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Agilent Technologies E8267D PSG, E8257D PSG manual Triggering Waveforms, Setting Marker Polarity

Models: E8267D PSG E8257D PSG

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Basic Digital Operation

Triggering Waveforms

Setting Marker Polarity

Setting a negative marker polarity inverts the marker signal.

1.In the Marker Utilities menu (page 92), press Marker Polarity.

2.Select the marker polarity as desired for each marker number.

Default Marker Polarity = Positive

Set each marker polarity independently.

See Also: “Saving Marker Polarity and Routing Settings” on page 90.

As shown on page 100:

Positive Polarity: On marker points are high (≈3.3V).

Negative Polarity: On marker points are low (0V).

Triggering Waveforms

Triggering is available in both ARB and real- time formats. ARB triggering controls the playback of a waveform file; real- time custom triggering controls the transmission of a data pattern. The examples and discussions in this section use the Dual ARB Player, but the functionality and method of access (described on page 104) are similar in all (ARB and real- time) formats.

Triggers control data transmission by telling the PSG when to transmit the modulating signal. Depending on the trigger settings, the data transmission may occur once, continuously, or the PSG may start and stop the transmission repeatedly (Gated mode).

A trigger signal comprises both positive and negative signal transitions (states), which are also called high and low periods; you can configure the PSG to trigger on either state. It is common to have multiple triggers, also referred to as trigger occurrences or trigger events, occur when the signal generator requires only a single trigger. In this situation, the PSG recognizes the first trigger event and ignores the rest.

When you select a trigger mode, you may lose the signal (carrier plus modulation) from the RF output until you trigger the modulating signal. This is because the PSG sets the I and Q signals to zero volts prior to the first trigger event, which suppresses the carrier. If you create a data pattern with the initial I and Q voltages set to values other than zero, this does not occur. After the first trigger event, the signal’s final I and Q levels determine whether you see the carrier signal or not (zero = no carrier, other values = visible carrier). At the end of most data patterns, the final I and Q points are set to a value other than zero.

There are four parts to configuring a waveform trigger:

•Source determines how the PSG receives the trigger that initiates waveform play.

•Mode determines the waveform’s overall behavior when it plays.

•Response determines the specifics of how the waveform responds to a trigger.

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Chapter 3

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Agilent Technologies E8267D PSG, E8257D PSG manual Triggering Waveforms, Setting Marker Polarity
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E8267D PSG, E8257D PSG specifications

Agilent Technologies, a recognized leader in electronic measurement and communications solutions, offers a comprehensive range of signal generators, including the E8257D PSG (Pulsed Signal Generator) and E8267D PSG. These instruments are engineered to meet the demanding requirements of wireless communication, aerospace, defense, and various research applications.

The E8257D PSG is known for its versatility and reliability. It operates within a frequency range of 250 kHz to 40 GHz, making it suitable for a wide array of applications, from signal generation to vector modulation. With an output power capability of up to +30 dBm, it delivers high-quality signals with exceptional precision. Its low phase noise performance is especially critical for applications such as radar and communication system testing, where signal integrity is paramount.

One of the standout features of the E8257D is its advanced modulation capabilities, including analog and digital modulation schemes. This flexibility allows engineers to simulate real-world communications environments accurately. The PSG also features a built-in arbitrary waveform generator that enables users to create complex waveforms tailored to specific testing needs, providing a significant advantage in research and development.

On the other hand, the Agilent E8267D PSG is designed to cater to the needs of users requiring a combined signal generation and analysis solution. With the capability to generate signals from 250 kHz to 67 GHz, the E8267D is ideal for millimeter-wave applications, as well as testing next-generation wireless technologies.

This model includes features such as enhanced phase noise performance and faster switching speed, which are crucial for signal integrity in sophisticated networks. The instrument's intuitive user interface and powerful software integration facilitate effortless operation and automation, thereby improving workflow efficiency.

Both the E8257D and E8267D PSG instruments incorporate cutting-edge technologies such as low-noise microwave and RF components, as well as digital signal processing capabilities. They provide users with enhanced accuracy and reliability in their measurements.

In summary, Agilent Technologies' E8257D and E8267D PSG signal generators represent the pinnacle of precision in signal generation technology. With their extensive feature sets, advanced modulation capabilities, and robust performance specifications, these instruments are invaluable tools for engineers and researchers working across various high-tech industries.