User Manual

device (e.g. for measuring signal slope in particular conditions by an

oscilloscope).

Fig. 1: Target connector

SIGMA2 is equipped by high impedance inputs with TTL logic levels (with 1 MΩ

pull-down resistor).

Capacitance of probe cables should be taken into consideration when

connecting to a debugged application, otherwise a cross-talks of fast signals

may occur. The leads of the supplied cable with individual pins may be split to

reduce capacitance between adjacent wires.

4. INDICATORS AND BUTTON

SIGMA2 (new logic analyzer version only)

Main panel contains two bi-color LED indicators providing an operator with

quick status information.

  ONLINE / BUSY (green/yellow LED)

• off: no USB power or USB is in Sleep mode or

no USB driver has been installed

• green: SIGMA2 was configured and it has been in idle state

• yellow: SIGMA2 is acquiring data

  TRIGGER STATUS (red/yellow LED)

• off: trigger inactive - no trigger condition has been detected

• red: SIGMA2 is waiting for trigger condition

• yellow: flashes when trigger condition or trigger pattern has been

matched

The GO button helps to control the analyzer comfortably - it cyclically switches

among essential operation states. When it is pressed in idle state the test is

launched. When it is pressed in running state the trigger is initiated. And when

it is pressed in triggered state the test is stopped, idle mode is launched and

the data transfer from logic analyzer memory to PC begins.

SIGMA (old version of logic analyzer only)

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