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Opakovače GSM/3G

Tests of GSM repeaters conducted by the National Institute of Telecommunications in Warsaw, Poland
Original Polish version by Lukasz Kopciuch
GSM repeater Signal GSM-305 A6765
The evidence of compliance with all required standards issued by the National Institute of Telecommunications in Warsaw, Poland
The list of tests
Taking into account the type of equipment for the assessment of conformity with the essential requirements (compliance with Article 3.2 of the Directive 1999/5/EC) on the effective use of radio spectrum, the following test program has been established:
No.Tested parameter
Relevant paragraphs of
Remarks
EN 301 502EN 300 609-4  
1Output power (for downlink and uplink)
   Tests of compliance with the manufacturer's specification
2Gain across the operating band
  Tests of compliance with the manufacturer's specification
3Spurious emissions
4.3.15Measurements at antenna connectors
4Transmitter intermodulation attenuation4.3.26 
5Gain outside the operating band
4.3.37 
6Frequency error
4.3.48 
7GMSK modulation accuracy
4.3.59 
88-PSK modulation accuracy
4.3.610 


ETSI EN 301 502 - Base Station and Repeater equipment covering essential requirements under article 3.2 of the R&TTE directive. The values of parameters and test methods are defined in the ETSI EN 300 609-4 standard.
Tests for conformity with the essential requirements for electromagnetic compatibility characteristics (art. 3.1b of 1999/5/WE Directive).
The results of selected tests
  • Gain across the operating band
    • uplink
Gain in the uplink direction
      Gain |S12| in the uplink direction, input power: -50 dBm
    • downlink
Gain in the downlink direction
      Gain |S21| in the downlink direction, input power: -50 dBm
  • Spurious emissions (EN 300 609-4 clause 5)
    • uplink

Frequency of the radio channelFrequency component
Level of conducted spurious emissions
[MHz][MHz][dBm]
897.6  
all components
<-43.0
  

 

    • downlink

Frequency of the radio channelFrequency component
Level of conducted spurious emissions
[MHz][MHz][dBm]
942.6  
all components
<-43.0
  

 

      • Maximum values (EN 300 609-4 clause 5.3)
Frequency range
Level [dBm]
E-GSM 900DCS 1800
100 kHz to 1 GHz
1 GHz to 12.75 GHz
-36
-30
-36
-30

 

  • Out of band gain (EN 300 609-4 clause 7. ). This is one of the most important parameters describing a repeater. The implementation of solutions that meet the European standard is expensive but makes the device work only in the operating band, without interfering with other devices at close frequencies. The tests are performed for downlink and uplink directions at different temperatures. Here are the results at temperature of 23 degrees Celsius.
    • uplink
Temperature: +23ºCSupplying voltage: 230 VAC
F0ΔFMeasuring frequencyOutput signal powerGain
K
[MHz][MHz][MHz][dBm][dB]
880,0-0,4879,6-25,629,4
-0,6879,4-37,617,4
-0,8879,2-37,517,5
-1,0879,0-37,817,2
-5,0875,0-37,617,4
-10,0870,0-37,517,5
-15,0865,0-37,617,4
-20,0860,0-37,717,3
 +0,4915,4-36,418,6
+0,6915,6-37,817,2
+0,8915,8-36,218,8
+1,0916,0-37,617,4
+5,0920,0-37,717,3
+10,0925,0-37,717,3
+15,0930,0-37,817,2
+20,0935,0-37,917,1
880,2> 5,01760,4 (2 harm.)-37,817,2
> 5,02640,6 (3 harm.)-37,817,2
897,6> 5,01795,2 (2 harm.)-37,717,3
> 5,02692,8 (3 harm)-37,817,2
914,8> 5,01929,6 (2 harm.)-37,917,1
> 5,02744,4 (3 harm.)-37,917,1

Measurements were performed with PIN=-60 dBm (-10 dB compared to PIN=-50 dBm for which POUT=10 dBm). Measurement uncertainty +/-0,1 dB.     

      • Maximum values (EN 300 609-4 clause 7.3)
ΔFMaximum gain
[MHz][dB]
≤ -0,4 or ≥ 0,450
≤ -0,6 or ≥ 0,640
≤ -1,0 or ≥ 1,035
≤ -5,0 or ≥ 5,025
    • downlink
Temperature: +23ºCSupplying voltage: 230 VAC
F0ΔFMeasuring frequencyOutput signal powerGain
K
[MHz][MHz][MHz][dBm][dB]
925,0-0,4924,6-25,129,9
-0,6924,4-34,720,3
-0,8924,2-34,820,2
-1,0924,0-34,520,5
-5,0920,0-34,920,1
-10,0915,0-35,020,0
-15,0910,0-35,020,0
-20,0905,0-35,020,0
960,0+0,4960,4-26,328,7
+0,6960,6-34,820,2
+0,8960,8-34,021,0
+1,0961,0-35,020,0
+5,0965,0-34,920,1
+10,0970,0-34,920,1
+15,0975,0-34,920,1
+20,0980,0-35,020
925,2> 5,01850,4 (2 harm.)-35,020,0
> 5,02775,6 (3 harm.)-35,119,9
942,6> 5,01885,2 (2 harm.)-35,020,0
> 5,02827,8 (3 harm.)-35,119,9
959,8> 5,01919,6 (2 harm.)-35,020,0
> 5,02879,4 (3 harm.)-35,020,0

Measurements were performed with PIN=-55 dBm (-6 dB compared to PIN=-49 dBm, for which Pwy=9,9 dBm). Measurement uncertainty +/-0,1 dB. 

      • Maximum values (EN 300 609-4 clause 7.3)
ΔFMaximum gain
[MHz][dB]
≤ -0,4 or ≥ 0,450
≤ -0,6 or ≥ 0,640
≤ -1,0 or ≥ 1,035
≤ -5,0 or ≥ 5,025
  • Electromagnetic radiation (EN 55022 Class B Electric Field Strength 10 m QP)
    • uplink
Electromagnetic radiation. Input signal level: -60 dBm

      • Maximum values (EN 55022 Class B Electric Field Strength 10 m QP)
Frequency range
30 MHz to 230 MHz230 MHz to 1 GHz
Acceptable level of emission (quasi peak)30 dBμV/m37 dBμV/m
    • downlink
Electromagnetic radiation. Input signal level: -60 dBm


      • Maximum values (EN 55022 Class B Electric Field Strength 10 m QP)
Frequency range30 MHz to 230 MHz230 MHz to 1 GHz
Acceptable level of emission (quasi peak)30 dBμV/m37 dBμV/m

 

All these results confirm high quality of Signal repeaters. The results of the tests show large margins of safety compared to the limit values.