Service manual

reduced headroom levels this will generally be true, for example with headroom set to 18dB
the limiter will begin to work at +17dBu line input. It will then be possible to put up to the
maximum +26dBu signal into the input while the limiter keeps the signal to around -1dBFS.
Alternatively in the same situation the user could set the line input gain trim to +10dB and all
input signals from +8dBu up to +18dBu will be limited to -1dBFS.
An option is available to replace the 24dB setting with a 22dB headroom setting. This board
is part number SPN815A121 and is shipped in module AM4624/22DB. The modification
involves replacing R349 and R350 with 12k7.
Digital Service Manual
Issue 3 Page 34