Re: [time-nuts] Toggle switch wiring for RFTGm-II (KS24019)

I do believe that documentation is for the L102/L102A and L104/L104A/L104B units. The last units on eBay are L108/L109 and so a later generation of the KS24019 family. Basically the RFTG vs. the RFTGm-II. In another Lucent doc it can be seen that the toggle switch is on the frame for the older

Re: [time-nuts] Toggle switch wiring for RFTGm-II (KS24019)

-Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Alexander Huemer Sent: 28 June 2017 21:46 To: time-nuts@febo.com Subject: Re: [time-nuts] Toggle switch wiring

Re: [time-nuts] Toggle switch wiring for RFTGm-II (KS24019)

Hi! On Wed, Jun 28, 2017 at 04:17:20PM +0100, David C. Partridge wrote: > The Lucent manual refers to a toggle switch in the frame to switch the > active module in the RFTGm-II (KS24019) from the Rb to the XO. Unfortunately I cannot answer your question. I have one myself though. You are

Re: [time-nuts] Noise contribution of PLL on measuring phase noise

Hi Your op-amp noise is either 1/f sloped or flat spectrally. The EFC transfer function has a 1/f slope due to FM to PM conversion (you modulate FM and you look at PM). The noise out of the amp will roll off pretty fast. The gotcha is that your oscillator noise may also be rolling of pretty

Re: [time-nuts] Noise contribution of PLL on measuring phase noise

Hi, The PLL acts like a combined lowpass and highpass filter. Noise in the loop is high-pass filtered, thus, the further down from the loop bandwidth, the better suppression of the noise. Noise on the reference input is low-pass filtered, so that it passes through DC and a bit more, but high

Re: [time-nuts] Noise contribution of PLL on measuring phase noise

Thank you Bob. I was thinking of the contribution outside the loop, as for most part my PLL loops are around 1Hz and resolving closer than 10Hz isn't easy with a analyzer that stops at 10Hz. I guess what I'm asking is: should I take any care in the unity gain buffers or would any normal garden

Re: [time-nuts] Noise contribution of PLL on measuring phase noise

Hi Ok, let’s back up a bit: There are two basic regions when measuring a phase locked oscillator. You can be “inside” the loop bandwidth or “outside”. Yes it’s a bit more complex than that, but go with the idea for now. Inside the bandwidth, everything about the PLL can / may matter. It can

[time-nuts] Toggle switch wiring for RFTGm-II (KS24019)

The Lucent manual refers to a toggle switch in the frame to switch the active module in the RFTGm-II (KS24019) from the Rb to the XO. I have the complete shelf with both units and currently the Rb is the active module, and the XO is standby; but sadly there's no switch on the shelf itself. Does

[time-nuts] Noise contribution of PLL on measuring phase noise

Hi. When measuring Phase Noise using PLL, what noise would be contribuded from the PLL into the amplifier? Lets say we disconnect the control voltage from the oscillator, shouldn't the input stage of the PLL contribute some, altough miniscule part to the total noise seen? Would this noise be