Hytec Electronics Ltd

Analogue Input Transition Board

VTB8209

VME64 extensions / Transition Board
Full EMC shielding and insertion/extraction handles
RP0 and RP2 connections
Handles 64 analogue input signals, four external trigger and clock inputs, 8 DAC current outputs.
Four DC-DC converter sites allow isolated analogue output circuits to be powered externally
Four 50-way SCSI-2 sockets provide ease of connection to four groups of circuitry each with 16 inputs, input trigger/clock and IDAC outputs.

Product Description

The VTB 8209 is a 6U (double height) VME rear I/O transition board, which provides connection to four IP-MUXADC-8403 Industry Packs mounted on an 8002 Carrier Board. It routes the signals from the four 50-way SCSI sockets to the Carrier Board via the J0 and J2 connectors of the VME backplane. The board includes differential amplifiers associated with each input. Optional on-board 5V to 12V DC-DC converters are connected to pins on the RP0/RP2 connectors to facilitate powering the isolated analogue circuits of the amplifiers and 8403 boards.

Construction

The unit is constructed to the VME64x standard, with EMC rear panel, injector/ejector handles, guide pin and slot keying, static discharge protection, hot swap capability, 5-row RP0 and RP2 connectors.

Signal Path

A rear-mounted transition card with four high-density 50-way [SCSI2] connectors transmits/receives all I/O signals for each of four MADC8403 boards. The signals connect to the main carrier board according to the VME64x Greenspring pinout for IP module carriers.

SCSI Connectors

Connector 1 (lowest connector) Inputs 1-16, Trig1(+/-), Clk1(+/-), IDAC1,2
Connector 2                               Inputs 17-32, Trig2(+/-), Clk2(+/-),IDAC1,2
Connector 3                               Inputs 33-48,Trig3 (+/-), Clk3(+/-), IDAC1,2
Connector 4 (top connector)        Inputs 49-64,Trig4 (+/-), Clk4(+/-), IDAC1,2

8209 Analogue Specifications

Parameter	Specification	Comment
Analogue Input	+/-10V span	Outputs 0V to +5V
Analogue Outputs	0V to +5V	ACMN=+2.5V
Gain	Adjustable by 5-turn trim-pot each channel	Trim +/-2mV
Offset	Adjustable by 5-turn trim-pot each channel	Trim +/-2mV
Gain drift	10ppm/oC
Offset drift	10ppm/oC
Gain stability	1ppm/year
Offset stability	1ppm/year
Input impedance	800Kohms differential	200Kohms common mode
CMV	+/-10V
CMRR	80dB @ 50/60Hz
Response	-12dB 0Hz - 500Hz	For use below 500 Hz only

Analogue Input Connection Details

Signal	Description	SCSI Connection
Signal High 1-16	Analogue signal input +ve	Skt1/26-41
Signal Low 1-16	Analogue signal input -ve	Skt1/1-16
/CALEX1	Calibrate command (switch to AGnd)	Skt1/42
XTrig1 High/Low	Opto-isolator input circuit of 8403	Skt1/43 Skt1/18
XClk1 High/Low	Opto-isolator input circuit of 8403	Skt1/45 Skt1/20
IDAC 0,1	DAC current outputs from 8403	Skt1/44 Skt1/50
+5VA	Isolated +5V from 8403	Skt1/17,19
+12VX	Isolated voltage DC-DC Converter 1	Skt1/46,47
-12VX	Isolated voltage DC-DC Converter 1	Skt1/48,49
AGnd	Isolated Ground	Skt1/21,22,23,24,25

Signal High 17-32	Analogue signal input +ve	Skt2/26-41
Signal Low 17-32	Analogue signal input -ve	Skt2/1-16
/CALEX2	Calibrate command (switch to AGnd)	Skt2/42
XTrig2 High/Low	Opto-isolator input circuit of 8403	Skt2/43 Skt2/18
XClk2 High/Low	Opto-isolator input circuit of 8403	Skt2/45 Skt2/20
IDAC2,3	DAC current outputs from 8403	Skt2/44 Skt2/50
+5VA	Isolated +5V from 8403	Skt2/17,19
+12VX	Isolated voltage DC-DC Converter 2	Skt2/46,47
-12VX	Isolated voltage DC-DC Converter 2	Skt2/48,49
AGnd	Isolated Ground	Skt2/21,22,23,24,25

Signal High 33-48	Analogue signal input +ve	Skt3/26-41
Signal Low 33-48	Analogue signal input -ve	Skt3/1-16
/CALEX3	Calibrate command (switch to AGnd)	Skt3/42
XTrig3 High/Low	Opto-isolator input circuit of 8403	Skt3/43 Skt3/18
XClk3 High/Low	Opto-isolator input circuit of 8403	Skt3/45 Skt3/20
IDAC4,5	DAC current outputs from 8403	Skt3/44 Skt3/50
+5VA	Isolated +5V from 8403	Skt3/17,19
+12VX	Isolated voltage DC-DC Converter 3	Skt3/46,47
-12VX	Isolated voltage DC-DC Converter 3	Skt3/48,49
AGnd	Isolated Ground	Skt3/21,22,23,24,25

Signal High 49-64	Analogue signal input +ve	Skt4/26-41
Signal Low 49-64	Analogue signal input -ve	Skt4/1-16
/CALEX4	Calibrate command (switch to AGnd)	Skt4/42
XTrig4 High/Low	Opto-isolator input circuit of 8403	Skt4/43 Skt4/18
XClk4 High/Low	Opto-isolator input circuit of 8403	Skt4/45 Skt4/20
IDAC6,7	DAC current outputs from 8403	Skt4/44 Skt4/50
+5VA	Isolated +5V from 8403	Skt4/17,19
+12VX	Isolated voltage DC-DC Converter 4	Skt4/46,47
-12VX	Isolated voltage DC-DC Converter 4	Skt4/48,49
AGnd	Isolated Ground	Skt4/21,22,23,24,25

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