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Jul 19
RF Amplifier
Including: Basic Deflector Alignment
D1384-aQ110-x
D1384-aQ120-x
D1384-aQ140-x
Instruction Manual
RFA0110-4 / RFA0120-4 / RFA0140-4 -x Series
Models -
RFA0110-4-20
RFA0120-4-15
RFA0140-4-12
Options -x:
ISOMET (UK) Ltd, 18 Llantarnam Park, Cwmbran, Torfaen, NP44 3AX, UK.
Tel: +44 1633-872721, Fax: +44 1633 874678, e-mail:
: 90 -130MHz, dual amplifier module, 20W per output
: 100-140MHz, dual amplifier module, 15W per output
: 110-160MHz, dual amplifier module, 12W per output
ISOMET CORP, 10342 Battleview Parkway, Manassas, VA 20109, USA.
Tel: (703) 321 8301, Fax: (703) 321 8546, e-mail:
www.ISOMET.com
ISOMET
isomet@isomet.com
isomet@isomet.co.uk
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Related Manuals for ISOMET RFA0110-4 Series
Summary of Contents for ISOMET RFA0110-4 Series
- Page 1 ISOMET CORP, 10342 Battleview Parkway, Manassas, VA 20109, USA. Tel: (703) 321 8301, Fax: (703) 321 8546, e-mail: isomet@isomet.com www.ISOMET.com ISOMET (UK) Ltd, 18 Llantarnam Park, Cwmbran, Torfaen, NP44 3AX, UK. Tel: +44 1633-872721, Fax: +44 1633 874678, e-mail: isomet@isomet.co.uk...
- Page 2 D1384-XY-aQ110 series. Each channel of these amplifiers requires a low level RF signal from a suitable frequency source such as the Isomet iMS4-L (or –P) frequency synthesizer. Figure 2 shows a functional block diagram of the driver.
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Page 3: Led Indicator
ISOMET LED INDICATOR The front panel tri-colour LED indicates the operating state. YELLOW The middle LED will illuminate YELLOW when 24Vdc supply is applied. Normal condition is ON GREEN The top LED will illuminate GREEN when Amplifier and AO thermal interlocks* are valid. -
Page 4: Installation And Adjustment
ISOMET INSTALLATION AND ADJUSTMENT Please refer to the Synthesizer manual for frequency, phase and amplitude control of the input signals. Connect cooling water at a flow of more than 1 litres/minute at < 20 deg.C to both the RF amplifier and AO device. Due to the RF power dissipated in the AO modulator, it is paramount that the device is operated only when water cooling is circulating. - Page 5 ISOMET Adjustment of the RF output power is best done with amplifier connected to the acousto-optic modulator. The optimum RF power level required for the modulator to produce maximum first order intensity will be different at various laser wavelengths. Applying RF power in excess of this optimum level will cause a decrease in first order intensity (a false indication of insufficient RF power ) and makes accurate Bragg alignment difficult.
- Page 6 ISOMET 3.11 To equalise deflection efficiency at the extremes of the scan, alternate between the minimum and maximum desired frequencies and adjust Bragg angle to give the same efficiency for both. The correct phase offset at each frequency must be applied. (Note: the photo detector or light power meter will require repositioning for the two angles.) Sweeping the freq’...
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Page 7: Maintenance
ISOMET MAINTENANCE Cleaning It is of utmost importance that the optical apertures of the deflector optical head be kept clean and free of contamination. When the device is not in use, the apertures may be protected by a covering of masking tape. - Page 8 ISOMET RFA 0110-4 Standard Version Connection Summary ‘D’ Type Control Connection Normal connection is to J5 of iMS4 Signal Type Pin out connection Digital Gate Input Signal pin 9 Internal pull up to 5Vdc Return pin 4 Closed or logic LOW (0.0v<V<0.8v)
- Page 9 ISOMET ISO M ET CTRL +24V RF DRIVER MODEL : S/N : RF Inputs SMA (4 off) 15way D-type Plug Mounting Holes (4 places) M5 Thread G 1/8" Thread Pipe fittings (2 off) Water cooled Heatsink RF Outputs DC Input...
- Page 10 ISOMET +Vdc Output Input +Vdc Transistor -GATE (D-type) Figure 2: Driver Block Diagram. Per Channel...
- Page 11 ISOMET XY Scan, -1, -1 orientation D1384-XY-aQ110 (aQ120) Top View GATE input signal APERTURE / BLOCK (J9) LASER INT. iMS4-P-T (X-axis) J1 J4 J3 J2 J1 J2 (Y-axis) RFA0110-4-20 (0120-4-15) Y-scan Host PC -1st 15wD Interlock X-scan, -1st CONTROL CABLE...
- Page 12 ISOMET Connection options Connection options for Beam Steered AO Deflectors Input Amplifier RF2 (DLY) Phase Controlled Output Input Amplifier RF2 (DLY) Phase Controlled Output Amplifier RF2 (DLY) Phase Controlled Output Input Amplifier RF2 (DLY) PhaseControlled Output Input Correct orientation as viewed from top of AOD...
- Page 13 ISOMET Schematic of a single electrode acousto optic deflector and tunable driver Intensity Modulation Tuning Voltage Deflector Driver Input Laser Beam θ BRAGG θ SCAN θ 1st Order Scan AO Deflector 0th Order The input Bragg angle, relative to a normal to the optical surface and in the plane of deflection is : θ...
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