Products > Test Equipment
HP 5316A Teardown and Frequency Standard
hvontres:
A few things to keep in mind:
1) If you don't need GPIB, a 5315B will have the same features. In fact, the main microcontroller used is the same mask from part. The oscilator mod works on both.
2) The OXCO mod is well worth it if you can't find one with the factory option
3) If possible, I would look for a unit that has the third channel installed. That will allow you to go up to about 1.2 Ghz or so.
AMR Labs:
--- Quote from: hvontres on January 05, 2024, 05:11:31 pm ---A few things to keep in mind:
1) If you don't need GPIB, a 5315B will have the same features. In fact, the main microcontroller used is the same mask from part. The oscilator mod works on both.
2) The OXCO mod is well worth it if you can't find one with the factory option
3) If possible, I would look for a unit that has the third channel installed. That will allow you to go up to about 1.2 Ghz or so.
--- End quote ---
Yes, ideally looking for installed options 003 and 004, although I have other counter for higher frequencies so C-Channel would be nice to get but not indispensable. My main goal is having something that will count low Hz frequencies without the typical 10 second gate time. And that OCXO board shown earlier in this thread seems easy enough to build if missing.
5315 and 5316 model form factor is very similar to 3468 and 3478 DMMs. BTW still looking for a handle for my 3468A.
bdunham7:
--- Quote from: AMR Labs on January 05, 2024, 04:21:54 pm ---Thanks guys, then indeed I was looking at the correct model. Its a pain having to wait 10 seconds before getting a low Hz reading with my current counter, specially when trying to make fine adjustments to a 60Hz oscillator.
--- End quote ---
What is your current counter? If it is not reciprocal, then even with a 10-second gate you will only have 1 decimal point, 60.0Hz?
AMR Labs:
--- Quote from: bdunham7 on January 05, 2024, 06:47:08 pm ---What is your current counter? If it is not reciprocal, then even with a 10-second gate you will only have 1 decimal point, 60.0Hz?
--- End quote ---
Exactly, I just get one decimal. That is why I would like a reciprocal counter.
I still can get 5 decimal places like 60.00000Hz with the build-in CTT option of my 2465B, but for this application I would rather need a dedicated separate counter like the HP5315/16.
As a GP counter I use the Optoelectronics 8010a up to 1.1Ghz that came with the OCXO option. Also have an Audio Frequency Meter build into the COM-120B with the lowest range being 0-200Hz but it also defaults to only 60.0 with just one decimal as at the lower end is rather meant to mostly count low frequency signaling tones like CTCSS, so one decimal resolution is more than enough for its intended application.
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