RA-31
STEPPED ATTENUATOR (7 dB)
The RA-31 consists of three high-power attenuators that can be manually switched in or out. This allows the attenuation to be increased in 1-dB steps, up to a maximum of 7 dB. It is useful for stepping the output level of a gated amplifier for nonlinear measurements. The RA-31 is capable of handling pulse power in excess of 5 KW and an average power dissipation of 5 Watts. Attenuation characteristics are maintained up to about 50 MHz with an accuracy of approximately 5 percent.
RA-32
STEPPED ATTENUATOR (40 dB)
The RA-32 consists of three high-power attenuators that can be manually switched in or out. This allows the attenuation to be increased in 8-dB steps, up to a maximum of 40 dB. It is useful in reducing the output of a gated amplifier without distorting the shape of the RF burst. The RA-32 is capable of handling pulse power in excess of 5 KW and an average power dissipation of a few Watts. Attenuation characteristics are maintained up to about 50 MHz with an accuracy of approximately 5 percent.
.The RA-6 is a 6-dB, high-power attenuator capable of handling 1400 Volt peak-to-peak bursts at a duty cycle of 0.1%. This translates to a maximum average power level of 5 Watts.
RT-50
HIGH POWER 50 OHM TERMINATION
The RT-50 consists of a high-power, 50-Ohm termination mounted in a box with a heat sink. It is used to terminate the gated amplifier output and preserve pulse fidelity when a high-impedance load is used. The RT-50 can also be used to terminate the high-power attenuators. It is rated for 1400 V peak-to-peak (Vpp) at a 0.2 % duty cycle. This translates to a maximum average power of approximately 10 Watts.
TEM-128
TRANSMIT EMAT MATCHING NETWORK
The TEM-128 consists of eight high-voltage capacitors, which may be switched in parallel with the electromagnetic acoustic transducer (EMAT) coil. This raises the typically low inductive impedance of the EMAT to a point where it can be more efficiently driven by a gated amplifier. This type of matching can improve the performance of many EMATs, especially if the EMAT has a significant inductive reactance. In many cases, however, more sophisticated matching circuits may be needed. (See Application Notes.)
REMP-128
RECEIVE EMAT MATCHING NETWORK
The REMP-128 consists of eight capacitors, which may be switched in parallel with a receiving electromagnetic acoustic transducer (EMAT). Resonating the EMAT coil is usually quite effective in raising the impedance and reducing the bandwidth. The low-noise pre-amplifier also plays an important role in preserving the signal-to-noise ratio. Power is usually supplied by a RAM system.
RHP
HIGH POWER HIGH PASS FILTER
The RHP is a multi-element high-pass filter capable of handling the high power outputs of RITEC gated amplifiers. It has value in reducing the distortion of high- frequency bursts as well as improving the recovery time of the receiver by removing very low-frequency components. The RHP is normally built to satisfy individual customer requirements.
RLP
HIGH POWER LOW PASS FILTER
The RHP is a multi-element low-pass filter capable of handling the high power outputs of RITEC gated amplifiers. It has value in reducing the distortion of bursts by removing harmonics and noise. The RLP is normally built to satisfy individual customer requirements.
ADAC-5525
DATA ACQUISITION CARD FOR THE RAM-10,000
Note: The ADAC-5525 Digital I/O Card has been discontinued by the manufacturer and is no longer available.
The ADAC-5525 is a data acquisition card with a 50-pin flat ribbon computer cable. It requires a half-sized ISA slot in the computer. It performs digital I/O functions as well as analog-to-digital conversion.
ADAC-5632
DIGITAL I/O CARD FOR THE RAM-5000
Note: The ADAC-5632 Digital I/O Card has been discontinued by the manufacturer and is no longer available.
The ADAC-5632 is a digital I/O card with a shielded 37-pin cable. It requires a half sized ISA slot in the computer. It provides fast data transfer between the RAM and the computer. The analog-to-digital conversions are performed in the RAM.
