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ConOptics, Inc. 19 Eagle Road, Danbury, CT 06810 Phone 800-748-3349 Fax 203-790-6145
Email: [email protected], or visit www.conoptics.com
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Model 200 Manual
Introduction:
The Model 200 drive electronics is a high power (75W) AC Coupled amplifier capable of output
voltages of 170V Peak-to-Peak. The Model 200 provides an output frequency response of
10KHz-to-200MHz into a 50ohm load.
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ConOptics, Inc. 19 Eagle Road, Danbury, CT 06810 Phone 800-748-3349 Fax 203-790-6145
Email: [email protected], or visit www.conoptics.com
2
Technical Overview:
The Model 200 drive electronics is an AC coupled, amplifier. The amplifier is capable of
outputting 170volts P-P into a 50 ohm S.E. load. The driver is designed to interface to Conoptics
2-port 50 ohm Electro-Optic Modulators and beam deflectors. The amplifier requires only
626mv (0dbm) P-P input signal into 50 ohms to deliver its maximum output drive. The
termination for the transmission line is (a 50 ohm 150W termination). The output signal of the
amplifier is delivered to the E.O. Modulator via 50 ohm coax cable. This signal propagates
through the modulator and then returns to the load. There is little or no electrical power
dissipated in the E.O. Modulator.
As with any AC Coupled amplifier, the output power will be affected by the duty cycle of the
input wave form. Max power will be 50% duty cycle inputs. For example, when the duty cycle
goes from 10%-to-90%, the output capability of the driver is affected by operating point shifts
within the amp. These types of amplifiers are best suited for 50% duty cycle input signals.
Note: If the amplifier is over-driven such that the output state goes into saturation and cut-off,
substantial “storage delays” may result. The amplifier may take hundreds of microseconds to
recover. Do not attempt to increase the input level beyond 0dbm limit.
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ConOptics, Inc. 19 Eagle Road, Danbury, CT 06810 Phone 800-748-3349 Fax 203-790-6145
Email: [email protected], or visit www.conoptics.com
3
Detected response
Below is the typical detected response for the Model 200 driving a Model 350-80 Electro-Optic
Modulator.
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ConOptics, Inc. 19 Eagle Road, Danbury, CT 06810 Phone 800-748-3349 Fax 203-790-6145
Email: [email protected], or visit www.conoptics.com
4
Typical System Configuration
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ConOptics, Inc. 19 Eagle Road, Danbury, CT 06810 Phone 800-748-3349 Fax 203-790-6145
Email: [email protected], or visit www.conoptics.com
5
DC Bias Amplifier
A variable DC Bias Voltage Control is included to allow the end user to set the operating point of
the Electro-Optic Modulator on the sin2 transfer function. This capability is roughly +/- 450VDC
and is adjustable by the front panel pot and monitored by the built in LCD Voltage Meter.
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