ETSI EN 300 220
The ETSI EN 300 220 standard describes how measurements should be performed on short range devices operating between 25 and 1000 MHz.
The general title of this standard is: "Short Range Devices (SRD) operating in the frequency range 25 MHz to 1000 MHz".
The standard is divided in a few parts:
| Standard | Title | Latest version | Release date |
|---|---|---|---|
| ETSI EN 300 220-1 | Part 1: Technical characteristics and methods of measurement | 3.1.1 | 2017-02 |
| ETSI EN 300 220-2 | Part 2: Harmonised Standard for access to radio spectrum for non specific radio equipment | 3.2.1 | 2018-026 |
| ETSI EN 300 220-3.1 | Part 3-1: Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU; Low duty cycle high reliability equipment, social alarms equipment operating on designated frequencies (869,200 MHz to 869,250 MHz) | 2.1.1 | 2016-12 |
| ETSI EN 300 220-3.2 | Part 3-2: Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU; Wireless alarms operating in designated LDC/HR frequency bands 868,60 MHz to 868,70 MHz, 869,25 MHz to 869,40 MHz, 869,65 MHz to 869,70 MHz | 1.1.1 | 2071-02 |
| ETSI EN 300 220-4 | Part 4: Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU; Metering devices operating in designated band 169,400 MHz to 169,475 MHz | 1.1.1 | 2017-01 |
The actual measurement procedures are described in Part 1. The other parts are mostly referring to the measurement procedures as described in Part 1, with applicable limitations for the type of the device that is being measured.
Test procedures[edit]
Several different measurements are described in the ETSI EN 300 220-1.
| Clause | Measurement | Explanation |
|---|---|---|
| 5.2 | Effective Radiated Power | This is a 'standard' emission test, which is measuring the power of the transmission signal. |
| 5.3 | Maximum Effective Radiated Power spectral density | This is a 'standard' emission test, which is measuring the occupied bandwidth of the transmission signal with a sweeptime of 1 minute. |
| 5.4 | Duty Cycle | |
| 5.5 | Duty Cycle Template | The duty cycle of the transmission during the period of 1 second should be measured. This can be performed using the MIMO measurement. RadiMation Application Note 102 explains how the MIMO measurement can be performed with RadiMation. |
| 5.6 | Occupied Bandwidth | The measurement of the transmission signal can be performed with an emission measurement in RadiMation®. The calculation of the 99% Occupied Bandwidth is not yet supported, but can be performed by exporting the measurement data to for example Microsoft Excel to perform the actual calculation. |
| 5.7 | Frequency Error | The frequency of the transmission should be measured in normal conditions, and under both extreme test conditions. The measurement of the frequency can be performed by using a 'standard' emission test. |
| 5.8 | Tx Out of Band Emissions | This is a 'standard' emission test, which can be performed by a Radiated Emission Multiband or a Conducted Emission Multiband test. The to be measured frequency ranges and the applicable limits are however depending on the transmit frequency and transmit power of the device itself, so should be adjusted accordingly. |
| 5.9 | Unwanted Emissions in the spurious domain | This is 'standard' emission test, which can be performed on the antenna terminal or from the cabinet itself. The allocated transmit band and the out-of-band domain (which is linked to the allocated transmit band) do not have to be measured. The applicable limit should thus be adjusted to this accordingly. |
| 5.10 | Transient power | At specific frequencies related to the transmission frequency, a zero-span measurement should be performed while the EUT is turned off and on. This can be done in a 'standard' emission test, where each offset frequency is measured by performing a final measurement on an individual detected peak. |
| 5.11 | Adjacent Channel Power | |
| 5.12 | TX behaviour under Low Voltage Conditions | The applicable measurements and limitations (as measured by the other clauses) should remain within limits if the power supply voltage is being reduced. |
| 5.13 | Adaptive Power Control | The transmit power should be monitored over an interval of 60 seconds. This can for example be performed by using a powermeter in Virtual instruments mode, performing automatic triggering for a period of 60 seconds. |
| 5.14 | RX sensitivity level | |
| 5.15 | Adjacent channel selectivity | |
| 5.16 | Receiver saturation at Adjacent Channel | |
| 5.17 | Spurious response rejection | |
| 5.18 | Blocking | |
| 5.19 | Behaviour at high wanted signal level | |
| 5.21 | Polite spectrum access | |
| 5.22 | Bi-Directional Operation Verification |
Most measurements in the standard allow that the measurement is done on the antenna terminal of the device if it is directly available, or otherwise an emission measurement of the total cabinet itself is allowed.
If the antenna terminal should be measured, it is a 'Conducted' emission measurement, and it is best to use the 'Conducted Emission Multiband' test, where the 'Antenna Terminal' is selected as the test type. The result will be presented as power values (in dBm, dBpW, W, mW, etc...).
If the cabinet itself should be measured, it is a 'Radiated' emission measurement, and it is best to use use the 'Radiated Emission Multiband' test, where the 'Antenna spurious and Harmonic outputs' is selected as the test type. The result will be presented as power values (in dBm, dBpW, W, mW, etc...).