High Frequency Square Wave Generator: 500 MHz, 2 Channels

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Discussion Overview

The discussion revolves around the search for a high-frequency square wave generator capable of operating above 500 MHz with two channels. Participants explore various options, including commercial products and potential DIY solutions, while considering the specifications and costs associated with such devices.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about a high-frequency square wave generator and seeks affordable options.
  • Another participant asks for clarification on whether the requirement is for a generator with 500 MHz analog bandwidth or one that produces a square wave with a specific period.
  • Some participants mention that pulse pattern generators from companies like Agilent or Anritsu are available but may be expensive, ranging from $10,000 to $30,000.
  • There is a suggestion that Direct Digital Synthesis (DDS) chips could be a potential solution, though uncertainty exists about their capability to output 500 MHz.
  • One participant proposes using a 500 MHz sine wave with diodes to create a square wave, but notes challenges in altering the duty cycle.
  • Specific models of pulse generators, such as the Agilent HP 8133A and Agilent 81130A, are mentioned, along with their price ranges.

Areas of Agreement / Disagreement

Participants generally agree that a true 500 MHz, two-channel square wave generator is likely to be expensive. However, there is no consensus on the best approach to obtain such a generator, whether through commercial products or DIY methods, and various opinions on the feasibility of different solutions are presented.

Contextual Notes

Participants express uncertainty regarding the specific requirements for the generator, such as the need for a square wave versus a sine wave conversion, and the implications of altering the duty cycle. There are also limitations in knowledge about the capabilities of DDS chips for this frequency range.

SwissApe
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Greetings,

Sorry to bother you with such a trivial question, but I'm looking for a high frequency (>500 MHz) 2 channels square wave generator.
Do you know any material (not too expensive if possible) that would match these specifications?

Many thanks!
 
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Can you be a bit more specific?
Do you mean a generator with a 500 MHz analog bandwidth OR a generator that can produce a 50-50 square wave with a 1/500e6 s period?
In either case it sounds like you are asking about something called a pulse pattern generator. You can buy them from e.g. Agilent or Anritsu.
The price will probably be somewhere in the range $10 000-$30 000.
 
SwissApe said:
Greetings,

Sorry to bother you with such a trivial question, but I'm looking for a high frequency (>500 MHz) 2 channels square wave generator.
Do you know any material (not too expensive if possible) that would match these specifications?

Many thanks!

500MHz 50 Ohm signal generators are available, but I don't know about the square wave part. What are you intending to use it for? 500MHz square waves exist on high-speed digital integrated circuits, but are not generally driven off-chip.
 
i was going to suggest DDS but doubt there's any chip out there to work with
 
f95toli is right, a real 2 channel square wave generator capable of 500Mhz is going to be pretty expensive.

But I'm guessing that you're interested in making something?

DDS - (Direct Digital Synthesis) chips are interesting. Analog Devices makes some but I'm not sure if you can get 500Mhz output from these.

Look up "astable multi-vibrator" circuits. Depends on your purpose, of course, but a simple circuit might be good enough.
 
I don't know if this would satisfy your needs, but couldn't you take a 500mHz sine wave and put two diodes in anti-parallel across the output, amplify the voltage if necessary, then use zener diodes to help eliminate the non-horizontal parts of the wave?

The problem comes if you need to alter the duty cycle of one part of the wave.
 
Last edited by a moderator:
Many thanks for all your answers, I'll see what I can find in commercial pulse generators... I'm afraid I'm not good enough to make such a device on my own.
 

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