The Sony/Tektronix 308 Is a keyboard-controlled, multifunctional, portable data analyzer, intended to meet the need for a portable and inexpensive service aid. The 308 can also be used as a digital design instrument and as a production-line checkout tool for in-circutt tests. Four modes of operation provide the user with a variety of data-analyzing methods. This instrument can be used for timing analysis of parallel signals, state analysis of parallel signals, state analysis of serial transmissions (including data communications), and signature analysis. MODES OF OPERATION Parallel Timing Analyzer Function When used as a Parallel Timing analyzer, the 308 provides an eight-channel input, a 20 MHz clock speed, and 252 bits/channel memory size. The eight-channel parallel word recognizer triggers upon recognition of a preset digital word. This word-recognition capability is expandable to 24 channels with an accessory word recognizer probe. If no preset data is specified, the 308 software immediately generates an internal trigger at the start of an acquisition. The digital delay counts up to 65,535 clocks. Data sampled before or after the delayed trigger can be stored either at sample intervals ranging from 50 ns to 200 ms or synchronously with an external clock. The latch input allows the 308 to capture glitches narrower than the sample interval. Stored data is displayed on the crt in digitized timing format representing the HI and LO levels of the stored data, but not the actual waveform. Parallel State Analyzer Function The Parallel State Analyzer function is identical to the Parallel Timing Analyzer function except for the display. Data is displayed in binary, octal, and hexadecimal formats. Serial State Analyzer Function When operated as a Serial State analyzer, the 308 receives serial data which conformsto EIASTD RS-232-C. Data of five, six, seven, or eight bits per character may be inputted using either synchronous or asynchronous timing. A two-character word recognizer provides internal triggering upon recognition of a preset digital word. The digital delay counts up to 65,535 words. Data sampled before or after the delayed trigger can be stored, using an internal clock, at baud rates of 50 Hzto9.6 kHz or using an external clock. Stored data is displayed on the crt readout in binary, hexadecimal, and ASCII formats. USING THE 308 The 308 is a versatile service and design aid that features simplicity of operation while being adaptable to a wide variety of applications. Qualified personnel can first establish the proper setup for a particular application (e.g., trigger data, display mode, and entry format). Operators can then use the instrument to make routine in-circuit tests. Illustrations contained in this manual may also be helpful as guides. There are many variables at the operator's control that affect the mode, timing, comparison of previously-acquired data with new data, and other subfunctions. These are easily selected if needed. Several examples that may be adapted to your particular needs are shown in this manual. These are but a few; many more uses will be found with continued utilization of the 308.