Basic Digital Operation

Using Waveform Markers

Saving Marker Polarity and Routing Settings

Marker polarity and routing settings remain until you reconfigure them, preset the signal generator, or cycle the PSG power. To ensure that a waveform uses the correct settings when it is played, set the marker polarities or routing (RF Blanking and ALC Hold), and save the information to the file header (page 72). This is especially important when the segment plays as part of a sequence because the previously played segment could have different marker and routing settings.

ALC Hold Marker Function (For Instruments with serial prefixes >=US4722/MY4722)

While you can set a marker function (described as Marker Routing on the softkey label) either before or after you set marker points (page 95), setting a marker function before setting marker points may cause power spikes or loss of power at the RF output.

Use the ALC hold function by itself when you have a waveform signal that incorporates idle periods, or when the increased dynamic range encountered with RF blanking (page 100) is not desired.

The ALC hold marker function holds the ALC circuitry at the average (RMS) value of the sampled points set by the marker(s). For both positive and negative marker polarity, the ALC samples the RF output signal (the carrier plus any modulating signal) when the marker signal goes high:

Positive:

The

signal

is

sampled

during

the

on marker points.

Negative

The

signal

is

sampled

during

the

off marker points.

The marker signal has a minimum of a two sample point delay in its response relative to the waveform signal response. To compensate for the marker signal delay, offset marker points from the waveform sample at which you want the ALC sampling to begin.

NOTE Because it can affect the waveform’s output amplitude, do not use the ALC hold for longer than 100 ms. For longer time intervals, refer to “Setting Power Search Mode” on page 247.

Positive Polarity

CAUTION Incorrect ALC sampling can create a sudden unleveled condition that may create a spike in the RF output, potentially damaging a DUT or connected instrument. To prevent this condition, ensure that you set markers to let the ALC sample over an amplitude that accounts for the higher power levels encountered within the signal.

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Chapter 3

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Agilent Technologies E8267D PSG, E8257D PSG manual Saving Marker Polarity and Routing Settings
Page 103 Page 105

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.

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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.

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