rs232 serial communucation ports 25 pin female and 9 pin male.
SI_SCOPE is an advanced RS232 Analyzer that will save you hours of troubleshooting by allowing you to tap into any RS232 line and instantly examine all data flows, signal changes, and line status errors.

SI_SCOPE is the most complete RS232 Analyzer for the Windows Operating System and is compatible with a variety RS232 hardware (PCI, PCIe, PCMCIA, ExpressCard, and USB). SI_SCOPE can run in Async Mode using the included passive cable or Spy Mode for cable free monitoring of the internal data flows between any Windows program and an external RS232 device.

SI-SCOPE RS232 ANALYZER (See below for pricing and ordering information)

SI_SCOPE is a comprehensive byte level RS232 Analyzer for the PC that has been the choice of professionals world wide since 1994 to debug, analyze, or reverse engineer serial communications protocols. With SI_SCOPE you can eliminate guess work and quickly diagnose problems by viewing RS232 data and signal changes in real-time from your PC.

SI_SCOPE transforms your PC into an RS232 Analyzer without the need of expensive hardware or plug in boards. All that is required is a PC or laptop with two available serial ports running Windows 7 (x86/x64), Vista (x86/x64), XP, 2000, NT, ME, 98, or 95. SI_SCOPE's kernel mode drivers are engineered for serial analysis guaranteeing accurate data capture and time stamping from an RS232 line at baud rates up to 921.6 Kbps.

How Does SI-SCOPE Analyze an RS232 Circuit?

rs232 analyzer cabling diagram In Async mode SI_SCOPE monitors bidirectional communications by tapping the RS232 circuit with a specially wired passive cable. The diagram to the right illustrates how the passive cable operates. When RS232 data is transmitted from one device to the other the data is routed into the SI_SCOPE PC while being transmitted to the receiving device.

All RS232 data, error conditions, and signal changes are recorded and time stamped at the interrupt level by SI_SCOPE'S device drivers. SI_SCOPE'S interrupt driven design guarantees that the sequence of events are correctly maintained and the time between the events is accurately measured.

SI_SCOPE can also operate in single port mode to display one side of an RS232 link, operate in terminal mode allowing you to interactively transmit and receive with a device under test, or monitor a half duplex RS485 link (requires the use of an RS485 to RS232 converter or installation of an RS485 PCI or PCMCIA card).

SI_SCOPE's Async mode drivers support PCI, PCIe, PCMCIA, and ExpressCards under Windows 7, Vista, XP, 2000, NT, ME, 98, and 95. The installation program will detect the target operating system and correctly install the proper x86 or x64 kernel mode driver.

Spy Mode for Cable Free Monitoring

SI_SCOPE also has the ability to operate in Spy Mode. Spy mode is a software only solution that does not require any special cabling or dedicated ports. In Spy mode SI_SCOPE will insert a special kernel mode driver into the Windows driver stack and silently monitor all the activity between any Windows program and an external RS232 device.

Spy mode will work with any port enumerated by the Windows serial driver including internal PCI modems and USB serial devices. Spy mode supports Windows7 (x86/x64), Vista (x86/x64), XP, and 2000.

Is it Easy to Use?

rs232 analyzer screen in windows xp Very easy! Unlike similar products with complicated interfaces SI_SCOPE's user interface requires little or no learning curve. You can be productive with it out of the box and refer to the online help when needed.

SI_SCOPE's interface was designed to maximize the amount of serial data displayed while making it easy to see at a glance the source of the data. All data events, signal changes, and line status errors are time tagged and can be searched on in the review window.

Will SI-SCOPE Work For Me?

We guarantee it! If during the first 30 days you are not completely satisfied with SI_SCOPE you can return it for a refund.

Feature and Specifications

  • Async mode support for Windows7(x86/x64), Vista(x86/x64), XP, 2000, NT, ME, 98, and 95.
  • Time stamps included on every event with millisecond resolution.
  • Fully configurable RS232 parameters with support for user defined baud rates.
  • Analyze data in ASCII, EBCDIC, and HEX screen formats
  • Control signals (DTR, RTS, DCD, DSR, CTS, and RI) are recorded and time stamped allowing you to analyze where and when signal changes occur.
  • Line status errors can be recorded and time stamped allowing you to see precisely which device generated the error and when the error was detected.
  • File Capture option records data to disk as it is captured. Included conversion program exports a captured session into a binary (record format included in documentation) or ASCII text file format. ASCII format allows for user defined field delimiters for easy integration into third party word processing and spread sheet programs.
  • For long analyzer sessions the capture file can be automatically archived at a user defined time each day.
  • Capture file can be saved and reloaded into SI_SCOPE for review at a later time.
  • Programmable triggers allow you to activate and deactivate data capture based on incoming data streams. Wildcards are supported!
  • Terminal mode allows you to send data to the device under test from the keyboard and observe responses. Programmable macros allow complex data sequences to be transmitted at the touch of a key.
  • ASCII charts, popup rulers, and time cursors provide the tools you need to analyze serial protocols.
  • Search Engine can scan through captured data for any data pattern, signal change, or error condition.
  • Spy mode for cable free debugging under Windows7 (x86/x64), Vista (x86/x64), XP, and 2000.
  • Included Passive Cable allows for bidirectional monitoring of all data and control signals.
  • Supports any 2 user defined port addresses and any 2 IRQs. Shared IRQ multi port cards as well as PCMCIA and PCIe ExpressCard devices for laptops are also supported.
  • Supports USB RS-232 converters.  Please read our FAQ if you plan on using a USB converter.
  • Supports half duplex RS485 communications analysis and 9 bit protocols when used with an RS485 converter.
  • Comprehensive online manual included in both Windows Help and Adobe PDF format.

Pricing and Ordering (All Orders Before 3PM EST Ship Same Business Day)

Description Item Code Price Purchase
product photo SI_SCOPE RS232 Analyzer. CD media with  passive cable. Our legacy DOS version is included on the CD at no extra cost.
SISCOPE $219.95
product photo SI_SCOPE Download Edition. Available for immediate download. You will need to assemble the passive cable using the included documentation.
SISCOPE-DE $189.95
product photo SI_SCOPE PCMCIA Card Bundle. Includes SI_SCOPE CD, passive cable, and Quatech DSP-100 dual port PCMCIA card. Turn your laptop into a portable RS232 Analyzer with this package!
SISCOPE-DSP $399.95
product photo SI_SCOPE Express Card Bundle. Includes SI_SCOPE CD, passive cable, and Quatech DSPXP-100 dual port 54mm ExpressCard. Turn your ExpressCard enabled laptop into a portable RS232 Analyzer with this package!
SISCOPE-EXP $399.95
product photo SI_SCOPE USB232 Card Bundle. Our most popular card bundle! Includes SI_SCOPE CD and passive cable bundled with a durable small footprint dual port USB serial adapter. Perfect solution for systems without expansion slots such as netbooks. This adapter utilizes the latest FTDI chipset with a configurable latency timer for optimum performance.

For more information on data capture with USB devices please read our FAQ.

SISCOPE-USB232 $249.95