User manual ROLLS MX422

[. . . ] LIMITED WARRANTY This product is warranted to the original consumer purchaser to be free from defects in materials and workmanship under normal installation, use and service for a period of one (1) year from the date of purchase as shown on the purchaser's receipt. The obligation of Rolls Corporation under this warranty shall be limited to repair or replacement (at our option), during the warranty period of any part which proves defective in material or workmanship under normal installation, use and service, provided the product is returned to Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products returned to us or to an authorized Service Center must be accompanied by a copy of the purchase receipt. In the absence of such purchase receipt, the warranty period shall be one (1) year from the date of manufacture. [. . . ] LIMITER The MX422 Limiter acts as a "safety" limiter. During normal operation, with a properly set gain structure, the threshold of the limiter will not be reached. If extremely high input signal levels exist, such as in high SPL environments or with misadjusted settings, the limiter will activate to prevent the channel from clipping. Without a limiter, high signal conditions would overload the channel and cause distortion. Adjust the LIMITER THRESH control to a point above your normal operating levels, but safely below levels causing distortion or "pegging" of the VU meters. METERING The MX422 features two calibrated, backlit VU meters. VU (Volume Units) meter ballistics correspond closely to how the human ear perceives loudness and provides a good visual indication of how loud a signal will be. The attack and decay of the meter signal is 300 mS. The indicated level on the meters is referenced to +4 dB. SLATE TONE AND MICROPHONE The Slate Tone and Microphone circuit is used to notate scenes at the mixer location. The Slate circuit uses the front panel momentary button. When this button is pressed, a 20Hz tone is sent to the Main Outputs, and the Slate Microphone becomes active. When notating a scene - press and hold the Slate button, speak into the four-holed Slate microphone, and release. 1kHz TONE This oscillator is provided to set the gain structure between the MX422 and the next device in your signal chain. The Tone oscillator is set to output a 1 kHz sine wave to the Main Right and Left outputs (with the Output Level switch set in the out or LINE position). Note this tone is also sent to the Headphone outputs when the Headphone SOURCE button is in the MAIN position. It would be a good idea POWERING To power the MX422 and get it ready for operation: 1. Insert four 9-Volt alkaline batteries into the battery compartments. NOTE: Only one pair of batteries is being used at a time. Or, connect external DC power (the Rolls PS27) 12 VDC to the MX422 DC Input connector. Check battery life by pressing the BATT button. INPUT CHANNEL SETUP To set up a gain level for an input channel: 1. Connect a signal source (microphone or line level signal) to a channel input connector. [. . . ] Proper battery voltage will be indicated with the meters moving to the red region of the field. If the meters are below the red region, battery replacement is necessary. HEADPHONE LEVEL: Adjusts the level of signal from the Headphone Outputs. HEADPHONE SOURCE SELECT SWITCH: When this button is OUT, the sound heard at the Headphone Outputs will be that of the Main Output, when it is pressed IN, the sound heard will be that of the Monitor Input. [. . . ]