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GT7864 Multi-Channel Programmable Discrete Output (PDO) Board






GT7864 Multi-Channel
Programmable Discrete Output (PDO) Board


    High Density Discrete Output (32 or 64 D/A channels)

    Programmable Outputs

    Output Voltage Ranges from -10 V to +32 V

    High Reliability

    14-bit Resolution, 100 mA per Voltage Rail

Santa Ana, CA---Geotest/Marvin Test Systems

introduces the GTXI-based GT7864. The Programmable Multi-channel Discrete Output (PDO) board is used in applications such as: Automatic Test Equipment, Process Control Systems, PC-Based Instrumentation Systems and Avionics Testing.

The GT7864 is designed to provide multi-channel simulation of close-to-ground and close-to-28 VDC signals.  The GT7864 is offered in four configurations: A through D, providing 32 output channels (Versions A and B) or 64 output channels (Versions C and D). The GT7864 provides four voltage rails and each of the GT7864's discrete outputs can be pre-defined as to which rail will be used as Hi and which as Lo.  Each of the four voltage rail sources can be derived from an on-board DAC or from an External (EXT) input source.

In Versions A and C, the discrete outputs are jumper wired to pre-selected rails, while in Versions B and D, the discrete outputs are software programmable on the fly to any of the four rails.


The GT7864 is equipped with four DACs and four external inputs. Each of the eight signals can be switched to one of four voltage rails. Each of the 32 (or 64) channels can be connected to each of the rails using jumpers (Versions A and C) or relays (Versions B and D).

Version A provides 32 discrete output channels and uses jumpers to pre-configure which rail sources feed which channels. For each channel, there is a choice of Hi Rail and Lo Rail combinations.
Version B has 32 channels and uses relays to configure the reference sources.  The configuration is controlled by software for maximum flexibility.
Version C is identical to Version A, except it provides for 64 channels.
Version D is identical to Version B, except it provides 64 channels.

An on-board EEPROM saves system configuration status for query by software and for calibration.

For additional information contact:

Jacob Goldman

Geotest/Marvin Test Systems

2851 S. Pullman St.

Santa Ana, CA 92705

Tel: 949-263-2222

Fax: 949-263-1203




Marvin Test Solutions, Inc.
Phones: 1-888-837-8297, 949-263-2222   Fax: 949-263-1203
Jacob Goldman
(949) 263-2222

About Geotest - A subsidiary of the Marvin Group (Inglewood, CA) Geotest - Marvin Test Systems, Inc. is a global supplier of PXI and PC-based test products, systems, and solutions. Geotest's products and systems are used worldwide in thousands of aerospace, semiconductors, communications, medical, industrial, and military test applications.