FS: used SRS PRS10 Rubidium Oscillator, with accessory install kit and heat sink - Page 1
Forum section: electronics / general

author: testpoint1
author_rank: Frequent Contributor
timestamp: May 12, 2019, 05:55:05 pm
content: 189 USD,https://www.ebay.com/itm/173901102767used SRS PRS10 Rubidium Oscillator, with accessory install kit and heat sinkPRS10 exists 1pps input, use GPS as disciplined clock, so no need to calibrate it;he accessory include: PCB, 7805 IC, DB9 connector, special connector, LED, wires etc.

author: Mr. Scram
author_rank: Super Contributor
timestamp: May 12, 2019, 06:45:26 pm
content: What's the difference between this and your other offerings? I'm a bit confused.

author: Bicurico
author_rank: Super Contributor
timestamp: May 12, 2019, 06:56:43 pm
content: I think it is the fact that this one is a different brand (Stanford Research) and it comes with a heatsink pre-mounted.But otherwise, I am curious myself...

author: jpb
author_rank: Super Contributor
timestamp: May 12, 2019, 08:34:08 pm
content: The SRS PRS10 has an OCXO in it so is low phase noise (most Rubidiums just have a standard 10MHz or 20MHz crystal) and also has the option of being disciplined by a 1pps input from a GPS without having to setup an external GPSDO arrangement.https://www.thinksrs.com/products/prs10.htmlAlso look at this thread:https://www.eevblog.com/forum/metrology/using-gps-1pps-to-steer-prs-10/

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 12, 2019, 09:27:35 pm
content: PRS10 vs LPRO-101, for anyone who wonder...http://www.ke5fx.com/rb.htm

author: testpoint1
author_rank: Frequent Contributor
timestamp: May 13, 2019, 02:26:10 am
content: Quote from: Mr. Scram on May 12, 2019, 06:45:26 pmdiff is PRS10 is rare, and has "1PPS in" feature, then price will be high

author: testpoint1
author_rank: Frequent Contributor
timestamp: May 13, 2019, 02:34:58 am
content: Quote from: jpb on May 12, 2019, 08:34:08 pmOCXO is NOT a smart design for the Rubidium box, actually the box is a big OCXO (several sensor to control the rubidium heating system), LPRO 101 use SC cut crystal, BTW, OCXO's stability time is longer than normal VCXO.

author: testpoint1
author_rank: Frequent Contributor
timestamp: May 13, 2019, 02:39:33 am
content: Quote from: Mechatrommer on May 12, 2019, 09:27:35 pmthere is no mean for the comparison since what they got was different used kit, maybe LPRO is 10 years old, PRS10 is 1 year old (it has new), actually LPRO design is for 10 year's life, some of the components (at least 3, not include lamp) life is end, you must replace the components then can test it.

author: jpb
author_rank: Super Contributor
timestamp: May 13, 2019, 02:12:01 pm
content: Quote from: testpoint1 on May 13, 2019, 02:34:58 amThough you're right that Rubidium oscillators keep the physics unit at a constant (or near constant) temperature and on the units I have this is also used for the crystal oscillator (a 20MHz crystal that is thermally attached to the metal of the physics unit) this does not mean that it is the optimal temperature for an SC cut crystal. An OCXO maintains its internal crystal at a turning point temperature where the change of frequency with temperature is at a minimum - this is probably a different temperature from that the Rubidium cell is maintained at.So the PRS10 having an internal OCXO should give it an advantage but there are a lot of other factors at play.

author: testpoint1
author_rank: Frequent Contributor
timestamp: May 13, 2019, 02:46:42 pm
content: Quote from: jpb on May 13, 2019, 02:12:01 pmActually, all the Rubidium Oscillator will be locked until the lamp and cell temperature are fixed, for the LPRO and FEI clock, will continue do frequency scan, for the spectratime SRO-100, no scan till temperature reached. you can tear down a OCXO, you will find what is inside.

author: citizenrich
author_rank: Newbie
timestamp: June 12, 2019, 12:07:00 am
content: Thanks @testpoint1. I bought the aforementioned SRS PRS10 and hooked it up tonight and it's looking great.Obligatory Lady Heather screencap attached.

author: testpoint1
author_rank: Frequent Contributor
timestamp: June 12, 2019, 12:17:01 pm
content: Quote from: citizenrich on June 12, 2019, 12:07:00 amgreat, I will list the remain one PRS10 soon, I designed a beautiful board with Ublox LEA module, PRS10 can be trained by GPS (not only GPS, also can be Galineo PHM clock).

author: syau
author_rank: Frequent Contributor
timestamp: June 13, 2019, 12:03:13 am
content: Quote from: testpoint1 on June 12, 2019, 12:17:01 pmlooking forward for it

author: Mr. Scram
author_rank: Super Contributor
timestamp: June 13, 2019, 03:16:58 pm
content: Quote from: syau on June 13, 2019, 12:03:13 amYeah, me too.