Service manual

XSP (SSP818-067)
CARD DESCRIPTION
The XSP signal processing card consists of four groups of 32bit floating point DSP devices.
Each group has a dedicated coefficient interpolation processor. Three of the groups
perform path processing and have two Path Worker processors, the fourth group is
dedicated to mix processing and has just one Mix Worker.
To support the processing groups, there are three further DSPs. The Calculator produces
and distributes coefficients around the DSP groups. The Worker configures and controls
data distribution activities and the Root manages booting and backplane communication to
other system elements via a mezzanine site.
Audio data enters and leaves the card through four 32 bit time division multiplexed, ASIC
controlled backplane busses.
LED INTERPRETATION
The front panel LED indicators are arranged along the underside of the
front edge of the XSP.
Power Power Available to XSP
Reset Card in Reset
Root Processor Flag3 ROOT Sharc running from ROM
Comm Mezzanine 0 ACTEL Link 0 (External Comms)
Comm Mezzanine 1 ACTEL Link 1 (External Comms)
Comm Mezzanine 2 ACTEL Link 2 (External Comms)
Comm Mezzanine 3 ACTEL Link 3 (External Comms)
Worker Flag3 Worker Sharc Link (Internal comms)
Worker LED 0 NOT USED
Worker LED 1 NOT USED
Calc Flag3 Calculator Sharc Link (Internal Comms)
Mix Coefficient
Processor Flag3 Mix Coeff Running Flag
Mix Worker Processor
Flag3 Mix Worker Running flag
Mix Status 0 NOT USED
Mix Status 1 NOT USED
Mix Status 2 NOT USED
Digital Service Manual
Issue 3 Page 20