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The Agilent or Hewlett Packard 33120A is very reliable piece of equipment. It uses DDS techniques to create a stable, accurate output signal for clean, low distortion sine waves. It also gives you fast rise- and fall-time square wave, and linear ramp waveforms down to 100 μHz. Straightforward and intuitive front panel and menu system. You can use the 33120A to generate complex custom waveforms such as a heartbeat or the output of a mechanical transducer. With 12-bit resolution, and a sampling rate of 40 MSa/s, the 33120A gives you the flexibility to create any waveform you need. It also lets you store up to four 16,000-deep waveforms in nonvolatile memory. The 33120A has less than 0.04% total harmonic distortion in the audio band! Very nice 5-star unit.
Verified purchase: No
This is obviously not a bad product at all. It works fine for everyday signal generation (square, sine, triangle). However, it lacks an important feature: full duty cycle range for square wave generation. That remark, since I had to build some kind of fan regulator, that extends PWM pulse if it is too short. That function generator can be set only from 20% to 80%, not less, not more. That this lack of feature is not only related to the 33120A, but many signal generators have the same issue (short duty cycle range, if any). About easeness of use: when you adjust duty cycle, you have to be quick: 33120A remains only few seconds in that menu, and it switches back to frequency. Not very practical for PWM tests ... As a point of comparison, I have also an Agilent 33220A (a bit more recent) : it perfectly handles duty cycle from 1% to 99%, and it does not switch back to another menu if you adjust duty cycle. If I had to purchase a function generator, I would go rather for a 33220A than for a 33120A, that seems a bit overrated, especially in comparison of cheap chinese brands.Read full review
Verified purchase: No
Reliable and full featured piece of test equipment. The user manual is over 300 pages! Lots of operational options.
Verified purchase: Yes | Condition: Pre-owned
Although this FG puts out a clean signal and is pretty accurate with AC output, I find it a fairly annoying piece to work with. 1. I would like to easily turn the signal OFF. not 50 to 100mV....OFF. 2. A nasty menu system that makes setting up a sweep tedious. 3. Somebody turned off (GIPB) the ext sync on my unit and the manual says I can only turn it back on with the remote. So much for the used market. 4. The input fuse is PCB mounted and should be exterior. Over all I use an analog function(or signal) generator with knobs and buttons for most work but am looking for a replacement for my 33120A
Verified purchase: No
great product
Verified purchase: Yes | Condition: Pre-owned
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