Tektronix Inc., has introduced a new entry-level Arbitrary/Function Generator. The AFG1022 is targeted at educational institutions and supports a wide range of use cases and course subjects. The AFG1022 also integrates with the new TekSmartLab wireless lab instrument management solution.
Michael Ewald, General Manager, Bench Products, Tektronix stated that “Tektronix strongly believes that a rich hands-on experience dramatically improves education outcomes, that’s why we are working hard to meet the needs of colleges and universities including good price-performance on instrumentation, integrated courseware and ease of administration.”
Key performance specifications include dual-channel, 25 MHz bandwidth with 1 mVpp to 10 Vpp output, 14-bit vertical resolution and 1 µHz frequency resolution. It provides a 125 MS/s sample rate along with 64 MB of built-in non-volatile memory and USB memory expansion for user-defined waveforms.
On the functionality side, the instrument offers 50 built-in standard functions and arbitrary waveforms with continuous, modulation, sweep and burst modes to cover almost all the test requirements found in basic education labs. A built-in 200 MHz counter with 6-digit resolution offers an easy and precise way of performing frequency, period, pulse width, and duty cycle measurements.
Tektronix Entry-level Function Generator – [Link]
by TheSignalPathBlog @ youtube.com:
In this episode Shahriar repairs an Agilent 33250A function and arbitrary waveform generator which does not power on. The unit is equipped with a soft power switch which might be responsible for the fault. After a brief look at the unit’s constructions, the fault is traced to a few possible locations.
The schematic of the soft power circuitry is presented and the internal switching power supply is closely examined. After the fault is located, the repair is presented. The block diagram and operation of a current mode DC-DC switching IC is also presented.
Teardown and Repair of an Agilent 33250A Function and Arbitrary Waveform Generator – [Link]
Farnell element14 have announced that they will be stocking the BitScope BS10 measurement device which combines a 2-channel USB oscilloscope, spectrum analyzer, 8-channel logic analyzer and function generator. You can use it with a PC running Windows or Linux, an Apple Mac or even a Raspberry Pi. Sampling rate is up to 40Msample/s giving it an analog bandwidth of 20MHz. The software supports frame rates beyond 20Hz and includes a ‘digital phosphor’ display mode. Resolution is up to 12bits.
Farnell element14 and the BitScope – [Link]
by Philippe Duboisset:
This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier. The homemade function generator is a quite common project on the internet. We can find different ways to do it:
– The quick & dirty way based on a DDS module bought on eBay
– The analog version based on a MAX038 / XR2206
– The clean way based on a FPGA and a fast DAC (e.g. http://www.circuitben.net/node/14)
– The software way (e.g. Arduino + R/2R DAC)
From my side, I wanted a small one which could fits my needs without being too expensive. According to me, such generator should at least:
– Be easy to use
– Output a signal from 1Vpp to 10Vpp (+/-5V), from 0 to 1MHz
– Have a low profile
– Without electric hazard (shall work on a 12V DC)
Tiny DDS – Open source DDS generator – [Link]
Dave explains a big trap in high frequency measurement with your oscilloscope. Based on a viewer request, Dave demonstrates how to incorrectly and then correctly measure the signal output level over frequency of your function generator using your oscilloscope. Some whiteboard transmission line theory is thrown in as well.
EEVblog #652 – Oscilloscope & Function Generator Measurement Trap – [Link]
An all-in-one breadboard with Oscilloscope, Spectral Display, Function Generator, and Power Supply.
We are excited to bring a low-cost audio range electronics development board to classrooms, labs, small businesses, and techno-geeks everywhere. This idea has been bouncing around in our family for many years and now the technology has caught up to make it a reality at a price that schools and individuals can afford. We have paired a traditional prototype board (or breadboard) with an electronics suite so that the experimenter does not have to purchase the expensive electronics test equipment needed during development. It is everything we wish we had when we were learning about circuits on a breadboard.
Bakerboard: The Educational Breadboard with More – [Link]
by Petre Petrov:
This simple, robust, and low-cost signal generator, based on the LM386 power amplifier IC, provides a trio of audio-band signals with three different simultaneous outputs at the same frequency: square/rectangle (SQW), triangle (TRG), and sine (SS).
Audio Function Generator Provides Three Simultaneous Square, Triangle, Sine Waveforms – [Link]
This video reviews the two most common reasons why the output amplitude setting on a function or signal generator doesn’t match what is read on an oscilloscope. This can be due to an incorrect attenuation setting on the scope, but is most commonly due to the fact that the generator is not presented with the load impedance that it is expecting. To correct this most common case, you can either use the correct load impedance, or tell the generator what load you are presenting it with.
Why your Function Generator’s output voltage reading can be wrong – [Link]
This video discusses how to measure the ESR (equivalent series resistance) of a capacitor using an oscilloscope and function generator. All of the capacitors tested in this video were 220uF electrolytic caps. In reality, the resistance in the plates of a dried out electrolytic capacitor can’t be modeled as a simple series resistor, but for the purposes of identifying good from bad, this simplification works fine.
Measure Capacitor ESR with an Oscilloscope and Function Generator – [Link]
Harrymatic @ instructables.com writes:
I was in need of a function generator to produce audio signals for testing effects / amplifiers; as well as TTL clock signals for digital circuits. As function generators generally cost about £200 new, I decided that I would instead build one myself.
This project uses the XR-2206 integrated circuit to generate the waveform. It can produce sine and triangle waves of selectable amplitude and frequency and also a TTL sync signal fixed at 5V. The frequency range is about 20Hz to 300KHz – so this function generator will easily cover the full human hearing range of frequencies.
Analogue Function Generator – [Link]