• Large distance precision time distribution

The 1 GbE is intended for White Rabbit timing system. One SFP+ cage can be equipped with optical or electrical modules for 1GbE (not included).

• Electrical isolation for noise immunity.
• The digitizer can be placed close to the detector.
• Allows large physical separation between the digitizer and the host PC.

The 10 GbE interface offers similar advantages as the USB 3.0 interface and additionally, the data transfer capacity is higher (1 GByte/s sustained), the distance to the host can be much longer and there is electrical isolation from the host. The protocol used is UDP. A point-to-point connection to the host is required. Note that the SFP+ module is not included.

Means that the frontend of the digitizer will block DC components of signals, while allowing AC signals through.

Application Programming Interface for SP Devices digitizers - It is a set of functions exported to use the digitizers.

Maximize spectral purity over a large bandwidth.

SP Devices’ proprietary interleaving technology ADX is available in the firmware option –FWSDR. ADX dynamically suppresses interleaving artifacts to produce a pure spectrum.

The frequency range where the measured response is above a certain limit (for instance -3dB bandwidth describes the frequency range where the measured response is over -3dB).

This mode is for continuous recording of very long events.

The recording is starting at a trigger event and continue until it is terminated by the user. The continuous streaming mode produce a large amount of data and is often combined with a data reduction method in the FPGA. This could be, for example, channel masking, DDC and decimation (option –FWSDR), sample skip, or a custom algorithm implemented using the ADQ7 Development Kit or ADQ14 Development Kit.

See RF signal.

If the –GPIO option is not enough, a custom GPIO expansion card can be provided. See datasheet 15-1413 ADQ14 custom GPIO expansion for more details. The design of a custom GPIO expansion card is available through SP Devices’ design service. Please contact an SP Devices’ sales representative for more information.

See RF signal.

Enable accurate pulse detection.

SP Devices’ proprietary technology for baseline stabilization, DBS, tracks and compensates for baseline variations to suppress, for example, temperature drift in the detector. This enables accurate triggering even on small pulses and eliminates interleaving pattern noise, which can be particularly important when averaging many acquisitions. The precision of DBS is as high as 22 bits.

Means that the frontend of the digitizer will allow both DC and AC components of signals through.

Decimation is a two-step sample rate reduction method where the data is first filtered, then samples are discarded.  The filter operation reduces the bandwidth and increase the SNR. For high order decimation, the SNR is very high and the data word has to be increased from 16 bits to 32 bits so that the quantization noise does not limit SNR. The sample skip operation reduce the data rate by discarding samples. (Notice the difference to sample skip, where samples are discarded without filtering.)

A DDC combines a complex mixer with a decimation filter to select a specific RF band and reduce the data rate to suit the bandwidth of that RF band.

With the -USB option, the ADQ7 comes in a metal enclosure with mounting flanges. The data and control interface to the host PC is either via USB 3.0 or Ethernet. Two SFP/SFP+ ports are available and one is intended for 10 GbE while the other is intended for White Rabbit time synchronization over 1 GbE. SFP/SFP+ modules are not included. The device is powered by an external desktop power supply. The software driver automatically detects which data/control interfaces that are connected. It is not recommended to send commands and transfer data over more than one interface.