PEAK signal levels at -10 dBu, +4 dBu, and +16 dBu. This concentric pot allows independent adjustment of Output Levels, or "stereo/master" level control by holding both the inner and outer knobs together. PWR indicator lights when the CP 31 is connected to a powered RS 1 power supply. Manual-2 CP 31 - REAR PANEL Chassis Ground Screw provides a convenient earth (technical) ground connection point. It is important that the unit be grounded (required by law in most installations). POWER jack accepts the mod plug from a Rane RS 1 remote power supply (included) or an optional Rane RAP 10 power supply. Use of a supply not approved by Rane may damage the unit and void the warranty. ZONE OUTPUT Port features a balanced line driver with a Euroblock connector. EXPAND OUTPUT Port features a balanced line driver with a Euroblock connector. EXPAND OUTPUT switch assigns PAGE-only or PROGRAM-only as the source for the Expand Output. EXPAND OUTPUT LEVEL trim adjusts the signal level delivered to the EXPAND OUTPUT. PROGRAM INPUT MONO switch, when pressed in, sums the left and right Program signals to provide a mono signal available at both A and B Zone Outputs. Mono program summing is before page summing, so A & B Paging Levels remain independent when MONO is engaged. PROGRAM INPUTS may be used as a stereo pair, or dual mono unbalanced sources. PAGING INPUT HIGH/LOW CUT FILTER switch, when IN, limits the bandwidth of the Paging Input from 100 Hz to 7 kHz, improving intelligibility in some installations. [. . . ] Note that with the Paging LEVEL set to minimum, the following Page will not be heard. Adjust the Paging TRIM control so that the Paging Overload indicator just lights. It is important to set the gain of the pre-amp before setting the Paging Detect Threshold. Speak into the Paging mic in a normal voice and adjust the Paging DETECT THRESHOLD so the ACTIVE indicator lights only during speech. [. . . ]