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Agilent Technologies 8156A manual Clearing the Input Queue, Output Queue, Error Queue

Models: 8156A

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Programming the Attenuator

How the Attenuator Receives and Transmits Messages

b.Clears Bit 7 (MSB).

2.No modification is made inside strings or binary blocks. Outside strings and binary blocks, the following modifications are made:

a.Lower-case characters are converted to upper-case.

b.The characters 0016 to 0916 and 0B16 to 1F16 are converted to spaces (2016).

c.Two or more blanks are truncated to one.

3.An EOI (End Or Identify) sent with any character is put into the

input queue as the character followed by a line feed (LF, 0A16). If EOI is sent with a LF, only one LF is put into the input queue.

4.The parser starts if the LF character is received or if the input queue is full.

Clearing the Input Queue

Switching the power off, or sending a Device Interface Clear signal, causes commands that are in the input queue, but have not been executed to be lost.

The Output Queue

The output queue contains responses to query messages. The attenuator transmits any data from the output queue when a controller addresses the instrument as a talker.

Each response message ends with a LF (0A16), with EOI=TRUE. If no query is received, or if the query has an error, the output queue remains empty.

The Message Available bit (MAV, bit 4) is set in the Status Byte register whenever there is data in the output queue.

The Error Queue

The error queue is 30 errors long. It is a FIFO queue (first-in first- out). That is, the first error read is the oldest error to have occurred. A new error is only put into the queue if it is not already in it.

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Agilent Technologies 8156A manual Clearing the Input Queue, Output Queue, Error Queue
Page 83 Page 85

8156A specifications

Agilent Technologies 8156A is a high-performance optical source offering advanced capabilities for testing and characterizing optical systems. Specifically designed for applications in telecommunications and data communications, the 8156A stands out due to its precision, versatility, and reliability, making it an essential tool for engineers and researchers in the telecommunications industry.

One of the main features of the 8156A is its ability to generate a stable, accurate, and tunable optical signal. This optical source operates across a wide wavelength range, typically from 1260 nm to 1675 nm, covering key regions used in fiber optics. The tunable laser module is particularly beneficial for applications requiring the testing of fiber optic components, systems, and networks, enabling users to specify any wavelength within this range.

The device employs advanced technologies, including distributed feedback (DFB) laser technology, offering low noise and high output power while ensuring minimal phase and frequency jitter. This results in precise measurements that are crucial for evaluating the performance of optical devices. The 8156A also features a built-in optical power meter, allowing for seamless integration and real-time monitoring of optical power levels during testing.

Another significant characteristic of the 8156A is its user-friendly interface, which includes easy-to-read displays and intuitive controls. This design simplifies operation, allowing users to set up tests quickly and efficiently. Additionally, it provides various output options, including single-mode and multi-mode fiber interface compatibility, expanding its usability across different applications.

The 8156A is equipped to handle numerous protocols and systems, including passive optical networks (PON), optical transport networks (OTN), and traditional wavelength-division multiplexing (WDM) technologies. Its agility in adapting to various protocols enhances its role in research and development settings.

Moreover, the device offers a range of automation features, enabling users to script complex measurement sequences, making it an adaptable solution for both laboratory and field environments. Combined with its robust build quality, the Agilent Technologies 8156A optical source not only ensures reliable operation but also provides a long service life, making it a valuable investment for any optical testing application.