BRUKER. FTLP/4M Manual. Version 1.0 BRUKER - SPECTROSPIN AG
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1 BRUKER FTLP/4M Manual Version 1.0 BRUKER - SPECTROSPIN AG
2 The information in this manual may be altered without notice. Spectrospin AG accepts no responsibility for actions taken as a result of use of this manual. Spectrospin AG accepts no liability for any mistakes contained in the manual, leading to coincidental damage, whether during installation or operation of the instrument. Unauthorised reproduction of manual contents, without written permission from the publishers, or translation into another language, either in full or in part, is forbidden. This Manual was written by Roland Eggli Desktop Published by Beat Hugelshofer and Roland Eggli Spectrospin AG, CH-8117 Fällanden August 1993: Spectrospin AG Fällanden, Switzerland P/N:Z31218 DWG-Nr.:886001
3 Contents 1 Introduction General System overview FTLP/4M Description... 5 Board overview... 5 Channel Board Interface... 7 ADDRESS... 7 DATA Troubleshooting Technical Data List of Index List of Figures List of Tables FTLP/4M Manual Spectrospin AG i
4 Contents ii Spectrospin AG FTLP/4M Manual
5 Introduction 1 General 1.1 This document describes the board FTLP/4M. It includes the description of the hard- and software interface. In special there is a section giving hints on troubleshooting. Finally the complete technical data shows the performance of this board. System overview 1.2 For measurements in digital systems, analog to digital converters are used. So the analogbandwith must be reduced with a lowpassfilter. Antialiasing-Filter is the technical name given to this type of filter. Figure 1: digital measurement system FILTER A D The FTLP-board is an antialiasing-filter, which is designed for the fast AD-converter system FADC. You will find more details about the system configuration, in the RCU-manual (P/N: Z31209). FTLP/4M Manual Spectrospin AG 3
6 Introduction 4 Spectrospin AG FTLP/4M Manual
7 FTLP/4M 2 Description 2.1 The boardname FTLP/4M is a mnemonics word for FILTER LOWPASS / 4MHZ - BOARD. Board overview Figure 2: block diagram CH_A IN CH_B IN Channel A Channel B CH_A HR_OUT CH_A BB_OUT CH_B HR_OUT CH_B BB_OUT I 2 C-BUS I 2 C-Modul USERBUS- CONNECTOR POWER-Modul POWER POWER-ADC The FTLP/4M is a two channel lowpass filtersystem with variable 3dB-frequencies. The filtermoduls of FTLP/4M are designed as dedicated 4 pole Butterworth type. The selection of a particular filterpath is realised with a I 2 C bus system. The supply voltage for the filter electronic is generated on the board. Each voltage is controlled and its status is displayed on the front panel with a common green LED POWER. On the front panel connector POWER-ADC is the standard AQR power supply (+/-19V and +/-9V). With this connector the FTLP supplies the analog part of the FADC. FTLP/4M Manual Spectrospin AG 5
8 FTLP/4M Channel Figure 3: filterchannel 50 Ω DIFF FA BB 50 Ω 4MHz 2MHz 1MHz 500kHz 250kHz I 2 C-BUS 125kHz HR 1 ΜΩ One filterchannel includes four blocks: Inputamplifier (DIFF): Filterarray (FA): BB-Outputamplifier (BB): HR-Outputamplifier (HR): The differential inputamplifier is designed especially for a high common mode rejection. Six filtermoduls with different 3dB-frequencies and a bypass-path are selectable by the I 2 C bus. For filter bandwiths lower than 4MHz, there are two filtermoduls connected in series. About that, the system has filterpaths with 8 poles, but the selected lower filter is dominating. The broad band path with a special high bandwith has two different gains. These are selectable by the I 2 C bus. The high resolution path is additionally included for future use. 6 Spectrospin AG FTLP/4M Manual
9 Board Interface Board Interface 2.2 Standard I 2 C-BUS components are implemented on the FTLP/4M board. To use this board, the I 2 C-system must conform to the I 2 C specification defined by Philips. Refer to I 2 C specification for further details. The board function is controlled with the I/O expander PCF8574T. Figure 4: complete data transfer S A2 A1 A0 0 A P7 P6 P5 P4 P3 P2 P1 P0 A P START ADDRESS R/W ACK DATA ACK STOP ADDRESS On the FTLP/4M board the I/O expander I 2 C address pins are routed to the backplane connector and are fixed with pullup resistors, so the backplane defines the I 2 C address, when the board is plugged in, alternatively the lower address pins are always high. The actual I 2 C-address is defined by the slot of the AQR-system. Table 1. I 2 C-Address Function Address in AQR- SLOT FLT Address-range IC-type Port identification AC HEX A0-AF HEX X24022 Port controlling 4C HEX 40-4F HEX PCF8574 FTLP/4M Manual Spectrospin AG 7
