AVANCE TwoBay General Description

AQX

The acquisition control system AQX generates all digital control signals as specified by the user’s pulse program. The CCU runs as a "diskless UNIX" client and controls TCU, FCU’s, RCU and GCU. The TCU controls all timings and pulses. The FCU’s generate RF phases, frequencies, and control the RF amplitudes and modulation. Amplified, demodulated and digitized NMR signals are fed to the RCU which performs real time digital filtering. The optional GCU generates the gradient shapes for GRASP experiments.

AQR

The acquisition rack AQR contains all the RF/AF components for signal routing, transmitting and receiving purposes. The NMR signal is mixed down from RF frequency by the RX22 to audio frequency and then digitized by the ADC. The local oscillator frequency is derived from the LOT module. The RF frequencies are shaped by the ASU’s, and routed to the appropriate RF transmitters. The RF transmitters are controlled by the ACB module. Routing and output power information is displayed on the BSMS keyboard.

RF Transmitter

The linear RF transmitters generate both pulsed and CW frequencies for each channel with appropriate amplitudes.

HPPR preamplifier module

The HPPR amplifies, filters and routes the NMR response signals from the probe to the RX22 receiver. It switches the RF transmitter output to the probe.

Magnet

General handling and maintenance information for all magnets can be found here. Specific documents are supplied with each magnet.

Sample Changer (optional)

Bruker Automated Sample Changer's (BACS) allow the user to easily and effectively perform automatic experiments.