User manual RANE RPM 26Z

[. . . ] The LINK LED on the rear panel should be lit. If it is not, verify that you are indeed using a crossover cable, not a standard Ethernet cable. A standard Ethernet cable should only be used if you are connecting the RPM 26z and a computer indirectly using an Ethernet switch. Launch the Drag Net application and follow the steps to create a new project and new RPM 26z device configuration. [. . . ] 5 VERSATILE INPUT PORT provides 8 logic or voltage inputs for remote level control and Preset recall on a Euroblock connector. See Control Connections on page Manual-4. 6 LAN and LINK reflect the state of the Ethernet connection. LINK lights solidly when a valid connection to another Ethernet device (e. g. , a PC) is detected. LAN flashes when communicating with another Ethernet device. 7 10Base-T jack accepts a standard Ethernet cable with a RJ-45 connector. See Control Connections on page Manual-4. 8 DEFAULT button recalls Preset 1 when pressed. Holding this button while applying power puts the unit into a codeload mode for updating firmware. Manual-2 Audio Connections For each Input or Output Euroblock connector: · Connect the (positive) audio line to the `+' terminal. · Connect the (negative) audio line to the `­' terminal. · Connect the cable shield to the ground terminal. For those installations where the RPM 26z's internal shieldto-chassis connection causes interference, connect each shield directly to the chassis PEM nut located above each Euroblock connector, keeping the shield wrapped around the audio conductors as much as possible. For optimum Electromagnetic Interference (EMI) immunity, connect the shields at both ends of the cable. See the RaneNote "Sound System Interconnection" for more information on system connections and proper grounding practices. Analog Input Stage Each analog input uses a two-stage gain approach. The first stage contains a variable gain preamp. The second stage contains a Digital Trim control located immediately after the A/D converter. Input Clipping If you've set the Analog Gain so the input stage is not clipping, it is not possible to clip the A/D converter, since there is no additional gain between the initial input stage and the A/D converter. The Digital Trim control, located after the A/D converter, can be set to clip the signal to your heart's content, so adjusting this trim to provide the hottest signal to the DSPs without clipping is the most important step when setting up gain structure. For this reason, a dedicated meter displaying the signal level being passed to the DSPs is provided in each Analog Input block. If the DSPs are working with a clipped signal, the audio is (as expected) distorted and none too pretty, but it is not a drastic, damaging sound. And while it's technically possible to write a DSP algorithm to emulate the glorious clipping distortion of vacuum tubes, it's not particularly useful for an installed sound system, where the DSP power could be put to better use removing that annoying 500 Hz feedback from the podium mic. [. . . ] Combinations of Preset switches & voltage Level "pots" are possible as long as combined, they do not exceed the eight pins provided. Since you can Group any or all Level blocks in Drag Net's Remote Map, it's much easier to implement a stereo level control since the Drag Net device is burdened with the task of tracking many Levels. You can use this to your advantage when using VIP pins to adjust multiple zones or levels. Since you can place the Level block anywhere within the Drag Net Processing Map, you can Group Level blocks at the input, at the output or anywhere in-between -- just place the Level block where you want it. [. . . ]