Some time ago my GPS receiver would not lock to GPS. I put this down to the fact the antenna had got tilted over quite a bit, and since I was not needing the receiver, it got switched off, and I forgot about it for some time.
I've since straightened the antenna up, and push it a little higher - it is now about 3 m above ground However, the unit will not lock, despite being on for a couple of days. The status shows "attempting to lock", but does not actually lock one satellite. I set the and time manually, as well as latitude, longitude, and antenna height. I've also set the elevation mask to 10 degrees. The data below shows some results of :system:status? over a period of a little over two hours. I've run self-tests, and they all pass okay. The occasional error below, such as E-113, it just where I have mis-typed something. If I type *CLS, the display shows scpi> I'm a bit concerned if the mode of "hold" is correct, but I'm unsure. Has anyone got any suggestions as to what I can do to get it to lock? scpi > :system:sy E-113> :system:status? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ........................................... [ Outputs Invalid ] SmartClock Mode ___________________________ Reference Outputs _______________ Locked TFOM 9 FFOM 3 Recovery 1PPS TI -- Holdover HOLD THR 1.000 us >> Power-up: GPS acquisition Holdover Uncertainty ____________ Predict -- ACQUISITION .............................................. [ GPS 1PPS Invalid ] Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ PRN El Az PRN El Az UTC 17:53:34 [?] 13 Aug 2020 * 1 -- --- 7 39 159 GPS 1PPS Invalid: not tracking 2 46 286 * 8 -- --- ANT DLY 0 ns * 3 -- --- 9 77 72 Position ________________________ 4 37 64 *10 -- --- MODE Hold 5 17 292 *11 -- --- 6 54 214 *30 15 182 LAT N 51:39:04.128 LON E 0:46:36.375 ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK E-113> *CLS scpi > :system:status? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ........................................... [ Outputs Invalid ] SmartClock Mode ___________________________ Reference Outputs _______________ Locked TFOM 9 FFOM 3 Recovery 1PPS TI -- Holdover HOLD THR 1.000 us >> Power-up: GPS acquisition Holdover Uncertainty ____________ Predict -- ACQUISITION .............................................. [ GPS 1PPS Invalid ] Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ PRN El Az PRN El Az UTC 17:54:01 [?] 13 Aug 2020 * 1 -- --- 7 39 159 GPS 1PPS Invalid: not tracking 2 46 286 * 8 -- --- ANT DLY 0 ns * 3 -- --- 9 76 72 Position ________________________ 4 37 64 *10 -- --- MODE Hold 5 18 292 *11 -- --- 6 54 214 *30 15 182 LAT N 51:39:04.128 LON E 0:46:36.375 ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK scpi > :system:status? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ........................................... [ Outputs Invalid ] SmartClock Mode ___________________________ Reference Outputs _______________ Locked TFOM 9 FFOM 3 Recovery 1PPS TI -- Holdover HOLD THR 1.000 us >> Power-up: GPS acquisition Holdover Uncertainty ____________ Predict -- ACQUISITION .............................................. [ GPS 1PPS Invalid ] Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ PRN El Az PRN El Az UTC 18:00:50 [?] 13 Aug 2020 2 47 282 *11 -- --- GPS 1PPS Invalid: not tracking 4 34 64 *12 -- --- ANT DLY 0 ns 5 20 293 *13 -- --- Position ________________________ 6 51 210 *14 -- --- MODE Hold 7 42 158 *15 -- --- 9 73 70 *16 10 64 LAT N 51:39:04.128 LON E 0:46:36.375 ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK scpi > scpi > :system:status? E-113> ------------------------------- Receiver Status ------------------------------- E-121> E-121> SYNCHRONIZATION ........................................... [ Outputs Invalid ] E-113> SmartClock Mode ___________________________ Reference Outputs _______________ E-113> Locked TFOM 9 FFOM 3 E-113> Recovery 1PPS TI -- E-113> Holdover HOLD THR 1.000 us E-113> >> Power-up: GPS acquisition Holdover Uncertainty ____________ E-101> Predict -- E-113> E-113> ACQUISITION .............................................. [ GPS 1PPS Invalid ] E-113> Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ E-113> PRN El Az PRN El Az UTC 18:00:50 [?] 