96-8005549_3-18-21
Information subject to change
17
8508 OPERATOR’S MANUAL – SECTION 5
ing a custom compensation network, see Section
5.2
“Internal Configuration.”
For more informa
-
tion on Controlled-Current operation, including
instructions for selecting the best RC components
for your network, see the topic “Controlled Cur-
rent Operation” in the
Applications
section of this
manual.
SW#5: Compensation Network 2
When the 8500 series amplifier is used in Con-
trolled-Current mode, the current control loop is
tuned with an RC network. The factory default
network (Compensation Network 1) provides
100k ohm resistance and 2.2 nF capacitance and
should be used with loads that are 75
μ
H to 500
μ
H.
If this default network is not adequate for your
application and load, the Compensation Network
1 switch can be turned off and the Compensation
Network 2 switch can be used to enable a network
that provides 100k ohm resistance and 10 nF ca-
pacitance and should be used with loads that are
500
μ
HH to 2 mH.
If neither compensation network is adequate for
your requirements, a custom compensation net-
work can be installed by the user in place of the
through-hole components that populate the Com-
pensation 2 network. For information on installing
a custom compensation network, see Section 5.2
“Internal Configuration.”
For more information
on Controlled-Current operation, including instruc-
tions for selecting the best RC components for
your network, see the topic “Controlled Current
Operation” in the
Applications
section of this
manual.
NOTE:
Enable ONLY Compensation Network 2
(SW#5) or Compensation Network 1 (SW#6). Both
compensation networks should NOT be enabled
simultaneously.
SW#6: Compensation Network 1
When the 8500 series amplifier is used in Con-
trolled-Current mode, the current control loop is
tuned with an RC network. The Compensation
Network 1 switch enables the factory default RC
network. This provides 100k ohm resistance and
2.2 nF capacitance
and should be used with loads
that are 75
μ
H to 500
μ
H. If this default network
is not adequate for your application and load, the
Compensation Network 1 switch can be turned off
and the Compensation Network 2 switch can be
used to
enable a network that provides 100k ohm
resistance and 10 nF capacitance and should be
used with loads that are 500
μ
H to 2 mH.
If neither compensation network is adequate for
your requirements, a custom compensation net-
work can be installed by the user in place of the
through-hole components that populate the Com-
pensation 2 network. For information on installing
a custom compensation network, see Section 5.2
“Internal Configuration.”
For more information
on Controlled-Current operation, including instruc-
tions for selecting the best RC components for
your network, see the topic “Controlled Current
Operation” in the
Applications
section of this
manual.
NOTE:
Enable ONLY Compensation Network 2
(SW#5) or Compensation Network 1 (SW#6). Both
compensation networks should NOT be enabled
simultaneously.
SW#7: Control Configuration
IMPORTANT:
Do not change the Control Con-
figuration switch on any 8500 series amplifier
Master or Follower module unless instructed
by AE Techron Technical Support. Product
failure could occur.
When this switch is in the UP position, the ampli-
fier module functions as a Master amplifier mod-
ule. When this switch is in the DOWN position, the
amplifier module functions as a Follower amplifier
module.
SW#8: Coupling
When the Coupling DIP switch is in the UP posi-
tion (default), the amplifier can receive and amplify
both DC and AC signal. When this switch is in the
DOWN position, a 30-Hz high-pass filter on the
inputs prevents the transmission of DC signal.
SW#9 – SW#16: Gain
The amplifier gain can be adjusted from 0.16 to 40
in increments of 0.16 using switches 9 through 16.
Summary of Contents for 8500 Series
Page 2: ......
