Bought 2 boards populated with everything except the OCXO. I fitted my Bliley OCXOs and the PCBs work well. Shipping was fast, and the packaging was good. Overall very happy with my oscillators. The adjustment is very sensitive, perhaps consider a larger number of turns trimmer pot for more precise adjustment.
EDIT: Thanks, I didn't even look, just assumed I had Rev C. You are correct of course, these resistors on Rev D allow me to solve the problem completely. As you correctly point out, most references will want around 2.5V, so I will probably change my pot to a 10K or 20K pot instead of the 50K pot. This also increases the number of turns per Hertz. Please note: I am being really, really picky here, mine is tuned to within 10 millihertz straight out of the packet.
Response from IR AnalysIR-Infrared decoder & anlayzer OCXO 10Mhz | Jan. 19, 2018
Glad they are working out for you & thanks for the feedback. We will give your suggestion some consideration, for the next revision of the PCB.
Some thoughts: - I believe you have the latest Rev_D of the PCB - In this rev, you can get more sensitivity by replacing R1&R3 with higher value resistors. Ideally, they should have the same value, but that will depend a lot on whether the Vfc for your OCXO is close-ish to 2.5V (or nearer one of the extremes) They are in series with the POT and by increasing their values you can effectively increase the adjustment resolution, by reducing/narrowing the adjustment range. I will also email you the latest schematic directly. (let me know via PM if you need more info on this) - FYI: In my experience with these OCXOs, including the Bliley, the adjustment sensitivity is sufficent to 'tune' within the operation range of this class of OCXO.
UPDATE: I just checked and it looks like there are pots with more turns & the same footprint available. I will order some in to evaluate with a view to offering them and an upgrade option. So not need to wait for a new PCB revision :) Existing users, can simply desolder & replace the existing one, if required.
I had previously used "IRToy" and then a breadboard home brew version for handling testing IR projects; but a recent AC (air conditioning) project showed shortcomings in both. The LearnIR works perfectly with AnalysIR and is easily integrated into a project if needed. Documentation is awesome; AnalysIR has great support when you need it. The software, specifically for LearnIR, is very easy to use. If you found AnalysIR to be hard (or easy) you'll pick up LearnIR fast. It's not so much a 'stripped down' version, but rather a version geared towards LearnIR's purpose. LearnIR works equally well with both softwares, having used AnalysIR for years now, I found LearnIR (software) to be very easy to use, and more than adequate for day to day use. If you find LearnIR's software lacking in anyway, try AnalysIR -- but I wouldn't jump into AnalysIR unless you need it.
While you could definitely embed this in your end-project; I plan on using it for speeding up prototyping and to sort of remove a some human error. It is well built and documented. Looking forward to ReceiveIR. Shipping to USA was fast.
Response from IR AnalysIR-Infrared decoder & anlayzer OCXO 10Mhz | Sept. 18, 2017
Many thanks for the kind words...
FYI: "ReceiveIR" is already available....but called "DetectIR" and can be configured with many IR receiver options. (Unfortunately, it is currently only listed on our own website. When I get some spare time I will also list on Tindie along with our wider range of IR modules)
There ia also another "RecieveIR" module available, called A.IR Shield Rx. This is a dedicated shield for AnalysIR and plugs directly into platforms such as UNO or breadboards. However it can also be used for other purposes and features both a standard IR receiver & IR Learner in one very compact module. Allows signal recording & Carrier frequency measurement. Again only available via our website.
I reallly must get more of these IR modules listed on Tindie.....
The board arrived well packed and in good time. On inspection the board was well layed out and well produced with many options available for hacking. Good communications and documentation. Wish I had found this earlier. A1*
I purchased the 4 hour calibrated fully built system. Electronically, it worked perfectly. However the mounting holes on the revision of the board I bought (Rev C?) are too close to components - in one case the machine bolt head inserted into the hole touched a capacitor and in another case, I couldn't get a bolt head with washer inserted in the hole because the trimming pot blocked it.
I communicated this to the supplier and the engineer who responded said this should be easy to fix in the next board revision. The response was timely, professional and the engineer obviously knew what he was talking about. [NB: I rated the product as good, but the rating of the other characteristics is not correct, since on my browser clicking on any star of the 5 generated an "Amazing" 5 star rating. For the record, I would rate shipping as good, documentation as average and communication as good. I tried to leave them unrated, but the evaluation process required that I rate everything.]
Response from IR AnalysIR-Infrared decoder & anlayzer OCXO 10Mhz | Oct. 11, 2016
Thanks for the feedback - much appreciated and as you mentioned we will feed that back into the next rev of the board.
Some additional comments: - Mounts: are fine in the current Rev with the correct size screw head, but we will create more space near the mounts in the next Rev. Of course with Plastic/nylon mounts even larger heads could be used. Snap through plastic mounts are also fine. - Documentation: After follow-up, it seems the information/documentation you needed was already provided on the Main Tindie page for this product. However, in future we will also include the links to the OCXO datasheets in the information pack we email after shipping the product. (The Info pack we issue includes 6 documents - Schematic(s), BoM, Component Placement & Layout, OCXO footprint & dimensions and now a copy of the Links to available datasheets of the OCXOs we provide)
I picked up two of these. One I left as is. The other I have converted to an 80 MHz clock by adding a couple of clock multiplier ICs to the back of the unit. The extra pads on the back are great for this purpose. I will be rebuilding this unit as a 50 MHz clock by taking advantage of the harmonics on the square wave output and applying a bandpass filter at the fifth harmonic.
I checked the 10 MHz output of two units against each other using an oscilloscope. They seem to be within about 1/5 Hz of each other, so I'm quite pleased with the calibration. Frequency stability seems excellent. I had the opportunity to use one of these units outdoors on a cool day, and although it took a little longer to warm up, once the oven came up to temperature the frequency was bang on.
Response from IR AnalysIR-Infrared decoder & anlayzer OCXO 10Mhz | April 11, 2016
Thanks for the update...I am particularly pleased you found a novel use for the extra footprints on the back of the PCB...I had primarily envisaged frequency dividers, so the frequency multiplier application is extra cool!
I bought 2 sets of pushwheels (7 pc. each) from here: --> https://www.tindie.com/products/AnalysIR/resistance-decade-substitution-box-kit/ I'm quite satisfied with these: after fiddeling out how to solder my own precision resistors onto it (got great help from the seller), everything works well. Looking forward to build them into an enclosure, but didn't find the right yet...
This is an excellent and inexpensive way to provide yourself with a solid 10Mhz frequency standard. I got the board populated with all the parts less the OCXO which I got from Ebay. I bought the ISOTEMP OCXO 131-100 with a date code of 2004 . Aside from the fact that the Ebay seller mislabled the pinouts on the ocxo, It worked right off the bat once I checked the spec sheet. Clever product, well made and it did the job for me.