[time-nuts] HP 58503A GPS receiver not locking to GPS
Eric Garner
garnere at gmail.com
Fri Aug 14 01:11:41 UTC 2020
Have you manually set the date/time yet?
Last time I powered mine up. I had to update the current time and date and
it locked right up.
-Eric
On Thu, Aug 13, 2020, 1:55 PM Dr. David Kirkby <
drkirkby at kirkbymicrowave.co.uk> wrote:
> 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: drkirkby at 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.
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