TRANSPARENCY MODES

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Pseudo Transparency Mode

The ULTRA has its own form of transparency, called pseudo transparency mode (PTM). Unlike IBM 35h and Xerox 36h transparency, pseudo transparency can be used in both DSC and SCS data streams.

This type of transparency has two forms: Trigger 1 + Trigger 2 (or two- trigger) and Trigger 1 + count byte (or one-trigger). In either trigger method, the only valid characters following the trigger sequence are the numerals 0-9 and the letters A-F.

The type of pseudo transparency selected is determined by Option #30 — Pseudo Transparency Mode Selection. The default is (A) Trigger 1 + Trigger 2. If the user selects (B), Trigger 1 + Count Byte PTM will be used.

Trigger 1 + Trigger 2 PTM

In the two-trigger mode, the user selects the trigger using any two characters that are not commonly found together in the printable data stream (see Section 5 — Configuration Options and refer to Options 32-35 for information on restrictions on the selection of triggers). The default trigger characters are a cent sign and a dollar sign (¢$).

In this method, no count byte is required. Rather, all pairs of bytes following the trigger are combined and printed until terminated with an invalid character (valid characters are 0-9 and A-F).

Note: The system may insert a NL command (an invalid character) in the data stream. This will terminate two-trigger pseudo transparency.

In the following examples, the cent sign-dollar sign sequence (¢$) is used as the trigger. Note that the cent sign (an invalid character) is also used as the terminator.

To send one ASCII escape character requires five input characters — the first trigger (¢), the second trigger ($), the hexadecimal ASCII escape character (1Bh) and an invalid character/terminator (¢):

¢$1B¢

To send the Xerox 4045 reset sequence requires nine characters — the first trigger (¢), the second trigger ($), the hexadecimal reset sequence (1Bh, 2Bh and 58h) and an invalid character/terminator (¢).

¢$1B2B58¢

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Agilent Technologies 6287 manual Pseudo Transparency Mode, Trigger 1 + Trigger 2 PTM, Transparency Modes
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6287 specifications

Agilent Technologies 6287 is a high-performance signal generator specifically designed for advanced electronic testing and measurement applications. Recognized for its robustness and versatility, the 6287 caters to various sectors, including telecommunications, automotive, aerospace, and semiconductor industries. One of its main features is its capability to generate a wide range of frequencies, making it ideal for comprehensive testing of components and systems.

The Agilent 6287 boasts a frequency range extending from 10 MHz to 6 GHz, which allows users to perform tests across a broad spectrum of applications, including RF and microwave devices. Its excellent output power levels provide a significant advantage when dealing with devices requiring high signal strengths for accurate testing. Additionally, the unit supports various modulation techniques, including AM, FM, PM, and pulse modulation. This versatility ensures that engineers can evaluate the performance of devices under different signal conditions, crucial for real-world applications.

Another defining characteristic of the Agilent 6287 is its exceptional phase noise performance, delivering reliable and accurate results. High-phase noise can obscure signal testing results, making the 6287's low levels a critical factor for effective device evaluation. The generator's time domain capabilities add further value, allowing engineers to analyze signals in both frequency and time domains effectively.

With a user-friendly interface, the 6287 simplifies operation while supporting a wide range of programming capabilities. This makes it easy to integrate into automated test setups or to control it via standard programming languages, enhancing flexibility for engineering teams. The device also features advanced synchronization options that facilitate multi-instrument setups, allowing seamless collaboration with other measurement tools.

The Agilent Technologies 6287 is built with robust construction and thermal management features, ensuring reliable performance in demanding environments. Its compact design enables easy installation in test racks or mobile test setups. Overall, the Agilent 6287 signal generator is a powerful tool that stands out in the field of electronic testing, efficiently meeting the evolving needs of modern engineering applications. Its mixture of frequency versatility, modulation support, excellent phase noise performance, and user-friendly operation makes it an indispensable asset for professionals working with complex signal testing scenarios.
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