GNSS Frequency Guide

This is a preview of the LabSat 3 Wideband's integral web server which has been designed to easily setup your GNSS testing program. The GNSS Frequency Guide can also be used separately as a GNSS frequency selection tool or a look-up chart for GNSS signal location.

Just select your bandwidth requirement, select your required frequencies and see available quantisation levels.

 
SELECT SIGNAL DISPLAY
 
 
 
GPS
   
     Gallileo
   
     GLONASS
   
     BeiDou
   
     Other
   
Show individual signals

SELECT BANDWIDTH
10 MHz    30 MHz    56 MHz   

SELECT NUMBER OF SIGNAL BANDS
1 Band    2 Bands    3 Bands

SIGNAL QUANTIZATION
Current quantization:
&nbsp

CENTRE FREQUENCY
Move coloured bandwidth boxes in diagram above to change centre frequencies (press left mouse button and drag to left or right)
Band 1: 1575Mhz-1575Mhz
1575Mhz
Band 2: 1575Mhz-1575Mhz
1575Mhz
Band 3: 1575Mhz-1575Mhz
1575Mhz

Settings

Example:

  1. Select signal display: All signals including 'show individual signals'.
  2. Select '56 MHz' bandwidth.
  3. Select one signal band '1 Band'.
  4. Note quantisation is 3 bits.
  5. Move the red box to select the centre frequency.
  6. Select different bandwidth/channels to explore full capability.

Bandwidth Setting

LabSat 3 Wideband has three bandwidth settings: 56 MHz, 30 MHz and 10 MHz.

The bandwidth of the GNSS signals varies, for example a GPS L1 C/A code signal has a bandwidth of 24 MHz. However, due to the signal design a bandwidth of 9.66 MHz will capture enough data to allow the receiver under test to acquire it, track and navigate.

Other signals with a different signal design like Galileo E1 PRS signal has a bandwidth of 46 MHz and a signal design spread across the bandwidth. They require a higher bandwidth to be recorded.

Frequency Setting

LabSat 3 Wideband is designed to capture and replay GNSS signals in the upper L-Band (1559 - 1610 MHz) and lower L-Band (1164 - 1300 MHz).

Quantisation setting

LabSat 3 Wideband can record and replay GNSS Signals at quantisation levels of:

feedback