Example Packet: 10 8F AE 01 00 00 09 00 02 00 00 00 41 00 01 F4 00 5A 00 00 3D AE 81 20 3B F2 14 BD 10 03
Packet Breakdown: 10 8F AE 01 00 00 09 = LED Status 5 LED's on front panel Yellow Red Green Locked Holdover 01 Yellow 02 Red 03 Yellow, Red 04 Green 05 Yellow, Green 06 Red, Green 07 Yellow, Red, Green 08 Locked 09 Yellow, Locked 11 Yellow, Holdover 12 Red, Holdover 13 Yellow, Red, Holdover 14 Green, Holdover 15 Yellow, Green, Holdover 16 Red, Green, Holdover 17 Yellow, Green, Holdover 18 Locked, Holdover 19 Yellow, Locked, Holdover 00 = Frequency FOM 00 Stable 01 Stabilizing 02 Unlocked/Holdover 03 Unlocked/Power-up 02 = Time FOM 00 <1 ns 01 1ns to 10ns 02 10ns to 100ns 03 100ns to 1µs 04 1µs to 10 µs 05 10 µs to 100 µs 06 100 µs to 1 ms 07 1 ms to 10 ms 8 10 ms to 100 ms 09 >100 ms 00 = Holdover Reason 00 Not In Holdover 01 No GPS Data 02 GPS Data Invalid 03 TRAIM Reject 04 Manual Holdover 05 In Recovery 06 Antenna Fault 07 00 = 16X PLL Lock 00 Locked 01 Unlocked 00 = Mode 00 Normal 01 Power Up 02 Auto Holdover 03 manual Holdover 04 Recovery 05 Fast Recovery 06 Disabled 07 5 Minute Recovery 08 Free Run 09 Firmware Restart 41 = Flash Device in use 41 A 42 B 43 C 44 D 45 E 46 F 00 01 F4 00 5A 00 00 3D AE 81 20 3B F2 14 BD 10 03 Which looks to be the TSIP version of the SCPI Time Code Query. Time Code Query This command returns the timecode message 980ms to 20ms (inclusive) prior to the next Even_Second of indicated time. An example of the response is: T1#H20AF16AC41+00B4 * T1 = Format identifier. * #H = Number representation identifier. * 20AF16AC = GPS time in seconds of the next 1 PPS on-time edge. The 1 PPS edge being referenced is the internal 1 PPS used by the GPSTM and does not appear as an output from the GPSTM. (If two requests for the time of day query occur one second apart, one response will be associated with both the internal 1 PPS and the external Even_Second, while the other response will only be associated with the internal 1 PPS signal.) * 4 = Time figure of merit (TFOM). * 1 = Frequency figure of merit (FFOM). * + = Leap second information. A "+" sign indicates a pending GPS leap second, while a "0" to indicate no pending GPS leap second. * 0 = Alarm indication. * 0 = Service request. * B4 = Checksum. The format of GPS time is a 32-bit integer represented in HEX. The TFOM message is defined as the integer part of 10*log(time error in ns); * 0 <1 ns * 1 1ns to 10ns * 2 10ns to 100ns * 3 100ns to 1µs * 4 1µs to 10 µs * 5 10 µs to 100 µs * 6 100 µs to 1 ms * 7 1 ms to 10 ms * 8 10 ms to 100 ms * 9 >100 ms //Sam. ----- Original Message ----- From: Mark Sims [mailto:[email protected]] To: [email protected] Sent: Mon, 07 May 2012 12:22:05 +1000 Subject: [time-nuts] NTGS55A Undocumented TSIP data > > The Nortel NTGS55A receivers output an undocumented 8F-AE data packet every > second. The Palisade receivers also output an 8F-AE packet, but it is > totally different. The last 8 bytes appear to be two 32-bit floating point > numbers that change every packet. One of the numbers appears to occasionally > track the PPS error value. The rest of the packet looks like static data > values. Does anybody have any info on the Nortrel 8F-AE packet? > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
