Summary of Contents for FAST ComTec 7072T
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Page 1: User Manual
7072T Dual Timing 500ns ADC User Manual copyright FAST ComTec GmbH Grünwalder Weg 28a, D-82041 Oberhaching Germany Version 2.3, May 11, 2009... -
Page 2: Copyright Information
D-82041 Oberhaching, Germany. All rights reserved. This manual contains proprietary information; no part of it may be reproduced by any means without prior written permission of FAST ComTec, Grünwalder Weg 28a, D-82041 Oberhaching, Germany. Tel: ++49 89 66518050, FAX: ++49 89 66518040. -
Page 3: Table Of Contents
Table of Contents Table of Contents 1. Introduction ..........................1-1 2. Hardware Description ......................2-1 2.1. Overview ........................2-1 2.2. Front panel ........................2-1 2.2.1. Inputs......................2-2 2.2.2. MONITOR outputs..................2-3 2.2.3. Controls ......................2-4 2.2.4. Indicators......................2-4 2.3. Rear panel........................2-5 2.3.1. - Page 4 Table of Figures Table of Figures Figure 2.1: Front panel........................2-1 Figure 2.2: Gate/Start input schematic ..................2-2 Figure 2.3: FAST-NIM input schematic..................2-3 Figure 2.4: MONITOR output signals.................... 2-3 Figure 2.5: Rear panel ........................2-5 Figure 2.6: ADC port connectors ....................2-5 Figure 4.1: General ADC Signal Timing..................
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Page 5: Introduction
Introduction Introduction The Model 7072T is an unique dual channel device that can operate either as an ultra fast pulse height analyzing analog-to-digital converter (PHA ADC) with a fixed conversion time of 500 ns, a time-to-digital converter (TDC) or a sampling voltage analyzer (SVA ADC). The 7072T is ideally suited for high counting rate applications in Energy and Time Spectroscopy. -
Page 6: Hardware Description
Hardware Description 2.1. Overview The Model 7072T is a single width NIM module. It has two fully equal and independent channels. Both channels are controlled using the front panel buttons and switches. No jumper or switch inside is necessary. 2.2. -
Page 7: Inputs
Hardware Description 2.2.1. Inputs Signal inputs: Two BNC connectors accept +25 mV to +10 V (standard / +8 V optional) positive unipolar (positive lobe leading) pulses or a varying voltage level when used in SVA mode. Input impedance = 1 kΩ, optimized for gaussian shaped pulses with shaping times ranging from 250 ns to 25 µs, dc coupled. -
Page 8: Monitor Outputs
Hardware Description Stop inputs: Two BNC connectors accept FAST NIM pulses (Stop signals) (input impedance = 50 Ω) in TDC mode. Is not used in PHA/SVA mode. All FAST-NIM inputs have ECL differential receivers and input diodes as it is shown in Figure 2.3. The diodes are used to prevent the inputs from positive and large negative pulses. -
Page 9: Controls
Hardware Description SCA: TTL outputs in PHA mode (TTL pulses of approx. 0.5 µs duration. One output pulse for each input signal that falls between the ULD and LLD thresholds. Outputs the analog TAC signals in TDC mode. The amplitude of the output signal is proportional to the time. -
Page 10: Rear Panel
Hardware Description 2.3. Rear panel Figure 2.5: Rear panel Data: 13 bit binary data lines and data transfer command lines, 25-pin female D-Sub connector on the rear panel. 2.3.1. ADC port connectors Figure 2.6: ADC port connectors ComTec GmbH... -
Page 11: Functional Description
8191 if it is below the normal range (firmware version V84 starting Feb 2007). The firmware version and date can be found on a label at the backside of the 7072T board. ComTec GmbH... -
Page 12: Time-To-Digital Conversion
Functional Description 3.2.3. Time-to-Digital Conversion In this mode both channels measure the time interval between the falling edges of GATE / START and STOP signals. This time interval is converted to a digital value in the time range as been set with the yellow Up/Down buttons. The conversion range can be changed by temporarily switching into PHA or SVA mode. -
Page 13: Adjust Uld
100 ns - 200 ns - 500 ns - 1 us - 2 us - 5 us - 10 us - 20 us - 50 ns - etc. 3.3.7. Factory reset To reset all device parameters to the default values as the 7072T was shipped from the factory press both DOWN BUTTONS simultanously during power-up. ComTec GmbH... -
Page 14: Appendix
Appendix - Specification Appendix 4.1. Specification 4.1.1. Absolute maximum ratings Input voltage: any analog signal input: ..........-0.8 / +12 V any TTL GATE input: ............ -0.5 / +5.5 V any FAST-NIM input: ............-3 / +1 V DC input current: any analog signal input: .......... -
Page 15: Connectors
Appendix - Specification 4.1.4. Connectors SIGNAL Input Input impedance: dc coupled ................. 1 kΩ Connector type: ....................BNC GATE / START Input PHA/SVA mode: Input impedance: COINCidence mode ..........4.7 kΩ to +5 V ANTIcoincidence mode ..........4.7 kΩ to GND Input HIGH voltage: .................. -
Page 16: Level Adjustment Ranges
Appendix - Performance characteristics LLD: ....................+25 mV ULD: ....................+9.95 V Coinc/Anti-coincidence: ..................Coincidence 4.1.6. Level adjustment ranges TDC threshold: ..........-1.0 V … -100 mV, in 1.22 mV steps ADC threshold: ..........-100 mV … +1.0 V, in 1.22 mV steps (ADC th <... -
Page 17: Performance Characteristics
+ 500 ns fixed conversion time + data transfer time of 100 ns to buffer (there could be an additional dead time if the MCA can not accept the data rates generated by the 7072T - this depends on the MCA used) ............. -
Page 18: Tdc
Appendix - Performance characteristics 2,0% 1,5% 1,0% 0,5% 0,0% -0,5% -1,0% -1,5% -2,0% Channel Figure 4.3: ADC, typical differential linearity plot 4.2.2. Time range: ............... 50 ns, 100 ns, 200 ns, ................500 ns, 1 µs, 2 µs, ................5 µs, 10 µs, 20 µs Usable times: (start delay) ............ -
Page 19: Figure 4.4: Tdc, Typical Noise Spectrum (50Ns Range)
Appendix - Performance characteristics TDC, 50ns Range 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 Channel Figure 4.4: TDC, typical noise spectrum (50ns range) TDC, 50ns Range 1,0% 0,5% 0,0% -0,5% -1,0% Channel Figure 4.5: TDC, typical differential linearity plot (50ns range) ComTec GmbH Appendix 4-6... -
Page 20: Physical
Appendix - Physical 4.3. Physical Physical size: single width NIM module (1.35 x 8.71 inches; 3.43 x 22.13 cm) as per TID - 20893 (rev.) Shipping weight: ................1.8 kg (net 1.0 kg) ComTec GmbH Appendix 4-7...
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