The transmitter unwanted emissions shall be measured using an average detector and a resolution bandwidth equal to the measurement bandwidth specified in table 1. A lower resolution bandwidth may be employed near the channel edge, provided the power is integrated over a 100 kHz bandwidth. Any suitable method of measurement can be used provided that it is fully described in the test report. ISED's Certification and Engineering Bureau shall be consulted to determine the acceptability of the method. The IEEE 1631 document can be used for guidance while measuring this emission mask.
The power of unwanted emissions in the measurement bandwidth shall be attenuated below the average transmitted power in a 6 MHz bandwidth, P (dBW), by the limits specified in table 1 below, or shall comply with the field strength limits indicated in RSS-Gen table 5, General field strength limits at frequencies above 30 MHz, where applicable.
∆f (MHz) is the frequency separation from the edge of the nominal channel used by the equipment to the centre of the measurement bandwidth. Figure 1 shows the unwanted emissions limits for a 100 kHz measurement bandwidth with ∆f less than 18 MHz.
Table 1 — Unwanted emission limits
|Frequency separation, ∆f (MHz)||Out-of-channel attenuation (dB) or field strength||Measurement bandwidth|
|0.05 ≤ ∆f ≤ 6||44.9 + 1.1*(∆f)1.6||100 kHz|
|6 ≤ ∆f ≤ 12||37.8 + 4.4*∆f|
|12 ≤ ∆f ≤ 18||70.2 + 1.7*∆f|
|∆f > 18 and within 54-72 MHz, 76-88 MHz, 174-216 MHz and 470-608 MHz||100.8|
|Outside the above cases||Base station equipment:|
43 + 10*log (p)
Where p is the transmitter power in a 6 MHz bandwidth expressed in watts
|100 kHz for fm ≤ 1 GHz|
1 MHz for fm > 1 GHz
As per RSS-Gen, table 5, General field strength limits at frequencies above 30 MHz
|120 kHz for fm ≤1 GHz|
1 MHz for fm > 1 GHz
Where fm is the measurement frequency
Note: As per SRSP-300.512, subscriber equipment certified with this emission mask shall employ only vertical polarization for the transmit antenna, while any polarization can be used for reception. The vertically polarized antenna needs to meet the requirements specified in SRSP-300.512.
Base station equipment certified with this emission mask can employ any type of signal polarization, provided that the RRBS siting restrictions, specified in SRSP-300.512, are observed.
Figure 1 — Unwanted emissions limits with ∆f <18 MHz