# FAQ Software

## ADU-07e GPS FIRMWARE UPDATE 2019 II

**week number rollover**

**Statement** from the successor of the GPS module:  
... Since this product had gone end of life five years ago, the organization that was supporting it in Ireland was not longer providing support. ...

*The ADU-07e will not work during the days 06 - 13 April 2019*

*Likely the ADU-07e continues to work with date 14 April 1999* on 14th April - unsure and not known if the leap seconds are counted correctly.

We will prepare a new firmware a.s.a.p. But you must open the ADU-07e and do some manual interaction (soldering a protection bridge - flashing and - enable the bridge again).

Hence that metronix **pulled** that request (informed by one of the ADU users) - the GPS manufacturer did not sent any not to us in advance.

**The firmware update for the GPS board is ready:**  
[ADU-07eGPS 2019 II](https://cloud.geo-metronix.de/s/AsgBm9S4MYMoEfA)  
and follow ->GPS_FIRMWARE_2019

**READ the APPLXXX_UpdateGPSBoardFW_en_0.1.pdf the GPS_FIRMWARE_2019 folder FIRST**

**Hence that after having installed the GPS update, the system either stop at selftest step 2 (short / long fast selftest active) or at step 52 (unified selftest).**  
**Now you have to WAIT until G3fix appears on the front panel (that may take up to 15-20 min in worst case).**  
**Then REBOOT and the system comes up as usual.**

The version of your actual system software is shown on the lower left in the web interface

![MCP Version](../../media/adu_webinterface/mcp_version.png)

The **ADU-8e** is NOT affected  
The new **Revision II GPS** (which is derived from the ADU-08e) is not affected. Only a few users have explicitly bought this GPS for ADU-07e

### Liability Question

metronix does not take over any liabilities for malfunctioning of systems or sensors.  
This has been already mentioned during the sales under "terms and conditions".  
As a quality manufacturer we do everything to ensure that you get best functionality and reliability with our instruments and sensors.  
In this actual case the GPS module manufacturer made a firmware which did not cover the 10bit week number rollover.  
After coming to know that a new firmware has to be changed we informed all clients world wide immediately.

## ADU-07e SYSTEM FIRMWARE UPDATE 2019 in April

We uploaded version 6. With version 6 for ADU-07e you will be able to use you android *mobile phone* for operating the system.  
Hence that version 6 requires always an external WiFi dongle.  
Version 6 will harmonize with the new ADU0-8e.

## GPS Synchronization

The GPS board is essential for the system.  
It not only delivers time and position is also **drives the recording frequencies**.  
In other words: if you want exactly 4096 samples/second the GPS needs G4Fix!  
All other GPS states do not guarantee frequency and timing precision, especially need for remote referencing.

| CPU | Freq Gen | GPS | Comments |
|-----|----------|-----|----------|
| synced 1st | synced 1st | 1 sat | syncs system 1st time; 1 pps not precise |
| | | ... no change? | no further sync; 1 pps not precise |
| synced 2nd | synced 2nd | 4 stats and more | sync epoch, 1 pps linked to GPS |
| | precise | G4Fix | sync epoch, 1 pps linked to GPS |
| | precise | G4Fix, continued | 1 pps linked to GPS |
| | not precise | G4Fix lost | 1 pps linked to internal clock during recording |
| | | G4Fix recovered | continues with actual date and time information during break |
| | | G4Fix recovered | sync all boards |

Understand: Time can not "jump" during recording is active. That would lead to corrupted timeseries.
If the GPS is already locked again it will immediately sync all board during recording break.

### Summary

As long you have G4Fix you do not need to care about anything.  
For the ADU-08e with its new powerfull GPS this should always possible.  
**For ADU-07e users we do have a clock/gps module II, derived from ADU-08e, available.**  
It costs 420 EUR - worth only for users who are facing frequently reception problems.