Covenant Ultratech Inc.

Analyst ems | Analyst ils | Analyst ft | Analyst ems + ft | Analyst fcs

Functional Test Capabilities

In-Circuit Test Capabilities

System Configuration

Analyst ems+ft
High fault coverage in-circuit tester

Functional Test Capabilities
The CheckSum FUNC-2 board is at the heart of the Analyst ems+ft system and provides the capabilities used for a wide range of functional testing requirements:

A DMM for measurement of AC and DC voltages and low resistances
A counter/timer for measuring oscillator frequencies or event times
A function generator for sourcing DC, sine or square waves
Digital I/O bits for logic sourcing, sensing and controlling external hardware, or direct control of external relays.
Relay multiplexer points that can be used for measurement of voltages greater than plus or minus 12V or with the necessity for low path resistance
Relay-switch closures for supplying power to the UUT or controlling relays on the assembly being tested
Relay-switched, fused DC power from the PC for powering UUTs requiring low power, or for external interfaces
16 back-panel test points for signal switching (extendable in 50-point increments).

For unique or more sophisticated functional testing needs, the System can control GPIB instrumentation via an IEEE-488 controller.

Analog Measurements

DC Volts
The system can measure up to 250VDC. Measurements are made in a fully differential input mode up to 250V. Ranges include 0.2V, 0.6V, 2V, 6V, 10V, 20V, 60V, 200V and 600V (rated to 250V) and auto-range.

AC Volts
The system can measure up to 250VRMS. These true RMS measurements are provided with AC or AC+DC coupling. Ranges include 0.2V, 0.6V, 2V, 6V, 20V, 60V, 200V, 600V (rated to 250V) and auto-range.

Frequency
Frequency measurements can be made from DC to 10MHz. Higher frequencies can be performed if the test fixture includes a pre-scaler. The ground-referenced input can be from 300mV to 5V, and can be AC or DC coupled. The trigger level can be set in the range of ±2.2V.

Period
Period measurements can be made from 12.8 milliseconds to 128 seconds. The ground-referenced input can be from 300mV to 5V, and can be AC or DC coupled. The trigger level can be set in the range of ±2.2V, and can be set to respond to rising or falling transitions. Period measurements can be made with A and/or B inputs.

Counts
Counts can be made of up to 65,535 events based on the trigger event occurring. The ground-referenced trigger input can be from 300mV to 5V, and can be AC or DC coupled. The trigger level can be set in the range of ±2.2V, and can be set to respond to rising or falling transitions. Up to 5MHz signals can be counted.

Stimulus Capability

DC Volts
The System has three DC voltage signal sources, each of which can source up from ±10V, and providing up to 10mA of current. These sources are internally sensed.

Sine Wave
The System can provide sine wave output in the range of 100mV to 20Vp-p (7VRMS). The frequency selection range is 1Hz to 50KHz. Sine wave output is ground referenced and can provide up to 10mA of output.

Square Wave
The System can provide square wave output. Amplitude can be ground-reference to ±10V, or can be between two programmable amplitudes each from ±10V, with up to 10mA. The frequency selection range is 1Hz to 50KHz.

DC Current
The System provides two 100mA current sources with programmable voltage. Each source can be programmed to a compliance voltage between ±12V. When used together, the sources can provide up to 24V differentially.

Digital I/O
The standard configuration of the Analyst ems+ft includes 96 digital I/O pins. These pins can be relay-connected to the UUT in byte increments. Within each byte, each pin can be set to be an input (tri-state output) or an output. Since each pin has a 10K ohm pull-up (in conjunction with totem-pole outputs), it is compatible with most logic families. Logic high output can be selected to be +5V or +3.3V.

Boundary-Scan
The Analyst ems+ft can be configured with optional Boundary-Scan Test. This allows the System to be used with UUTs that have been designed to accommodate boundary-scan, or have on-board devices that support boundary-scan. In addition, boundary scan can be used by some programmable devices to perform in-system programming and program verification.

MultiWriter ISP Device Programming
The Analyst ems+ft can be equipped with the MultiWriter ISP programming and verification capability to simultaneously program up to 384 ISP devices in-circuit.