97-2105006_4-2-15
Information subject to change
25
2105 OPERATOR’S MANUAL –
SECTION 6
If your load inductance falls outside of the mid-
range, or if your load resistance is greater than
5 ohms, then you must calculate your required
compensation. If, after calculating your required
compensation, you determine that the default com-
pensation will be insufficient for your load, then
you will need to enable and install a custom RC
network. See
STEP 6
below.
STEP 4: Enabling Your Compensation
Setting.
AE Techron 2100 Series amplifiers can be enabled
with one of two compensation settings: default
RC network or custom RC network. The required
network can be selected via jumpers on the main
board. CC1 enables the default (factory-installed)
RC network, while CC2 allows installation of a cus-
tom RC network.
Figure 6.3
describes the default
RC circuit.
To select CC1, place jumper J5 in the UP posi
-
tion; to select CC2, place jumper J5 in the DOWN
position. (For jumper location, see the
”Advanced
Configuration”
section.)
IMPORTANT: If CC2 is selected, you must cal
-
culate the compensation requirements for your
custom RC network and install the network on
your amplifier main board before operating the
amplifier in CC mode.
STEP 5: (Optional) Verify Suitability of
Default Compensation (CC1)
If desired, the following values of the components
contained in the default RC network can be used
with the formulas provided in
STEP 6
below to
verify the suitability of the default compensation for
your uses.
Pins Jumped:
1 and 2 (UP)
Compensation Resistor:
R63 (68 Kohms)
Compensation Capacitor:
C16 (0.047 µF)
Parallel Capacitor:
C11 (47 pF)
STEP 6: Installing an RC Network for
Custom Compensation
If the default RC network does not provide suit-
able compensation for your intended load, you
will need to install a custom RC network that is
matched to your load. This network will require two
components (a resistor (R) and a capacitor (C))
to be installed on the main board. To calculate the
approximate values required for each component,
use the following formulas.
COMPENSATION FORMULAS:
To find the value for the resistor (Rc) in the RC
network:
Rc = 20,000 x 3.14 x L x BW
where:
Rc
is compensation resistance in ohms.
L
is load inductance in henries.
BW
is bandwidth in hertz.
To find the value for the capacitor (Cc) in the
RC network:
Cc = L/ (R x Rc)
where:
Cc
is compensation capacitance in farads.
L
is load inductance in henries.
R
is resistance of load in ohms.
Rc
is compensation resistance in ohms.
STEP 7: Optimizing the Compensation
Values.
Once an approximate Rc and Cc have been
computed, these values will need to be evaluated.
To do this, install components with the required
values in the main board at locations R82 and C25
as shown in
Figure 6.4.
Remember the load you are connecting is a
part of the system and the amplifier should not
be turned on without the load being connected.
After installing the components, check to ensure
that jumper J5 is correctly installed (see
STEP 4
),
then power up the amplifier without signal input.
