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4 Advanced Configuration
The 7800 series amplifier was designed to offer
exceptional power and versatility in operation. You
can choose from a range of field-configurable op-
tions, including:
•
Select DC-coupled or AC-coupled operation.
•
Select Controlled-Current or Controlled-Voltage
modes of operation.
•
Enable a 50-kHz low-pass filter.
•
Change the maximum amplifier gain from 20:1
to 6:1.
•
Configure the amplifier to enter Standby on
startup
•
Configure the amplifier to enter Standby when
an overload condition occurs.
•
Configure the bi-level power supply for use in
high voltage applications, high current applica-
tions, or for applications requiring mid-level
amounts of both voltage and current.
Configurations settings are made using the eight
DIP switches located on the amplifier's main circuit
board, using shunts across jumper pins located on
the main circuit board, or by plug and switch set-
tings on the amplifier's power supply board. These
controls can be used to alter the amplifier opera-
tion from the factory defaults.
4.1 Factory Defaults
Your 7800 series amplifier has been configured to
operate to the following factory defaults:
•
DC-coupled operation
•
Controlled-Voltage mode
•
CC1 Compensation network
•
Low-pass filter disabled
•
Power supply configured for mid-level opera-
tion
•
Power-Up into Ready mode
Standby Mode on Overload disabled
•
If you need to make changes to your amplifier's
configuration, please follow the instructions con-
tained in this chapter for accessing the main board
DIP switches and jumpers, and the power supply
board settings..
20
The main and power supply boards can be ac-
cessed by removing the amplifier module's front
panel. To remove the front panel for each module,
complete the steps detailed in the following sec-
tion.
4.2 Accessing the Main Board
The amplifier Main Board can be accessed by
removing the module's front panel.
IMPORTANT: Before removing the front panel,
make sure the amplifier system is turned off for at
least 3-5 minutes and the AC mains are discon-
nected.
Tool Required
Torx T15 driver
Procedure
1. Turn the power to the amplifier system "OFF".
2. Remove the four hex-head screws, located
along the left and right edges of the amplifier
module's front panel using a Torx T15 driver.
3. Remove the front cover by pulling straight
towards you.
4.3 Configuration Settings Controlled
The 7800 series provides eight DIP switches lo-
cated on the main board of each amplifier module.
Most configuration settings can be made using
Information subject to change
7800 SERIES OPERATION – SECTION 4
WARNING
Do not attempt to access the Main Board
while the amplifier is running. Turn the
amplifier off and disconnect the AC
Mains before removing the amplifier
front panel.
CAUTION
After turning the amplifier off, let the unit
sit for 3-5 minutes before removing the
front panel. This will allow the electrical
charge in the Power Supply capacitors
to discharge.
by DIP Switches
96-8007105_07-14-23
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