Transmission Phase Shift - Radwin 2000+ SERIES User Manual

Transmission Phase Shift
12.4.2 Transmission Phase Shift
In the case shown in Figure 12‐5 above, RT‐A(HBS) A1 transmits and receives opposite RT‐
B(HSU) B1. So, when RT‐A(HBS) A1 transmits, RT‐B(HSU) B1 must receive, and vice‐versa. The
above Radio Frame Pattern will then appear as follows:
However, RT‐A(HBS) B1 is co‐located with RT‐B(HSU) B1. As can be seen, this will cause
interference between these co‐located units.
1
To prevent this, RT‐A(HBS) B1 must have its transmission phase shifted. That is, the
transmission and receive times of RT‐A(HBS) B1 must be reversed, as shown:
As a result, the radio frame pattern of RT‐A(HBS) B1 is synchronized with that of RT‐B(HSU) B1,
and there is no interference between these two units. Configuring GHSS with an Internal GPS
Unit below describes how to configure the RT‐A(HBS) for this.
1. Another option is to shift the transmission phase of HBS A1 instead of HBS B1, but that requires shifting the
phases of *all* HBS units at Site A1, which is more time‐consuming.
RADWIN 2000+ Series User Manual Release 4.2.40 12‐9