2
ISOMET
1.
GENERAL
The RFA0110 / 0120 / 0140 -2-x series power amplifiers, figure 1, contains two independent fixed
gain broadband RF amplifiers specifically designed to operate with the Isomet iMS4 synthesizer
driving acousto-optic devices such as the D1340-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.
The rise and fall response time for the amplifier is approx’ 25nsec.
This amplifier is designed to operate at full rated power into a 50
Ω
load with 100% duty cycle.
Trace 1 = RF output
Trace 2 = Sync signal
Water cooling is mandatory. The heatsink temperature must not exceed 70
°
C.
SERIOUS DAMAGE TO THE AMPLIFIER MAY RESULT IF THE TEMPERATURE EXCEEDS 70
°
C.
SERIOUS DAMAGE TO THE AMPLIFIER MAY ALSO RESULT IF THE RF OUTPUT CONNECTOR
IS OPERATED OPEN-CIRCUITED OR SHORT-CIRCUITED.
A low impedance d-c power supply is required. The operating voltage is +24V or +28Vdc at a current
drain of approximately 6A (model dependent- see specific data sheet). The external power source
should be regulated to
±
2% and the power supply ripple voltage should be less than 200mV for best
results.
Higher RF output power is achieved at 28Vdc.
