NZART Amateur Examination &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp page 10&nbsp &nbsp &nbsp &nbsp &nbsp NZARTX07 Security code 264678
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<li>  If broadband noise interference varies when it rains, the 
most likely cause 
could be from: 

<ol type = a>

<li> underground power cables  

<li> outside overhead power lines  

<li> car ignitions  

<li> your antenna connection  


</ol>
<br>

<li>  Cross-modulation of a broadcast receiver by a nearby 
transmitter would be 
noticed in the receiver as: 

<ol type = a>

<li> a lack of signals being received 

<li> the undesired signal in the background of the desired 
signal 

<li> interference only when a broadcast signal is received 

<li> distortion on transmitted voice peaks 


</ol>
<br>

<li>  A high-pass RF filter would normally be fitted: 

<ol type = a>

<li> between transmitter output and feedline 

<li> at the antenna terminals of a TV receiver 

<li> at the Morse key or keying relay in a transmitter 

<li> between microphone and speech amplifier 


</ol>
<br>

<li>  When your HF digital transmission is received with errors 
due to multi-path 
conditions, you should: 

<ol type = a>

<li> increase transmitter power 

<li> reduce transmitted baud rate 

<li> reduce transmitter power 

<li> change frequency slightly 


</ol>
</ol>