10 FTLP/4M DATA Table 2. Board Function P7 MSB P2 P1 P0 LSB Channel A&B Bypass 3dBfrequencies BB-Gain X H H H OFF (OV) OFF X L L L ON ON --- X X L L H ON OFF 125 khz X X L H L ON OFF 250 khz X X L H H ON OFF 500 khz X X H L L ON OFF 1 MHz X X H L H ON OFF 2 MHz X X H H L ON OFF 4 MHz X L X X X X X X 1 H X X X X X X 5 8 Spectrospin AG FTLP/4M Manual
11 Troubleshooting Troubleshooting 2.3 Figure 5: flow diagram for troubleshooting start POWER LED is lighting no yes yes all filterpaths are working correctly yes filterpathselection is working AQR - Power is ok. no no yes no one channel is working correctly no yes exchange the inputsignal CH_A_IN with CH_B_IN the other channel is working correctly no exchange the FTLP/4M board yes the FTLP/4M -board is working correctly. Check the inputsystem end FTLP/4M Manual Spectrospin AG 9
12 FTLP/4M Technical Data 2.4 Table 3. Filterboard Number of Filterchannel 2 Number of different 3dB-frequencies 6 Bypass yes Table 4. Filterchannel Modul 3dB-frequency settling time 1 Filter khz 20 µs Filter khz 10 µs Filter khz 5 µs Filter 4 1 MHz 2.5 µs Filter 5 2 MHz 1.5 µs Filter 6 4 MHz 0.8 µs Bypass µs Note 1: time from the input transition until the outputsignal arrived 90% of the final value. 10 Spectrospin AG FTLP/4M Manual
13 Technical Data Table 5. Inputamplifier PARAMETER CONDITIONS TYP UNITS Input Voltage Range 1 Vpp Full Power Bandwith 10 MHz Input Resistance 50 Ω Table 6. BB-Outputamplifier PARAMETER CONDITIONS TYP UNITS DC Gain P7=0 1 DC Gain P7=1 5 Output Voltage Swing Vin=1Vpp 1 Vpp Gain=1 Output Voltage Swing Vin=1Vpp 5 Vpp Gain=5 Full Power Bandwith 10 MHz Output Resistance 50 Ω Output Offset Voltage Gain=1 +/- 10 mv Output Offset Voltage Gain=5 +/- 50 mv Output Noise Gain=1 300 µvrms Output Noise Gain=5 1 mvrms Table 7. HR-Outputamplifier PARAMETERS CONDITIONS TYP UNITS DC Gain 10 Output Voltage Swing Vin=1Vpp 10 Vpp Full Power Bandwith 2 MHz Output Resistance 35 Ω Maximum Output Current 50 ma Output Offset Voltage +/-150 mv Output Noise 2 mvrms FTLP/4M Manual Spectrospin AG 11
14 FTLP/4M Table 8. Power Supply Requirements PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Voltage 19V V Supply Voltage -19V V Supply Voltage 9V V Supply Current 19V V=19V A Supply Current -19V V=-19V A Supply Current 9V V=9V A Table 9. Mechanical HF-CONNECTOR POWER ADC -CONNECTOR USERBUS-CONNECTOR Board dimensions ST KOAX SMA BU W PRT L=29,5mm 85SMA50-0-X2857 Nr ST BU 9W PRT MINI-D KPL. DE-9S-1A8N-A197 Nr ST SFT 48 W PRT DIN C/ Nr Standard HF-KASSETTE 6HE / Double Extended(220mm) / 7TE 12 Spectrospin AG FTLP/4M Manual
15 List of Index A B F H I M P T antialiasing...3 BB-Outputamplifier...6, 11 Bypass...6 Filterarray...6 Filterchannel...10 FTLP/4M...5 HR-Outputamplifier...6, 11 I2C-Address...7 I2C-BUS...7 Inputamplifier...6, 11 Mechanical...12 POWER...5 Power Supply...12 POWER-ADC...5 troubleshooting...9 FTLP/4M Manual Spectrospin AG 13
16 List of Index 14 Spectrospin AG FTLP/4M Manual
17 List of Figures 1.Introduction 3 Figure 1: digital measurement system FTLP/4M 5 Figure 2: block diagram... 5 Figure 3: filterchannel... 6 Figure 4: complete data transfer... 7 Figure 5: flow diagram for troubleshooting... 9 FTLP/4M Manual Spectrospin AG 15
18 List of Figures 16 Spectrospin AG FTLP/4M Manual
19 List of Tables 1.Introduction FTLP/4M... 5 Table 1. I2C-Address... 7 Table 2. Board Function... 8 Table 3. Filterboard...10 Table 4. Filterchannel...10 Table 5. Inputamplifier...11 Table 6. BB-Outputamplifier...11 Table 7. HR-Outputamplifier...11 Table 8. Power Supply Requirements...12 Table 9. Mechanical...12 FTLP/4M Manual Spectrospin AG 17
20 List of Tables 18 Spectrospin AG FTLP/4M Manual
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Ultra Low-Noise Variable Gain Low-Frequency Voltage Amplifier
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Obsolete Product(s) - Obsolete Product(s)
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