Re: [time-nuts] LMU300 Connectors

w1...@outlook.com said: > I would have expected a sticker somewhere, but nothing found. I'll hit it > with 28vdc and see if any "Magic Smoke" issues forth. The kind of DC-DC converter I'm talking about is often called a brick. That's a standard size, roughly 2x2x1/2 inches. The older ones

[time-nuts] LMU300 Connectors

The standard config for telecom equipment that runs on +24V or -48V is that they have an isolated input DC-DC converter in them. The input voltage goes through a full bridge rectifier that makes them insensitive to input voltage polarity. On the ones that I have played with they worked fine

Re: [time-nuts] Examples of noise processes

Folks, Please be careful about definitions in this discussion. To some people, "phase noise" refers to sideband noise, away from the carrier, arising from some form of random phase modulation of the carrier. To others, the same term refers to the underlying phase modulation itself. While

[time-nuts] LMU300 Connectors

The power supply is auto sensing and spec'd at +24V or -48V, which implies the polarity would be the same in either case, but the auto sensing doesn't seem to imply sensing right across that range. 24 V range is 22 to 28 V at 6A, -48V range is -40.5 to -57V at 3A, I don't recall checking what

Re: [time-nuts] LMU300 Connectors

Don't worry, the sticker says : 24V 6A or 48V 3A. It means it's a switched mode power supply. -Original Message- From: time-nuts On Behalf Of Richard Solomon Sent: Friday, 15 March 2019 17:11 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] LMU300

Re: [time-nuts] Examples of noise processes

Did someone say "noise processes"? :-) On Fri, 15 Mar 2019 10:03:11 -0400 John Ackermann N8UR wrote: > For a presentation on basic time-nuttery, I'd like to find > non-oscillator examples of the various noise processes -- white PM, > flicker PM, white FM, flicker FM, random walk. (I'm not

Re: [time-nuts] LMU300 Connectors

I would have expected a sticker somewhere, but nothing found. I'll hit it with 28vdc and see if any "Magic Smoke" issues forth. 73, Dick, W1KSZ Sent from Outlook From: time-nuts on behalf of Hal Murray Sent: Thursday, March 14, 2019

Re: [time-nuts] Examples of noise processes

On 3/15/19 7:03 AM, John Ackermann N8UR wrote: Hi -- For a presentation on basic time-nuttery, I'd like to find non-oscillator examples of the various noise processes -- white PM, flicker PM, white FM, flicker FM, random walk.  (I'm not sure if FM and PM have any relevance outside

[time-nuts] TICC availability

Hi All -- I just found out that the last two TICCs from the second manufacturing run have been sold, so TAPR is now out of stock. We are willing to do another run, but frankly our checkbook can't handle the up-front cost when sales velocity has slowed and we don't know how long it might

[time-nuts] Examples of noise processes

Hi -- For a presentation on basic time-nuttery, I'd like to find non-oscillator examples of the various noise processes -- white PM, flicker PM, white FM, flicker FM, random walk. (I'm not sure if FM and PM have any relevance outside oscillators, though.) The idea is to make the noise

Re: [time-nuts] LMU300 Connectors

> The outside of the box specs current need at 24vdc and 48vdc. Does the Power > Supply recognize the voltage level or do I need to dig into it further ? There is a large collection of DC-DC converters available. A 2:1 range on the input voltage is common, but they usually are centered on