$7 for a 0-40MHz Test Generator?

[Robb]

AD9850 DDS Signal Generator Module 0-40MHz Test Equipment Sine Square Wave | eBay

Has anyone bought one of these and tried it?

Seems to be an easy and low-cost solution for a signal generator for someone's radio room.

Was thinking about getting one and hooking it up.

Might work as a reliable/stable test piece for receiver alignments!

 

[mr_fx]

that might be my next toy

 

[Rb30]

Assume that it tunes via r13, It would be really touchy to tune.
I wonder how stable it is?

 

[Robb]

I think if a freq counter kit and a very stable power supply were to be used with it, it would work. The clarity of the freq sine wave changes @40mhz. The square wave will work from 0-1mhz, as the specs say.

Stability and accuracy have to be far better than an analog generator. If you ever owned a cheapie $35 analog generator and used one for radio alignments; then one could appreciate what this board may provide. It may be be a welcome tool - in comparison.

NEW AD9850 DDS signal generator module 0-40MHz 2772
Features:
2 sine wave and 2 square wave output
AD9850: 0-40MHz
After the 20-30MHz frequency harmonics increases, the waveform will be less and less clean
Square Wave: 0-1MHz
Low-pass filter with 70MHz, so the waveform better than SN
Parallel and serial data input can be selected via a jumper
DA produced the benchmark pin (PIN12) leads for easy adjustment to do the magnitude of the output waveform Application
Comparator reference input voltage generated by the variable resistor, the resistor can be adjusted duty cycle square wave of different
Active AD9850 125MHz crystal oscillator modules
Package Contents
100% Brand New
1 x AD9850 DDS signal generator module



Here is a better view:

 

[unit_399]

$7.00 is chump change. It's worth it just to give it a look. I'm gonna order one.

- 399

 

[Mudfoot]

Any results yet? I think out local electronic supply shop has something similar to this in kit form.