The Arduino Nano is 5Volt, the SI5351 is 3V3. So you should lower the voltage for the I2C interface by means of two resistors.
UCCM-P >SYST:STAT?
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57964-80 serial number 30798886 firmware ver 2.0.1.6-01 LINK mode
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Reference Status __________________________ Reference Outputs _______________
XX Ref 8KHz 0: [LOS]
XX Ref 8KHz 1: [LOS] TFOM 2 FFOM 3
XX Ref 8KHz 2: [LOS] UCCM A Status[ACTIVE]
XX Ref 8KHz 3: [LOS]
>> GPS: [phase:-1.1E-07, settling]
ACQUISITION ...................................................[GPS 1PPS Valid]
Tracking: 4 ____ Not Tracking: 4 ________ Time ____________________________
PRN El Az C/N PRN El Az GPS 02:52:24 28 Mar 2020
2 44 60 42 6 11 56
21 13 237 34 5 46 120 ANT DLY 0 ns
25 66 213 42 12 42 164 Position ________________________
29 57 294 32 31 21 300 MODE Hold
LAT N 49:16:3.485
LON W 123:04:21.643
HGT +12.98 m (MSL)
ELEV MASK 5 deg
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Command complete
UCCM-P >STATus
- UCCM Slot STATE-
1-1. #Now ACTIVE STATUS ---------------- [Master Manual]
1-2. #Before ACTIVE STATUS ------------- [OCXO Warm]
2-1. #Reference Clock Operation -------- [Not Used]
2-2. #Current Reference Type ----------- [GPS]
2-3. #Current Select Reference --------- [GPS 1PPS]
2-4. #Current Reference Status --------- [Good Accuracy & Stable]
#GPS STATUS ----------------------- [Available]
#Priority Level ------------------- [LINK > GPS]
#ALARM STATUS
#H/W FAIL [ LINK ]
#OPERATION ALARM ------------------ [LINK ]
3-1. #PLL STATUS ----------------------- [ENABLE]
3-2. #Current PLL MODE ----------------- [OFFSET OBSERVATION MODE]
Command complete
Did you check the board for physical impairments, components missing ?
If your sky view is still terrible, that may be the source of the problem.
Try providing an accurate antenna position manually. If you have bad visibility, the self-survey might not be able to compute a good position by itself.
QuoteTry providing an accurate antenna position manually. If you have bad visibility, the self-survey might not be able to compute a good position by itself.
This was the first thing I tried. I may try surveying position with a more sensitive u-blox receiver and inputting that position instead of just copying the self-survey parameters.
QuoteTry providing an accurate antenna position manually. If you have bad visibility, the self-survey might not be able to compute a good position by itself.
This was the first thing I tried. I may try surveying position with a more sensitive u-blox receiver and inputting that position instead of just copying the self-survey parameters.
That was not what I meant you to do. You need to input an accurate position. Just entering the position the receiver calculated by itself is useless. Are there no maps of your area? Even using Google Maps you can possibly pinpoint the antenna position with a sufficient precision.
You might check the ocxo pins. There should be a reference voltage on one pin (the middle of the 3) and a pin next to it on which there should be a voltage between 0 and Vref.
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57964-80 serial number 30798886 firmware ver 2.0.1.6-01 LINK mode
-------------------------------------------------------------------------------
Reference Status __________________________ Reference Outputs _______________
XX Ref 8KHz 0: [LOS]
XX Ref 8KHz 1: [LOS] TFOM 2 FFOM 3
XX Ref 8KHz 2: [LOS] UCCM A Status[ACTIVE]
XX Ref 8KHz 3: [LOS]
>> GPS: [phase:-1.8E-09, settling]
ACQUISITION ...................................................[GPS 1PPS Valid]
Tracking: 6 ____ Not Tracking: 3 ________ Time ____________________________
PRN El Az C/N PRN El Az GPS 22:48:03 29 Mar 2020
24 53 284 36 15 7 233
17 58 58 41 2 16 179 ANT DLY 0 ns
6 35 153 37 1 5 28 Position ________________________
12 25 285 34 MODE Hold
19 82 89 44
28 31 94 40 LAT N 49:16:8.355
LON W 123:04:25.279
HGT +10.70 m (MSL)
ELEV MASK 5 deg
-------------------------------------------------------------------------------
Command complete
UCCM-P >STATUS?
Command error
UCCM-P >STATUS
- UCCM Slot STATE-
1-1. #Now ACTIVE STATUS ---------------- [Master Manual]
1-2. #Before ACTIVE STATUS ------------- [OCXO Warm]
2-1. #Reference Clock Operation -------- [Not Used]
2-2. #Current Reference Type ----------- [GPS]
2-3. #Current Select Reference --------- [GPS 1PPS]
2-4. #Current Reference Status --------- [Good Accuracy & Stable]
#GPS STATUS ----------------------- [Available]
#Priority Level ------------------- [LINK > GPS]
#ALARM STATUS
#H/W FAIL [ LINK ]
#OPERATION ALARM ------------------ [LINK ]
3-1. #PLL STATUS ----------------------- [ENABLE]
3-2. #Current PLL MODE ----------------- [OFFSET OBSERVATION MODE]
Settling = you are still in the early part of the loop filter convergence process. The typical reason for this is poor GPS antenna location. Any other reason is "non-repairable".
The typical reason for this is poor GPS antenna location. Any other reason is "non-repairable".