User Manual

1. SIGMA2 AND SIGMA LOGIC ANALYZERS
SIGMA2 and SIGMA are logic analyzers - development tools intended for
tracing and debugging of TTL (and compatible) digital signals.
SIGMA is an original version of the logic analyzer, it was being delivered until
November 2011. SIGMA2 is a new version which replaces original SIGMA; it
has been available since December 2011. SIGMA2 is practicaly the same as
SIGMA, it differs from its predecessor in following:
• new plastic enclosure
• different LED indication
• button added
• lower price
SIGMA2 name will be used in the following text for both logic analyzer versions
if the features are the same. If there is a difference, SIGMA2 and SIGMA will
be distinguished.
SIGMA2 is equipped with 256 Mb of memory and provides with up to 16 digital
inputs and sampling rates up to 200 MHz. Built-in data compression allows for
tracing of long running signals without exhausting logic analyzer memory.
When using all 16 inputs, guaranteed minimum capacity is 14 million samples.
SIGMA2 uses USB (Full-Speed, 12 Mbps) which ensures both data transfer and
power delivery with a single cable. There is no additional power supply needed.
2. INSTALLATION
Install ASIX SIGMA&OMEGA APPLICATION PACKAGE to your computer.
Connect SIGMA2 to a USB port or a USB hub using supplied cable. When a new
device has been detected by operating system and it is asking for a driver,
select option „install the driver from specific location“ and navigate to the
folder containing the driver (available on CD or for download at www.asix.net).
The driver is not digitally signed thus you will be prompted to confirm
installation of the driver.
Driver installation in Windows 7
For the driver instalation in Windows 7 use the latest driver downloaded from
web or the driver included on SIGMA2 accessory CD-ROM. In Windows 7 the
driver will not be installed automatically, it must be installed manually in a way
described further: Open Device Manager and find connected SIGMA2 logic
analyzer there. Open its properties window and select “Update driver”. Select a
location where the unpacked driver has been saved.
3. TARGET CONNECTION
The digital inputs are organized as two 8-pin ports (inputs 1 to 8 are merged
into port 1, inputs 9 to 16 are merged into port 2). Pin-to-pin skew between
inputs on a single port is rather low while it may be considerably higher
between the ports. Trigger In (TI) may be used to initiate trigger by an
external circuitry. Trigger Out (TO) indicates a trigger condition to an external
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