time-nuts@lists.febo.com

Discussion of precise time and frequency measurement

View all threads

For Sale: Two time server appliance PCs with Ublox LEA-M8T GNSS

J
john@millerjs.org
Tue, May 14, 2024 3:21 PM

Hello All,
I have a couple of extra network time appliances that I built last year that I need to find new homes for. These are PC Engines apu2e0 systems with custom Ublox LEA-M8T miniPCIe cards. The LEA-M8T communicates with the system via USB for configuration and sending high-level data. The apu2 PC has two Intel i211AT network interfaces, both of which support PTP and have I/O for time pulses. Time pulses are sent from the M8T’s PPS output to SDP0 on eth0, but all four I/O pins on each NIC are accessible as test pads. PPS and the M8T’s second time pulse output are also broken out via SMA connectors on the machine.

Currently they are both running Alpine Linux (which is very well suited for this task) as well as gpsd, chrony, and linuxptp. I can leave them set up as-is (with DHCP enabled and a generic password) or blank out the SSDs for you to configure on your own. Power is provided by a standard 12v barrel jack, and I’ll include the original power supplies. They are very power efficient and consume less than 5w.

If there is interest in the LEA-M8T miniPCIe cards, I am open to making more of them as well, for use in other similar mini PCs - there are a few different models with Intel i210 NICs which support PPS input for PTP.

I’d like to sell them for $300 shipped, each, but I am open to offers.

If you’re interested or would like to know more, please contact me off-list at john@millerjs.org mailto:john@millerjs.org

Regards & 73s,
John
K1QLN



Hello All, I have a couple of extra network time appliances that I built last year that I need to find new homes for. These are PC Engines apu2e0 systems with custom Ublox LEA-M8T miniPCIe cards. The LEA-M8T communicates with the system via USB for configuration and sending high-level data. The apu2 PC has two Intel i211AT network interfaces, both of which support PTP and have I/O for time pulses. Time pulses are sent from the M8T’s PPS output to SDP0 on eth0, but all four I/O pins on each NIC are accessible as test pads. PPS and the M8T’s second time pulse output are also broken out via SMA connectors on the machine. Currently they are both running Alpine Linux (which is very well suited for this task) as well as gpsd, chrony, and linuxptp. I can leave them set up as-is (with DHCP enabled and a generic password) or blank out the SSDs for you to configure on your own. Power is provided by a standard 12v barrel jack, and I’ll include the original power supplies. They are very power efficient and consume less than 5w. If there is interest in the LEA-M8T miniPCIe cards, I am open to making more of them as well, for use in other similar mini PCs - there are a few different models with Intel i210 NICs which support PPS input for PTP. I’d like to sell them for $300 shipped, each, but I am open to offers. If you’re interested or would like to know more, please contact me off-list at john@millerjs.org <mailto:john@millerjs.org> Regards & 73s, John K1QLN