Page 18
MICROPHONE PREAMPLIFIER
Page 19
Instruction Manual
4. FUNCTIONS IN DETAIL
Enable Limiter
Enabling the LIMITER engages the proprietary Microphone Output Limiter (MicLim™)
which virtually eliminates the possibility of input overload. The MicLim provides up to
20dB of additional headroom. When the MicLim is inserted into a selected channel, the
corresponding LIM ON LED indicator will illuminate on that channel’s status readout as
well as the ENABLE LIMITER button. In the event the input exceeds the limiter threshold,
the CLIP/LIM indicator will illuminate.
Multiple Select
Normally, the preamp functions are controlled on a channel by channel basis. The
MULTIPLE SELECT button allows group control.
Activating MULTIPLE SELECT lets you chose any combination of the 8 channels for
simultaneous function control. Press any channel button to add it, and press again to
remove it.
When channels are added to the group, the function buttons of the Local Block will light
up to display the status of the lowest numbered channel. Other added channels do not
change status, and remain as they were until one of the function buttons in the Local
Block is pressed. Then, all grouped channels will take up that particular function state.
All uncommanded functions of the grouped channels will remain in their prior individual
state.
4.2 CONTROL BLOCK
Note:
The first time any function button is depressed, it
will not change status of the selected function, it will only
indicate its current status in the global status readout.
Global Status Readout
The six-digit display of the global status readout indicates whatever data value is relevant
to functions that are presently selected for control or view in the Control, Digital or
Monitor Blocks.
Adjust/Store
This button enables the adjustment and storing of the Channel, Device, and Net numbers
that this specific 1788A will respond to for remote control. To provide a level of protection
from inadvertent modification of the settings, the procedure for using this button has
been made quite specific and you should become thoroughly familiar with it to avoid
confusion.
The Adjust/Store button is inactive if it is not lit. You cannot light it just by pressing it alone.
You must first select a parameter to adjust.
That is a measure of protection from
inadvertent misconfiguration of the Channel, Device, and Net numbers which are critical
to successful remote control.
