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FM-55 / Aug 2014
G E N E R A L I N F O R M A T I O N
GPIO - RJ-45
The pin assignment for the rear panel RJ-45 GPI connector is as follows:
Pin 1 – GPI I IN +
Pin 2 – GPI 1 IN -
Pin 3 – GPI 2 IN +
Pin 4 – GPI 2 IN -
Pin 5 – GPI 1 OUT +
Pin 6 – GPI 1 OUT -
Pin 7 – GPI 2 OUT +
Pin 8 – GPI 2 OUT -
Processing Presets
The AM-55 comes equipped with several dozen factory presets and can hold a total
of 80 presets in its onboard memory. Customer-created presets may be saved within the
AM-55’s onboard memory until all preset storage slots are full. An unlimited number
of presets can be stored on the PC that hosts the Windows-based remote control GUI
software.
In order to prevent annoying clicks and pops when changing presets, preset parameters
are slewed between the current values and the new values whenever a new preset is
taken, and it may take several seconds for the new settings to completely settle in. It is
important to remember this concept!
The AM-55’s preset behavior is purposely designed to make preset changes as
unobtrusive as possible and therefore parameter changes are not instantaneous, but
gracefully take place over a matter of seconds. This factor
must be taken into consideration
whenever switching back and forth between presets in order to compare them!
When a preset has been recalled and has not been modified the preset’s name is
displayed in green text within the GUI’s current preset window. If changes to the preset
have been made its name will be displayed in red text instead of green. Once the modi-
fied settings have been saved back to the AM-55’s hardware the preset name will again
be displayed in green.
Factory presets can be re-tuned and saved as new preset names in order to create a
completely different air sound. The factory presets are write-protected and changes made
to them cannot be written back to the same memory location. Factory presets that have
been modified are considered by the system to be “user” presets and therefore must be
saved as a new name and in a new preset storage slot.
Our advice is to start with a factory preset that has the on air sound that is closest
to what you believe you need. If changes are necessary, the best approach is to make
small changes, one or two at a time, and then listen for quite a while before deciding
that more changes are necessary. A consultant friend of ours advises: “Tweak small and
then listen large.”
NOTE:
Preset storage is as follows:
- Factory presets are installed beginning with a BYPASS stored in slot #1. Factory
presets cannot be written over or deleted.
