2.1.Test conditions
2.1.1.The test object is the eCall, which includes a GNSS receiver and a GNSS antenna, specifying navigation characteristics and features of the tested system.
2.1.2.The number of the eCall test samples shall be at least 3 pieces and can be tested in parallel.
2.1.3.The eCall is provided for the test with the installed SIM-card, operation manual and the software (provided on electronic media).
2.1.4.The attached documents shall contain the following data:
device serial number;
hardware version;
software version;
device provider identification number;
relevant technical documentation to perform the tests.
2.1.5.Tests are carried out in normal climatic conditions in accordance with standard ISO 16750-1:2006:
air temperature 23 (± 5) °C;
relative air humidity of 25 % to 75 %.
2.1.6.Tests of the eCall in respect of its GNSS receiver shall be performed with the test and auxiliary equipment specified in Table 1.
Table 1
Recommended list of measurement instruments, test and auxiliary equipment
| Note: it is allowed to apply other similar types of equipment providing determination of characteristics with the required accuracy. | ||
| Equipment name | Required technical characteristics of test equipment | |
|---|---|---|
| Scale range | Scale accuracy | |
| Global navigation satellite system simulator of Galileo and GPS signals | Number of simulated signals: at least 12 | Mean square deviation of random accuracy component of pseudo-range to Galileo and GPS satellites not more than:
|
| Digital stopwatch | Maximum count volume: 9 hours 59 minutes 59,99 seconds | Daily variation at 25 (± 5) °С not more than 1,0 seconds. Time discreteness 0,01 seconds. |
| Vector network analyser | Frequency range: 300 kHz .. 4 000 kHz Dynamic range: (minus 85 .. 40) dB | Accuracy F = ± 1·10– 6 kHz Accuracy D = (0,1 .. 0,5) dB |
| Low-noise amplifier | Frequency range: 1 200 .. 1 700 MHz Noise coefficient: not more 2,0 dB Amplifier gain coefficient: 24 dB | |
| Attenuator 1 | Dynamic range: (0 .. 11) dB | Accuracy ± 0,5 dB |
| Attenuator 2 | Dynamic range: (0 .. 110) dB | Accuracy ± 0,5 dB |
| Power source | Range of direct current voltage setting: from 0,1 to 30 volts | Accuracy V = ± 3 % |
| Current intensity of output voltage: at least 3 amperes | Accuracy A = ± 1 % | |
2.1.7.Unless otherwise specified, GNSS signal simulation shall follow ‘Open sky’ pattern as shown in Figure 1.
Figure 1
Open sky definition
| Zone | Elevation range (degrees) | Azimuth range (degrees) |
|---|---|---|
| A | 0 – 5 | 0 – 360 |
| Background | Area out of Zone A | |
2.1.8.Open Sky plot — Attenuation:
| 0 dB | |
| A | – 100 dB or signal is switched off |