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Old 5th July 2016, 02:40 PM   #1
Deafboy is offline Deafboy  Canada
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Default Looking for signal generator capable of more than 10 Vp-p

Hi,

As the title mentions, I am looking for a signal (sine, square, etc.) capable of more than the standard 10 Vp-p in a 50 Ohm load. My current need is 15 MHz but of course wouldn't mind if it goes higher than this. Arbitrary and GPIB capability is a bonus. Can you recommend models of generators that can achieve this?

Michel
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Old 5th July 2016, 02:46 PM   #2
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I have a HP 3325B with the high-voltage option (002). The output goes to 40 Vpp into high-Z loads (500 Ohm, 500 pF) up to 1 MHz.

If you truly need high voltage up to 15 MHz into 50 Ohm, a dedicated amplifier might be the better/only option.

Samuel
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Old 5th July 2016, 04:33 PM   #3
anatech is offline anatech  Canada
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Hi Michel,
I'm going to agree with Samuel. You really need a power amplifier, which then frees you up on the choice of generator. Of course, you are looking for an RF power amplifier and you'll have to watch the match between load and amplifier.

-Chris
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Old 5th July 2016, 04:44 PM   #4
Deafboy is offline Deafboy  Canada
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Hi Guys,

Thanks for the comments. You have convinced me to amplify the signal. The Mini-Circuits ZHL-2-8X-S+ appears to me to be adequate for my needs. My application is to drive a laser diode (having a 50 Ohm load).
Thanks.

Michel
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Old 7th July 2016, 06:04 AM   #5
1audio is online now 1audio  United States
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You might be better off with a specific laser diode driver. Either build a recommended circuit or get one of the instruments meant for this: https://www.avtechpulse.com/laser/ or Picosecond to nanosecond laser diode pulser - T165 It depends on what you need to do. If a square wave drive is OK you may be able to do something with a bunch of paralleled Shottky buffers. What is the forward voltage of the diode?
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