GE VMIVME-4105 Digital-to-Analog Converter Board

GE VMIVME-4105 Digital-to-Analog Converter Board

Analog Output Testing: 

Any one of the eight analog  outputs may be switched to the analog output test bus  (Test Bus 2). This bus is routed through the P2 AMXbus  analog backplane to an Analog-to-Digital Converter  (ADC) board which is used to verify each DAC channel  on the VMIVME-4105 board.

Compatibility: 

The VMIVME-4105 Analog Output  Board is a standard, double height, printed circuit board  which is compatible with the VMEbus specification.

Board Address: 

The physical address for the board  may be selected through a 12-bit DIP switch. VMEbus  address lines A04 through A15 are decoded for board  selection.

Test Mode: 

The DAC board may be used in  conjunction with other VMIC boards and the VMIC  AMXbus™ backplane for extensive fault detection and  isolation. There are two dedicated analog buses that are  used by the DAC board.

Tests may be performed by utilizing any one of the eight  DAC outputs. While in a test mode the eight DAC  outputs may be isolated from the P3 connector so that  user-connected devices are not affected by worst-case  testing in an off-line mode. Real-time fault detection and  isolation is not supported if the multiplying DAC option  is used. Built-in-Test is not supported if P2 outputs are  used.

Analog Input Test Mode: 

Any one of the eight analog  outputs may be switched to an analog test bus  (Test Bus 1). This analog bus may be used to verify the  operation of a VMIC Multiplexer Expansion Board  (VMIVME-3200A) that is designed to support  Built-in-Test. The interconnecting of the analog bus  between boards may be accomplished by using one of  VMIC’s 5-, 9-, or 19-slot AMXbus backplanes.

Data Transfer: 

When a board write operation is  executed, the destination of the data is controlled by data  bit 15. If data bit 15 is a one, the word is written to the  Control Register. When data bit 15 is a zero, the data is  written to the Digital-to-Analog Converter (DAC) that is  addressed. Executing a read access to any valid board  address will allow the user to read the board status.  Digital data to the DAC is contained in data bits D00  through D11. Unipolar binary code is used for unipolar  operation (0 to -10 V output). Bipolar operation (-10 to  +10 V output) may use either offset binary or two’s  complement code.

Mode Selection: 

The operation modes of the board  may be selected by writing to the Control Register. Only  data bits D08 through D14 are utilized for the Control  Register. Data bits D08 through D14 contain information  to select the different DAC operation modes.

SPECIFICATION

Temperature:0 to +55 °C, operating -20 to +85 °C, storage

Humidity: 20 to 80 percent relative, noncondensing

Altitude: Operation to 10,000 ft

Cooling: Forced air convection

Dimensions: Double Eurocard (6U) 160 x 233.35 mm

FEATURES

• 8-channel analog output (D/A per channel) 

• Jumper-selectable P2 or front panel outputs 

• 12-bit resolution 

• 2- or 4-quadrant multiplier jumper-selectable option 

• Jumper option to support eight independent or one shared AC or DC voltage  reference 

• ±10 V or 0 to -10 V jumper-selectable options 

• Double Eurocard format with front panel fail LED  

• Requires VMIVME-31xx for Built-in-Test 

• Multiplexed programmable outputs for testing analog outputs 

• Internal DC reference to support Built-in-Test