13 Aug 2020 E-113> 2 47 282 *11 -- --- GPS 1PPS Invalid: not tracking E-103> 4 34 64 *12 -- --- ANT DLY 0 ns E-103> 5 20 293 *13 -- --- Position ________________________ E-103> 6 51 210 *14 -- --- MODE Hold E-103> 7 42 158 *15 -- --- E-103> 9 73 70 *16 10 64 LAT N 51:39:04.128 E-103> LON E 0:46:36.375 E-113> ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) E-113> HEALTH MONITOR ......................................................... [ OK ] E-113> Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK E-113> scpi > E-113> scpi > :system:status? E-113> ------------------------------- Receiver Status ------------------------------- E-121> E-121> SYNCHRONIZATION ........................................... [ Outputs Invalid ] E-113> SmartClock Mode ___________________________ Reference Outputs _______________ E-113> Locked TFOM 9 FFOM 3 E-113> Recovery 1PPS TI -- E-113> Holdover HOLD THR 1.000 us E-350> >> Power-up: GPS acquisition Holdover Uncertainty ____________ E-101> Predict -- E-113> E-113> ACQUISITION .............................................. [ GPS 1PPS Invalid ] E-113> Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ E-113> PRN El Az PRN El Az UTC 18:00:50 [?] 13 Aug 2020 E-113> 2 47 282 *11 -- --- GPS 1PPS Invalid: not tracking E-103> 4 34 64 *12 -- --- ANT DLY 0 ns E-103> 5 20 293 *13 -- --- Position ________________________ E-103> 6 51 210 *14 -- --- MODE Hold E-103> 7 42 158 *15 -- --- E-103> 9 73 70 *16 10 64 LAT N 51:39:04.128 E-103> LON E 0:46:36.375 E-113> ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) E-113> HEALTH MONITOR ......................................................... [ OK ] E-113> Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK E-113> scpi > E-113> :system:status? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ........................................... [ Outputs Invalid ] SmartClock Mode ___________________________ Reference Outputs _______________ Locked TFOM 9 FFOM 3 Recovery 1PPS TI -- Holdover HOLD THR 1.000 us >> Power-up: GPS acquisition Holdover Uncertainty ____________ Predict -- ACQUISITION .............................................. [ GPS 1PPS Invalid ] Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ PRN El Az PRN El Az UTC 19:43:25 [?] 13 Aug 2020 2 27 228 *26 -- --- GPS 1PPS Invalid: not tracking 5 63 284 *27 -- --- ANT DLY 0 ns 7 62 81 *28 -- --- Position ________________________ 9 29 83 *29 -- --- MODE Hold 13 29 262 30 65 165 *25 -- --- *31 -- --- LAT N 51:39:04.128 LON E 0:46:36.375 ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK E-113> ? E-103> *CLS scpi > :system:status? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ........................................... [ Outputs Invalid ] SmartClock Mode ___________________________ Reference Outputs _______________ Locked TFOM 9 FFOM 3 Recovery 1PPS TI -- Holdover HOLD THR 1.000 us >> Power-up: GPS acquisition Holdover Uncertainty ____________ Predict -- ACQUISITION .............................................. [ GPS 1PPS Invalid ] Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ PRN El Az PRN El Az UTC 19:56:10 [?] 13 Aug 2020 * 1 -- --- 7 58 72 GPS 1PPS Invalid: not tracking 2 22 224 * 8 -- --- ANT DLY 0 ns * 3 -- --- 9 24 86 Position ________________________ * 4 -- --- *10 -- --- MODE Hold 5 68 273 13 34 265 * 6 -- --- 30 69 155 LAT N 51:39:04.128 LON E 0:46:36.375 ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK scpi > :system:status? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ........................................... [ Outputs Invalid ] SmartClock Mode ___________________________ Reference Outputs _______________ Locked TFOM 9 FFOM 3 Recovery 1PPS TI -- Holdover HOLD THR 1.000 us >> Power-up: GPS acquisition Holdover Uncertainty ____________ Predict -- ACQUISITION .............................................. [ GPS 1PPS Invalid ] Tracking: 0 ____ Not Tracking: 12 _______ Time ____________________________ PRN El Az PRN El Az UTC 20:02:13 [?] 13 Aug 2020 2 19 223 13 36 267 GPS 1PPS Invalid: not tracking 5 69 267 *14 -- --- ANT DLY 0 ns 7 56 69 *15 -- --- Position ________________________ 9 22 88 *16 -- --- MODE Hold *11 -- --- *17 -- --- *12 -- --- 30 71 148 LAT N 51:39:04.128 LON E 0:46:36.375 ELEV MASK 10 deg *attempting to track HGT +46.29 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK scpi > Dr David Kirkby Ph.D C.Eng MIET Email: drkir...@kirkbymicrowave.co.uk Web: https://www.kirkbymicrowave.co.uk/ Kirkby Microwave Ltd (Tel 01621-680100 / +44 1621-680100) Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.