[time-nuts] Efratom LPRO Rubidium

I have one of the Lucent RFTGm-II-Rb Rubidium cell site standards. It's misbehaving. Knowing the amount of experience on this list, I figured I'd ask before I dive in much deeper where I have no schematics. Initially I believed one of the DC-DC converters was not working after warmup. But after re

Re: [time-nuts] Lucent RFTG-m-XO 15MHz -> 10MHz

I've done three 15 MHz to 10 MHz conversions now, an RFTGm-II-Rb, RFTG-m-XO, and an RFTGm-II-XO. So I'll mention the quick and dirty mod that worked. The circuit boards are virtually identical between all three. I pulled the 15 MHz metal cased filter out. Backtrack from the +23dBm 15 MHz output, t

Re: [time-nuts] Racal-Dana 1992 switches

luth, GA - Original Message - From: "Bill Hawkins" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" Sent: Friday, March 28, 2008 9:09 PM Subject: Re: [time-nuts] Racal-Dana 1992 switches Charles S. Osborne said, in p

Re: [time-nuts] Racal-Dana 1992 switches

Matt, Not seeing a better alternative posted for the Racal 1992, and having dozens of similar bad Toko switches on some Pacific Measurements 1038-N10 Scalar Analyzers, I decided to buy a bunch of the Jameco ones and give it a try. Definitely not a form fit replacement. But if you're not too asthe

Re: [time-nuts] Wanted to buy or borrow -- RFTG-m-XO L106A

John, I have my RFTGm-II-XO (L109) open on the workbench (I'm changing the 15MHz output to 10 MHz) and tried the sequence you mentioned below. Mine reacts similarly. However, if you reapply a 10 MHz external source to the "10 MHz REF In" sma it locks after maybe 15 minutes and XO frequency stabili

Re: [time-nuts] LUCENT RFTG-m-RB

I'll try to get the pinout off mine when I get home and post it. Charles S. Osborne Technical Director Pisgah Astronomical Research Institute 1 PARI Drive, HC 73, Box 638 Rosman, NC 28772-9614 http://www.pari.edu 828-862-5813 direct 828-862-5554 main 828-862-5877 FAX [EMAIL PROT

Re: [time-nuts] PC clock comparison software?

stic code would help troubleshoot that since I could see which branches failed when, and if they recover. Network loading is minimal except from the main website server to the Internet via T1 ( soon OC3, then that will be minimally loaded too except during distance learning and video conferencing).

[time-nuts] PC clock comparison software?

ith 100mbps ethernet network branches. In the near future some video conferencing and remote telescope users will add to the chunkiness of the network variable load. Thoughts on my test software delemma? Thanks, 73, Charles S. Osborne, K4CSO Technical Director Pisgah Astronomical Research Inst

Re: [time-nuts] GPS receiver replacements for UT+

n the Smithsonian museum in Washington. That's when you know your technology is becoming dated. Hi! Thanks, Charles S. Osborne Technical Director Pisgah Astronomical Research Institute 1 PARI Drive, HC 73, Box 638 Rosman, NC 28772-9614 http://www.pari.edu 828-862-5813 direct 828-862-5554 main 82

[time-nuts] GPS receiver replacements for UT+

s has come up before, I must have missed it. Frequent lightning storms in summer keeps me in the hunt for these boards. Even with lightning protection on the coaxes the EMP still gets a few every year. Thanks, Charles S. Osborne Technical Director Pisgah Astronomical Research Institute 1 PARI Dr

Re: [time-nuts] Unknown Efratom 10MHz Assy, information asked

e Rb side would fail back over to the OCXO side. Does anyone have a pinout for the RS422/1PPS or Interface dB15 connectors on this type unit? And is there any software out there which will look into the lock status/control similar to GPSCon does with the Z3801A/Z3816As? Thanks, Charles S. Osbo

[time-nuts] Lucent GPS "RFTGm-II-Rb"

ing on some of the ports. But without more info I'm proceeding with caution and somewhat at a standstill as to what's going on. Anyone have any experience with these units? Thanks, Charles S. Osborne, K4CSO Technical Director Pisgah Astronomical Research Institute 1 PARI Drive, HC 73,