User manual RME FFACE800WIN

[. . . ] User's Guide Fireface 800 The most powerful FireWire audio interface ever! TotalMix 24 Bit / 192 kHz ü SyncAlign ® TM ZLM ® SyncCheck TM ® SteadyClock FireWire 800 / 400 Digital I/O System 10 + 16 + 2 Channels Analog / ADAT / SPDIF Interface 24 Bit / 192 kHz Digital Audio 56 x 28 Matrix Router MIDI I/O Stand-Alone Operation Inhalt Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 System Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Brief Description and Characteristics. . . . . . . . . . . . . . . . . . . [. . . ] Based on the highly efficient jitter suppression, the Fireface refreshes and cleans up any clock signal, and provides it as reference clock at the BNC output (see section 24). Input The Fireface's transformer isolated word clock input is active when Pref. Sync Ref in the Settings dialog has been switched to Word Clock, the clock mode AutoSync has been activated, and a valid word clock signal is present. The signal at the BNC input can be Single, Double or Quad Speed, the Fireface 800 automatically adapts to it. As soon as a valid signal is detected, the WC LED is lit, and the Settings dialog shows either Lock or Sync (see chapter 30. 1). Thanks to RME's Signal Adaptation Circuit, the word clock input still works correctly even with heavily mis-shaped, dc-prone, too small or overshoot-prone signals. Thanks to automatic signal centering, 300 mV (0. 3V) input level are sufficient in principle. An additional hysteresis reduces sensitivity to 1. 0 V, so that over- and undershoots and high frequency disturbances don't cause a wrong trigger. The Fireface's word clock input is shipped as high impedance type (not terminated). A push switch allows to activate internal termination (75 Ohms). The switch is found on the back beside the word clock input socket. Use a small pencil or similar and carefully push the blue switch so that it snaps into its lock position. The yellow LED will be lit when termination is active. Another push will release it again and de-activate the termination. Output The word clock output of the Fireface is constantly active, providing the current sample frequency as word clock signal. As a result, in Master mode the provided word clock is defined by the currently used software. In all other cases the provided frequency is identical to the one present at the currently chosen clock input. When the current clock signal fails, the Fireface 800 switches to Master mode and adjusts itself to the next, best matching frequency (44. 1 kHz, 48 kHz etc. ). Selecting Single Speed in the Settings dialog causes the output signal to always stay within the range of 32 kHz to 48 kHz. So at 96 kHz and 192 kHz sample rate, the output word clock is 48 kHz. The received word clock signal can be distributed to other devices by using the word clock output. With this the usual T-adapter can be avoided, and the Fireface 800 operates as Signal Refresher. [. . . ] Add the doubled (quadrupled) bandwidth, and a wideband measurement will show a siginificant drop in SNR, while the human ear will notice absolutely no change in the audible noise floor. 28. 7 SteadyClock The SteadyClock technology of the Fireface 800 guarantees an excellent performance in all clock modes. Thanks to a highly efficient jitter suppression, the AD- and DA-conversion always operates on highest sonic level, being completely independent from the quality of the incoming clock signal. SteadyClock has been originally developed to gain a stable and clean clock from the heavily jittery MADI data signal (the embedded MADI clock suffers from about 80 ns jitter). Using the Fireface's input signals SPDIF and ADAT, you'll most probably never experience such high jitter values. [. . . ]