Hide thumbs Also See for ZETA-G-UMTS:

Advertisement

Using a Siretta GNSS Modem to test the performance of a
This Application Note is designed for customers who are looking to test their GPS antenna
performance using a Siretta GNSS Modem.

Requirements

Siretta GNSS Modem such as the ZETA-G-UMTS or ZETA-G-GPRS (For this guide the
ZETA-G-GPRS was used - ZETA-G-UMTS)
ZETA Quick Start Guide (QSG) -
PC with Tera Term Version 4.96 (Tera Term can be downloaded from the following link -
Teraterm
Link). Teraterm is freeware.
PC with VisualGPSView (VisualGPSView is a free software application, it can be
downloaded from the following
RS232 to USB cable (it comes with the ZETA starter kit - Siretta Part Number: 60793).
GPS antenna to be tested (For this Guide the Mike 3A with SMA Male connector was
used -
Mike 3A

Procedure for testing GPS antenna performance

1. Connect ZETA-G-GPRS (or any other Siretta GNSS modem) Modem to the PC using USB to
RS232 cable supplied by Siretta.
2. Power on the Modem (refer to the modem Quick start guide)
3. Open TeraTerm window from the PC connected to the modem
4. Select Serial and you should see "Prolific-to-Serial com port" as shown below.
5. Open setup tab on the tera term then select serial port, you will be presented with the
screenshot below.
6. Enter the following parameters:
Bits per second: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: none
Siretta Limited - Enabling Industrial IoT
GPS Antenna
ZETA quick Start Guide
Visual GPS Link
Link)
https://www.siretta.com | +44 1189 769000 | sales@siretta.com
for Windows 7 to Window 10)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ZETA-G-UMTS and is the answer not in the manual?

Questions and answers

Summary of Contents for SIRETTA ZETA-G-UMTS

  • Page 1 Visual GPS Link for Windows 7 to Window 10) RS232 to USB cable (it comes with the ZETA starter kit - Siretta Part Number: 60793). GPS antenna to be tested (For this Guide the Mike 3A with SMA Male connector was...
  • Page 2 AT$GPSP=1 (You will receive OK) //Turn on NMEA data stream AT$GPSNMUN=3,1,1,1,1,1,1 (You will receive CONNECT) After this command the NMEA GPS data strings will appear as shown below. Siretta Limited - Enabling Industrial IoT https://www.siretta.com | +44 1189 769000 | sales@siretta.com...
  • Page 3 9. Click file tab on the Tera Term window, select disconnect as seen below. Siretta Limited - Enabling Industrial IoT https://www.siretta.com | +44 1189 769000 | sales@siretta.com...
  • Page 4 11. Navigate to the tool then select “Connect to GPS“ option as shown below. 12. Pop up screen below will appear, select com port 3 and enter the baud rate of 115200 then click OK. Siretta Limited - Enabling Industrial IoT https://www.siretta.com | +44 1189 769000 | sales@siretta.com...
  • Page 5 If comparing antennas, you should therefore always place the antennas under test in exactly the same location every time to ensure a fair comparison Excellent Performance Figure 1 Siretta Limited - Enabling Industrial IoT https://www.siretta.com | +44 1189 769000 | sales@siretta.com...
  • Page 6 Disconnect the GPS antenna (for this guide Mike 3A) from the modem GPS connector then click “Front Panel Status” from the VisualGPSView where you will be presented with below results which show poor performance. Poor Performance Figure 2 Siretta Limited - Enabling Industrial IoT https://www.siretta.com | +44 1189 769000 | sales@siretta.com...
  • Page 7 Signal Quality/SNR Window - Monitor satellite signal to noise ratios and see them graphically on the screen. The signal quality window will grow or shrink to accommodate number of satellites in view More information about modems can be found from https://www.siretta.com/products/industrial- modems/ More information about GPS and GNSS antennas can be found from https://www.siretta.com/products/antennas/antenna-selector/...

This manual is also suitable for:

Zeta-g-gprs

Table of Contents