Gooch & Housego MLPXXX-YDC User manual

OPERATING MANUAL
DIGITAL DRIVER MODULE
MODEL NUMBER:
MLPXXX-YDC
Former Model Number: 21XXX-YDM
DOCUMENT NUMBER: 51A14095B
This Operating Manual is for use with AOM Drivers with model numbers:
XXX = a fixed frequency of between 27 and 300 MHz crystal controlled.
Y = 0.4, 1, or 2 Watts output D= Digital Modulation C= Contact Cooled OEM Module
For More Information, Contact: S
[email protected]
www.goochandhousego.com
As part of our policy of continuous product improvement we reserve the right to change specifications at any time.

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TABLE OF CONTENTS
Section Description Page
I. INSPECTION PROCEDURE 3
II. DESCRIPTION 4
III. SPECIFICATIONS 5
IV. OUTLINE DRAWING 6
V. CONTROLS AND CONNECTIONS 7
VI. TESTING PROCEDURE 8
OPERATING PROCEDURE 9

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SECTION I
INSPECTION PROCEDURE
Examine the shipping carton for damage. If the shipping carton or packing material is damaged it
should be kept for the carrier’s inspection. Check the contents of the shipment for completeness,
mechanical damage, and then test the equipment electronically. Operating procedures are contained in
Section VI. Notify the carrier and Gooch and Housego. If the contents are incomplete, or the equipment
does not pass the electrical testing please notify Gooch and Housego.
If there is any problem with the use of this equipment, or if the equipment fails to function as
expected contact Gooch and Housego, do not try to trouble shoot or repair this equipment. Consult with a
Gooch and Housego service engineer. If the equipment needs repair or replacement, contact Gooch and
Housego for a Return Authorization Number.

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SECTION II.
DESCRIPTION
The model MLPXXX-YDC is a crystal controlled RF frequency generator designed to supply a
signal of XXX MHz,where XXX is a fixed frequency of between 27 and 350 MHz, up to two Watts
maximum output and is used to drive the Gooch and Housego 15000, 23000, 24000, 26000 free space
series and fiber coupled series acousto optic modulators. The standard output power setting Yis typically
0.4, 1 or 2 Watts.
The output signal can be modulated by a Digital TTL external signal, applied to Digital
Modulation input. The output power is adjustable through the hole in the cover. If purchased with a
Gooch and Housego AO Modulator, the RF power will be preset for optimum performance. The unit is
supplied as a OEM module and requires the customer to supply 24 Volts to power the unit and the unit
must be attached to an adequate heatsink.
MLPXXX-YDC
53B2384 DIGITAL DRIVER MODULE

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SECTION III
SPECIFICATIONS
PARAMETER: SPECIFICATION:
Output Frequency: XXX MHz Where XXX = a fixed frequency of between 20 and 350
MHz
Frequency Stability: +0.01% Quartz Stabilized
Spurious Levels: -50 dBc Maximum
Harmonic Distortion: -15 dBc Maximum
Digital Input: TTL Levels: TTL HIGH = Full RF Power
TTL LOW = Minimum RF Power
Output Frequency: Rise Time* Fall Time* Extinction Ratio
Minimum RF Output Power: (Y) watts
Vcc as Factory Specified
PRF: 10 to 90 % PRF: 90 to 10 % 0.4 and 1 watt 2 watt version*
20 to 50 MHz < 30 ns < 30 ns > 50dB 0.4 to 1 2
50 to 150 MHz < 20 ns < 20 ns> 40dB 0.4 to 1 2
150 to 200 MHz < 10 ns < 10 ns > 30dB 0.4 to 1 1.5 2 *
200 to 350 MHz < 10 ns < 10 ns > 30dB 0.4 to 1 -
RF Output Power Adjustment Range Adjustable, 5 dB to maximum power
Factory Set for Optimum Performance when Paired with a AO device
Output Impedance: 50 Ohms nominal
Supply Voltage: + 24 VDC +0.5 volt *150 to 200 MHz Vcc = +28 VDC for 2 watts
Supply Current: 1 amp Maximum
MAXIMUM RATINGS:
Supply Voltage: + 28 volts for 1 watts *30 volts for 2 watts
Power Output: No DC Feedback Allowed
Case Temperature: + 550C
The Driver Must Be Attached to an Adequate Heatsink.
CONNECTORS & MECHANICAL:
RF Output Connector: BNC Female
Modulation Input Connector: BNC Female
Power Supply Connections Vcc Solder Post
Return Ground Lug
Physical Size: 4.8" L x 1.61" H x 3.87" W
RELATED DOCUMENTS:
Outline Drawing: 53B2384

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SECTION IV
OUTLINE DRAWING

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SECTION V
CONTROLS AND CONNECTIONS
A. RF Out BNC -Female
RF Power Output –The output is a factory set, crystal controlled, fixed frequency of between 20
and 350 MHz with an output power set nominally to 0.4, 1, or 2 Watts. When purchased with a
Gooch and Housego AOM the output power will be set to give optimum performance. It must be
terminated
with a 50 Ohm load capable of dissipating 2 Watts or an AOM of the same power capability.
B. Modulation Input BNC -Female
The modulation input accepts TTL level signal. A TTL HIGH = Full RF Power
and a TTL LOW = Minimum RF Power.
All above signals are referenced to the shield of the BNC connector.
C. Level Adjust
The level adjust is a factory adjustment, but is accessible through the hole in the cover.
Note: Do not adjust the output power above the value specified as maximum for the AOM as this
will result in damage to the AOM.
D. Power in Solder Post, and Ground Lug
+24 volts DC @ 1 Amp.
TOP VIEW

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SECTION VI
TESTING PROCEDURES
• With the power off, attach a 50 Ohm load capable of dissipating 2 Watts to the "RF Output" of the
unit. Apply +24 Volts to the 24V INPUT solder post of the module and return to the Ground Lug.
Apply a TTL High to the Modulation Input port through a 50 ohm cable.
• Measure the frequency and output power and other parameters of the driver. ( Note: power is
factory pre-set to match the Gooch and Housego AO device for optimum performance and is listed
on the AO device Acceptance Test Results form. Other parameters are listed on the Acceptance
Test Results form included with this driver.)
• Adjust, if necessary, the output power to the power level necessary for the AO device to be driven
for optimum performance. The adjustment is accessible through the hole in the cover.
Warning: The RF power should never exceed that specified for the AO Modulator driven.
See the AO device manual for power limitations and other warnings. If damage results due to
overpowering the AOM, the warranty will be void.
• Apply a TTL modulating signal to the Modulation Input.
Measure the RF output for specifications for this driver as listed in the Acceptance Test Results
form included with this driver.
• The driver has been designed and has been tested to meet the specification. Notify Gooch and
Housego if the driver does not pass the electrical testing.

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OPERATION PROCEDURE:
• The driver should be pre-set to output RF power at the required power level for the AOM.
• With the power off, attach the Gooch and Housego 15000, 23000, 24000, or 26000 free space or
fiber coupled acousto optic modulator or other acousto optic modulator device to the driver with a
50 Ohm cable.
• Apply +24 Volts to the 24V INPUT solder post of the module and return to the Ground Lug.
• Apply a TTL High to the Modulation Input port through a 50 ohm cable.
• Follow the instructions in the AO Modulator manual to align and adjust the optical
modulator, as required for optimum performance.
• Apply a TTL signal to the Modulation Input as desired.