Teledyne SP Devices ADQ14, Руководство пользователя

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Classification Revision
Public PA1
Document ID Print date
18-2074 2018-04-06
2.1 Specification
The specification for the pulse detection firmware is presented in Table 2 . For the general specification
of the ADQ14 digitizer, please refer to the ADQ14 data sheet [ 2 ].
Table 2: Specification for ADQ14-FWPD.
Item Min Max Unit
General
Pulse width 1 - Sample
Pulse separation 1 - Sample
Record length (500 MSPS, 1 GSPS) 4 2
32
- 1 Sample
Record length (2 GSPS) 8 2
32
- 1 Sample
Pulse characterization
Pulse width
1
1 2
16
- 1 Sample
Pulse peak timestamp
2
- 2
32
- 1 Sample
Average pulse rate (1 GSPS) - 250 10
6
Pulses / s
Average pulse rate (2 GSPS) - 500 10
6
Pulses / s
Average pulse rate for histograms - 33 10
6
Pulses / s
Histogram bin value - 1 048 575 -
1
See Section 4.8.1
2
See Section 4.8.3
2.2 Overview
Fig. 1 presents a block diagram outlining the main features of the data path. The diagram is drawn for a
four-channel device but applies to one- and two-channel devices as well.
• Input range
ADQ14 digitizers with the –VG option offer the possibility to tune the input range of the digitizer.
• DC offset
The analog signal may be subjected to a DC offset. If only pulses with a certain polarity is expected,
the user may wish to offset the analog signal to place the baseline close to the maximum or minimum
ADC code. This allows pulses with amplitudes that would normally saturate the ADC to be safely
collected, thus increasing the dynamic range of the digitizer.
• ADC
The analog signal is sampled at 500 MSPS (–A devices), at 1 GSPS (–C devices) or at 2 GSPS
(–X devices).
ADQ14-FWPD – User Guide www.teledyne-spdevices.com Page 4 of 28