Notice 2022-CEB001

September  09, 2022

Guidance on Radio Standards Specification RSS-195 — Wireless Communication Service (WCS) Equipment Operating in the Bands 2305-2320 MHz and 2345-2360 MHz, Issue 2

Background

The objective of this notice is to reaffirm the requirements set forth in section 5.6 of Radio Standards Specification 195 (RSS-195), Issue 2 pertaining to Transmitter Unwanted Emissions.

Guidance related to section 5.6 Transmitter Unwanted Emissions

Section 5.6 of RSS-195, issue 2 states:

 

The transmitter unwanted emissions shall be measured with a resolution bandwidth of 1 MHz. A smaller resolution bandwidth is permitted provided that the measured power is integrated over the full required measurement bandwidth of 1 MHz. However, in the 1 MHz bands immediately adjacent to the edges of the frequency range(s) in which the equipment is allowed to operate, a resolution bandwidth of as close as possible to, without being less than 1% of the occupied bandwidth, shall be employed provided that the measured power is integrated over the full required measurement bandwidth of 1 MHz.

 

 

In order to demonstrate compliance with the unwanted emission limit of -13 dBm/MHz, the power level measured within the first 1 MHz immediately adjacent to the channel edges shall be integrated over the full 1 MHz bandwidth with a resolution as close as possible to 1% (no less than 1%) of the occupied bandwidth.

 

ISED notes that variances between RSS documents exist concerning limits and measurement methods to determine transmitter unwanted emissions levels in the first 1 MHz immediately adjacent to the channel edges. These variances are due to specific co-existence requirements for adjacent services associated with particular frequencies. In RSS-195, the more stringent requirements were deemed necessary in order to reduce the risk of harmful interference between WCS equipment and the adjacent services.