1 files changed, 3 insertions, 1 deletions

diff --git a/08.-Passive-Radar.md b/08.-Passive-Radar.md
index 493af49..5fa456d 100644
--- a/08.-Passive-Radar.md
+++ b/08.-Passive-Radar.md
@@ -41,10 +41,12 @@ The first trick is to use walls, buildings, and other objects to block the refer
 The second trick is to use polarization to our advantage. A HDTV station may be either horizontally or vertically polarized. The reference Yagi should be oriented with a matching polarization for best reception. However, the surveillance antenna could be oriented in the opposite polarization. The reasoning behind this is that any reflected signals are probably somewhat randomly scattered in terms of polarization, so any antenna orientation should work for the surveillance antenna. And by orienting it in the opposite polarization we get a natural 20dB attenuation of the reference signal.
 
 # Passive Radar Software
-At the time of writing this manual, we have created software that can implement basic 2-channel passive radar. To install it please see our website at krakenrf.com for the most up to date instructions.
+At the time of writing this manual, we have created software that can implement basic 2-channel passive radar. 
 
 Like the direction finding-software, the passive radar software has a configuration and spectrum display screen. The difference is the last page, which is the Passive Radar range-doppler display.
 
+Note that Receiver 1 is the reference channel. Receiver 2 is the surveillance channel.
+
 ## Passive Radar Configuration Settings
 
 **Enable Passive Radar:** Enable the passive radar computations to be performed.