Working with Modulation Types

Custom Arb Waveform Generator

		Bits						Custom Real Time Only
	Modulation Type	Per	Bit Rate =		Internal Symbol Rate				External Symbol Rate
	Modulation Type	Symbol	Symbols/s x Number of		(Minimum Maximum)				(Minimum Maximum)
		Symbol	Symbols/s x Number of		(Minimum Maximum)				(Minimum Maximum)
			Bits/Symbol

QAM	4QAM	2	90 bps − 100 Mbps		45	sps − 50 Msps		45	sps − 25 Msps
Quadratu
Quadratu	16QAM	4	180	bps − 200 Mbps	45	sps − 50 Msps		45	sps − 12.5 Msps
re
Amplitud	32QAM	5	225	bps − 250 Mbps	45	sps − 50	Msps	45	sps − 10 Msps
e	32QAM	5	225	bps − 250 Mbps	45	sps − 50	Msps	45	sps − 10 Msps
e
Modulatio	64QAM	6	270	bps − 300 Mbps	45	sps − 50	Msps	45	sps − 8.33 Msps
n	64QAM	6	270	bps − 300 Mbps	45	sps − 50	Msps	45	sps − 8.33 Msps

	128QAM	7	315	bps − 350 Mbps	45	sps − 50	Msps	45	sps − 7.14 Msps
	There is no preset value for this
	modulation, it must be user
	defined.

	256QAM	8	360	bps − 400 Mbps	45	sps − 50	Msps	45	sps − 6.25 Msps

Working with Modulation Types

The Modulation Type menu enables you to specify the type of modulation applied to the carrier signal when the Mod On Off hardkey is on.

When the Custom Off On softkey is on:

•For Custom Arb, the BBG (baseband generator) creates a sampled version of the I/Q waveform based on a random data pattern and the modulation type that has been selected.

•For Custom Real Time I/Q, the real- time custom I/Q symbol builder creates I/Q symbols based on the data pattern and modulation type that has been selected (see “Working with Data Patterns” on page 166 for information on selecting a data pattern).

In Custom Real Time I/Q, you can also:

•Create user- defined modulation type (see page 156) that can be used immediately or saved to the Memory Catalog.

•Restore all modulation parameters to their default state.

To Select a Predefined Modulation Type

1. Press Preset.

2. Press Mode > Custom > ARB Waveform Generator > Digital Mod Define > Modulation Type > Select or

Mode > Custom > Real Time I/Q Baseband > Modulation Type > Select

3. Select one of the available modulation types.

NOTE If you select QPSK and OQPSK, you must make a specific selection from the menu that displays.

Chpater 6

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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.

Agilent Technologies E8257D PSG, E8267D PSG manual Working with Modulation Types

Models: E8267D PSG E8257D PSG

Custom Arb Waveform Generator

Working with Modulation Types

Custom Real Time Only

64QAM

Working with Modulation Types

To Select a Predefined Modulation Type

E8267D PSG, E8257D PSG specifications