don't attempt to send ADJ_STS_BCAST if the modem is busy;

src/p25/Control.cpp

@@ -825,10 +825,12 @@ void Control::clock(uint32_t ms)
 
         m_adjSiteUpdate.clock(ms);
         if (m_adjSiteUpdate.isRunning() && m_adjSiteUpdate.hasExpired()) {
+            if (m_rfState == RS_RF_LISTENING && m_netState == RS_NET_IDLE) {
                 m_control->writeAdjSSNetwork();
                 m_adjSiteUpdate.start();
             }
         }
+    }
 
     // handle timeouts and hang timers
     m_rfTimeout.clock(ms);