7000-SERIES MULTI-AMP CONFIGURATION GUIDE
10
Information subject to change
97-8002465_06-09-14
Figure 3.7 – Terminating the Amplifier Input
3.7
Series System
Wiring
Locate the Series configuration that you have selected to meet your application requirements:
Section 3.8
for a Two-in-Series – Differential configuration or
Section 3.9
for a Two-in-Series – Open-Ended
configuration. Then follow the steps provided to wire and test your 7000-Series Multi-amp System.
3.8
Two in Series – Differential
Complete the following procedures to connect your amplifiers for
Two in Series - Differential
operation.
3.8.1
Connect and Test DC Offset and Interlock
Using a
DB-9 high-voltage interlock cable,
connect from the
1.
MASTER OUTPUT connector on the SIM-BNC-OPTOC card of the
Master amplifier to the SLAVE INPUT connector on the SIM-BNC-
OPTOC card of the Slave amplifier.
Using wiring appropriate for your application, load and expected
2.
output, connect from the MASTER amplifier’s back-panel output
connector labeled COM (7224) or SAMPLED COMMON
(7548/7796) to the SLAVE amplifier’s COM/SAMPLED COMMON
connector.
On the MASTER amplifier, connect the output wiring to the back-
3.
panel output connector labeled OUTPUT. On the SLAVE amplifier,
connect the output wiring to the back-panel output connector
labeled OUTPUT.
IMPORTANT: DO NOT connect the load at this
time.
Terminate the input of the Master amplifier using the resistor-
4.
terminated barrier block connector (see
Figure 3.7
) or similar
device.
Power up each amplifier by switching to ON the front-panel ON/OFF switch (7224 amplifiers) or moving
5.
the back-panel AC Mains Switch/Circuit Breaker to the ON (up) position (7548/7796 amplifiers). Allow
the amplifiers to come to the Ready state. When Ready, the amplifier Ready and Run LEDs will be lit.
Note: Some amplifiers that have been custom-configured may require that you press the Enable button
to bring the amplifier to the Ready state. Let the amplifiers run for several minutes in Ready state to
allow DC offsets to stabilize.
Using a digital voltmeter set to DC, measure across each amplifier’s back-panel output connector
6.
terminals (OUTPUT to COM or SAMPLED COMMON) to verify that the DC offset of each amplifier is less
than 10 mVdc. See
Figure 3.8.
NOTE: If any amplifier’s DC offset is greater than 10 mVdc, the amplifier
may require servicing. Contact AE Techron Technical Support.
On the Master amplifier only, press the Stop button to place the amplifier in Standby mode.
7.
Verify that both Master and Slave amplifier enter Standby mode (Standby LED is lit).
8.
3.8.2
Test Amplifier Gain
With the amplifiers in Standby mode, remove the input signal terminator and connect a signal generator
1.
to the BNC or Removable Barrier Block connector on the SIM-BNC-OPTOC card of the MASTER amplifier
ONLY.
Apply a sine wave of 5 Vrms at 100 Hz at the Master amplifier input. Using a voltmeter measure across
2.
each amplifier’s back-panel output connector terminals (OUTPUT to COM or SAMPLED COMMON) to
verify an output from each amplifier of approximately 100 Vrms (gain of 20). See
Figure 3.9.
NOTE: If
any amplifier’s gain varies significantly from the set gain of 20, the amplifier may require servicing.
Contact AE Techron Technical Support.
ELECTRIC SHOCK HAZARD. Output potentials
from the amplifiers can be lethal. Make
connections only with amplifiers’ AC power
OFF and input signals removed.
