Compact Low Power RF Driver:For Acousto-optic Q-Switch orModulator
QCXXX-YYDC-ZZZ-AAV
Former Model Numbers:
R390XX-YYDMZZZ &MQC0XX-YYDCZZZ-AAV
Description:
The QCXXX-YYDC-ZZZ-AAV module is a compact Low Power RF Driver, designed to drive an AO Q-Switch or AO Modulator. The unit has two digital modulation inputs: Fixed and Variable. These controls allow the customer to issue a pulse command of a "Fixed" pulse width,the duration determined by the Driver's pulse width control, settable by the customer, or issue a "Variable" pulse command, the duration determined by the input signal’s pulse width. The output power is controlled by the analog input, where the mode of operation is defined by ZZZ = A05 normal analog mode, or R05 analog switched to full RF mode or a triggered RF Ramp Down mode where ZZZ = FPS first pulse suppression mode or PPK pre-pulse kill mode.Other variations of these modes are also available. The choices of Frequency (XXX),Output Power (YY), and Power Control (ZZZ)option are "Factory Set" when ordered. This driver has a Zero Crossing function where the output pulse can be synchronized to the zero crossing point of the RF Energy. When enabled the pulse to pulse stability is improved.
This product conforms to the requirements of the European Union Directive 2011/65/EU of the European Parliament and of the Council on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment.
Key Features:
- 24, 27.12, 40.68, 68, 80, or 110 MHz RF Frequency (XXX)
- 0.01% Quartz Stabilized
- Up to 24 watts RF power output (YY)
- Two TTL Digital Modulation Inputs: fixed and variable pulse width.
- Up to 1 MHz pulse rate in Q-Switch applications.
- Up to 10 MHz pulse rate in pulse picking applications
- Analog Modulation or Triggered RF Ramp Down Mode (ZZZ)
- Synchronization to RF by ‘Zero cross’
- Fault Protection on Low Power, High Power, and High VSWR
- Operates on 12, 15 or 24 VDC (AAV) (Factory set)
Applications:
- Powering an Acousto-Optic Q-Switch used to spoil the “Q” of a
CW laser so as to output an intense pulse of light.
- Powering an Acousto-Optic Modulator to pick pulses out of an
optical pulse train
Output Frequency:
Where RF Frequency =
XXX = 024, 027, 041, 068, 080, or 110 as standard 24.00,
27.12, 40.68, 68.00, 80.00, or 110.00 MHz ± 0.01%
Spurious Levels:
-50 dBc Maximum
Harmonic Distortion
-20 dB Maximum for units with output power <15 watts
-15 dB Maximum for units with output power >15 watts
Modulation Input:
Mod In Fixed (pin 3 )
Standard
Inverted digital input option (NEG)
Mod In Variable (pin 5)
Standard
Inverted digital input option (NEG)
TTL Levels, (Minimum Pulse Width 50 ns)
Triggered on Rising Edge
Triggered on Falling Edge
TTL Levels
HIGH = RF Off
LOW = RF Off
Extinction Ratio:
50 dB Minimum
RF Rise Time 10% to 90%, into 50 ohm resistive load
≤35 ns
RF Fall Time: 90% to 10%, into 50 ohm resistive load
≤ 35 ns
Modulation Repetition Rates:
1 Hz to 1 MHz for Fixed Modulation
DC to 10 MHz for Variable Modulation
Fixed Modulation Output Pulse Width Adjustment Range:
1 to 20μs, Customer Adjustable
Available Pulse Suppression Modes:
Modulation Operating Mode is "Factory Set" Internally.
ZZZ = Mode
FPS = First Pulse Suppression
PPK = Pre Pulse Kill
R05 = RF Switched to Analog Control
A05 = Analog Control
M05 = Analog Control configured for AOM
FPS Trigger (pin 2) for Pulse Suppression
for Units Configured with FPS, PPK:
Standard
Inverted digital input option (NEG)
TTL Levels
Triggered on Rising Edge
Triggered on Falling Edge
Analog in (pin 6) for Power Control
for Units Configured with A05, R05:
0 to 5 volts Analog. Input Impedance 1.5kΩ
Enable - Stand by Mode (pin 11)
< 3 watt dissipation in stand by mode.
TTL High or no connection = Normal operation
TTL Low = Stand by Mode
Momentary TTL Low = Driver Reset - after fault is removed.
Zero Crossing Enable (pin 7)
Standard
Active zero cross option (ZC)
TTL high or no connection- disabled, TTL low- enabled
TTL high or no connection- enabled, TTL low- disabled
Sync out (pin 1)
Outputs 3.3 volt signal, inverted in ZC units.
RF Power Output:
YY watts where YY = 2 to 24 watts
Output Impedance:
50Ω
Supply Voltage:
+12, +15 VDC or +24 VDC (factory set)
Supply Current:
≤3 amps
OPERATING TEMPERATURE:
+10 to +55 0 C, non-condensing
Contact Cooled
The Driver must be attached to a heatsink capable of
dissipating 36W @ 12V, 45W @ 15V, or 72W @ 24V
MAXIMUM RATINGS:
Supply Voltage: +27 volts
Power Output:
No DC Feedback Allowed
Storage Temperature:
-20 to + 85 0 C
RF POWER (watts)
Frequency(MHz)
Supply Voltage (V)
24.00
27.12
40.68
68
80
110
12
10
10
10
10
10
10
15
24
24
24
20
20
10
24
24
24
24
24
24
10
CONNECTORS AND MECHANICAL:
RF Output Connector:
SMA Female
Power and Control Connector:
Mating Connector:
Molex 0430451221
Molex 0430251200 with 0430300008 crimp terminals
Pinout:
1 SYNC
2 FPS TRIGGER
3 MOD IN FIXED
4 GROUND
5 MOD IN VARIABLE
6 MOD IN ANALOG
7 ZERO CROSS ENABLE
8 LP - Low Power Fault output
9 HP – High Power Fault output
10 High VSWR – Load Fault output
11 ENABLE
12 + 12, + 15, or +24 VDC Factory Set.
ADJUSTMENTS:
RF Power Level Adjustment
Adjusts the output RF Power – clockwise increases power output.
LP – Low Power Set Point
Adjusts the minimum power threshold. The LP Fault output goes
LOW if the output power less than this level.
HP – High Power Set Point
Adjusts the maximum power threshold The HP Fault output goes
LOW if the output power is greater than this level.
High VSWR Set Point
Adjusts the module’s tolerance for a mismatched load connected to
RF Out.If a mismatch is detected, the HVSWR Fault output goes
LOW, the status LED will change to YELLOW, and the driver will
cease output until reset by momentarily entering stand by mode.
Pulse Width
Adjusts the length of time the driver outputs no RF energy after
receiving a Fixed Input trigger. 1μs to 20μs.
The following adjustments are used on units configured with FPS or PPK:
FPS Start
FPS Slope
FPS Window
Adjusts the initial power level of the first pulse .
Adjusts how quickly the RF pulses return to their normal level after
the FPS has been triggered. 20 μs to 300 μs.
Adjusts the duration of the suppression pulse cycle. 20 μs to 300 μs
STATUS INDICATOR:
Red Normal Operation Green Stand By Mode Yellow Fault Condition
Mechanical Dimensions:
Dimensions in inches and [mm]
商品属性 [操作频率] 24-110 MHz [最大射频功率] 2-24 W [兼容的声光设备] Modulator,Q Switch