[. . . ] This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. [. . . ] Note that IR Input and Output is a bit of a misnomer: the input and output of these plugs is electrical in nature, not infrared. They are used with standard IR receivers, distribution amplifiers, and emitters (available from your dealer) to translate the remote's IR signal to an electrical signal and vice versa. The big advantages here include being able to easily route the signals anywhere they might need to go and the reliability of a solid electrical connection. Since an IR distribution system such as your dealer may design for you usually must control many products, your preamplifier includes both an IR input (for the control of this product) and an IR output (so as to pass along the same signal to the next product). This allows you to "daisy chain" your control wires from one product to the next. DC Trigger Input and Output Many audio/video components can supply a DC control voltage to associated equipment in order to induce desired behavior. Your Classé preamplifier can take advantage of these capabilities in order to be switched between operate and standby automatically, usually in concert with the A/V preamp itself. the 1/8th-inch mini mono-jack Trigger In provides for remote-controlled turnon (that is , toggling between operate and standby) of the preamplifier. Two 1/8th-inch mini mono-jacks provide individually controllable DC trigger outputs which can be used for any of a number of purposes, as described in The Menu System. For example, your dealer can program Trigger Out1 to toggle your Classé power amplifier between operate and standby with your CP-500. Similarly, the trigger outputs will create a 12VDC signal that can source up to 100mA of current. If you press Menu when at the top level of the menu system, it will take you back out of the menu system to the normal display. The Bal (balance) key takes you directly to the balance screen in the menu system; once there, you can use the navigation keys on the remote to select either the left or right buttons on the LCD touchscreen, depending on which way you wish to move the balance. Adjust the relative left-right balance of the system by using the Enter key on the remote to "press" the appropriate button on the display. Up/Down/Left/Right keys allow you to move within a particular menu screen, changing the highlighted item up/down/left/right as you like, from the comfort of your listening position. The Enter key allows you to select the highlighted item, having the same effect as if you had pressed the button on the LCD touchscreen. The F1/F2/F3/F4 keys are available for controlling aspects of the CP-500 not covered by the other buttons on the remote control. You are able to choose what the CP-500 should do in response to receiving the infrared signal that a particular Fkey has been pressed. The list of possible functions is quite extensive, and is found in the menu system (see the next section in this manual, entitled The Menu System). This saves you from having to be sure you have picked up the proper remote, since all your Classé remotes will perform the same function for each Fkey. Your CP-500 includes a versatile LCD touchscreen which supports both an attractive information display and a flexible menu system. This section of the owner's manual outlines the many capabilities found in the menu system. [. . . ] If any source components connected to your preamplifier has a cable TV hooked up to it, try disconnecting the cable television line from the source. If the hum goes away, you will need an isolation device between your cable and that particular source. Refer to your Classé dealer for one of these inexpensive devices. If you have the optional phono module in your preamplifier, make sure that the ground wire of the tonearm is secured properly to the ground lug on the back of your preamp. [. . . ]