Signal amplifier, pulser&receiver

RAM-5000 for the study of nonlinear acoustic phenomenon (SNAP)

Features

• Characterize materials by measuring nonlinear properties
• Two gated amplifiers povided for a variety of nonlinear measurements such as beam mixing with the nonlinear generateion of sum and difference frequencies
• RF burst output power up to 5kW
• Superb analog signal processing
• Determination of both signal amplitude and phase for sensitive and accurate measurements of changes in ultrasonic velocity and attenuation
• Unique Design with three direct digtal synthesizers for complete flexiblity in measurements

Specifications

• RF burst output power up to 5kW
• Standard frequency range from 250kHz to 10MHz

Square wave pulser SP-801

Features 

• OUTPUT ADJUSTABLE FROM -50 TO -400 VOLTS
• PEAK CURRENT OUTPUT AS HIGH AS 100 AMPS
• DRIVES TRANSDUCERS FROM 400 kHz TO ABOVE 25 MHz
• ACCEPTS HIGH VOLTAGE TRIGGERS FROM STANDARD SPIKE GENERATORS

Specifications

• PULSE AMPLITUDE: -400 Volts down to -50 Volts in 2 dB steps
• FIXED TRANSDUCER FREQUENCIES: Pulse width optimized for 0.5, 1, 2.25, and 5 MHz
• ADJUSTABLE FREQUENCY OPERATION: Pulse width adjustable from less than 20 nsec to greater than 1.25 msec
• RISE TIME: Less than 6 nsec into 50 W
• FALL TIME: Less than 10 nsec into 50 W
• REPETITION RATE: 0.17 Hz to 10 kHz in 20 steps
• EXTERNAL TRIGGER SOURCE: Positive or negative pulse from TTL to high voltage spike Average power less than 2 Watts
• INPUT POWER: 95 to 120 V, or 210 to 250 V at 50 to 60 Hz; 30 Watts

Broadband receiver BR-640

Features

• 64 DB GAIN
• 79 DB GAIN CONTROL
• WIDE FREQUENCY RANGE
• ADJUSTABLE FREQUENCY RESPONSE
• OVERLOAD PROTECTION AND FAST RECOVERY

Specifications

• BANDWIDTH: (at 3 dB points): 100 kHz to 50 MHz (typically 70 MHz)
• GAIN RANGE: -15 dB to + 64 dB in 1 dB steps
• NOISE FIGURE: 6 dB
• INPUT IMPEDANCE: 50W  or 10 k W paralleled by 25 pF (switch selectable)
• OUTPUT LEVEL: 1 Volt Peak to Peak into a 50  load
• HIGH PASS FILTER: 100 kHz, 500 kHz, or 1 MHz (switch selectable)
• LOW PASS FILTER: 3 or 1 2 MHz (switch selectable)
• AUXILIARY POWER OUTPUT: +15 & +5 Volts, regulated
• INPUT POWER: 100, 120, 220, or 240 V at 50 to 60 Hz; 30 Watts

Gated amplifier RAM-10000

Features

• Versatile Computer Controlled Ultrasonic System
• RF Burst Outputs up to 2.5 kW
• Frequency Ranges from 50 kHz to 45 MHz
• Signal Processing Allows Accurate Determination of both Signal Amplitude and Phase.
• Software Provided for both Acoustic Transit Time and Attenuation Measurements.

Specifications

• Frequency Range : 250 kHz to 17.5 MHz
• RF Pulse Power (RMS): 1.5 KW to 10 MHz, 1 KW to 17.5 MHz
• Burst Width (cycles): 1-255, 1 cycle steps
• Maximum Duty Cycle: 1%
• Maximum Burst Width: 200 msec
• Receiver Frequency Range: 150 kHz to 20 MHz
• Receiver Gain (to output of phase sensitive detectors): 100 dB
• Receiver gain ( to Gated RF Signal Out): Approximately 80 dB
• Max. Level of Gated RF Signal Out: 2 Volts peak-to-peak into 50
• RF Gate Position (delay): 6,553.6 sec in 0.1 sec steps
• RF Gate Width: 409.6 sec in 0.1 sec steps
• RF Gain Control Range: 78 dB
• RF Gain Step Size: 2 dB
• RF Gain (to monitor): 60 dB typical
• RF High Pass Filters: 0.1, 0.5, & 2 MHz
• RF Low Pass Filters: 5, 10, & 20MHz
• Receiver Intermediate Frequency: 25 MHz
• IF Amplifier Bandwidth: 0.4, 1, & 4 MHz
• Video Low Pass Filters: 80 kHz to 2 MHz in 8 steps
• Integration Rate Constants: 2.7 to 1600 V/Vsec in 8 steps
• Integrator Gate Position (delay): 6,553.6 sec in 0.1 sec steps
• Integrator Gate Width: 409.6 sec in 0.1 sec steps
• Trigger Source: Internal, External, or Computer
• Maximum Trigger Rate: Greater than 10 kHz
• Internal Repetition Rate: 0.17 Hz to 10 kHz
• Trigger Output: Positive TTL output coherent with operating frequency
• AC Power Requirements: 100, 120, 220, or 240 Volts RMS, 50-60 Hz, 300 Watts

Gated amplifier GA-10000

Features

The GA-1000 is a limited duty cycle amplifier producing high power RF tone bursts derived from an external continuous wave (CW) source (~1 Volt peak-to-peak). Front panel manual controls include repetition rate, burst cycle count, and output power. Three versions of the instrument are available with different maximum output levels: 5 KW, 1.5 KW, and 400 W rms power into 50 Ohms during the burst. The frequency span of each amplifier is tailored to meet the users needs within the range of 40 kHz to 20 MHz.

Specifications