NZART Amateur Examination &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp page 10&nbsp &nbsp &nbsp &nbsp &nbsp NZARTX07 Security code 249733
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<br>

<li>  When someone in the neighbourhood complains of TVI it 
is wise to: 

<ol type = a>

<li> deny all responsibility 

<li> immediately blame the other equipment 

<li> inform all the other neighbours 

<li> check your log to see if it coincides with your 
transmissions 


</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>  An operational amplifier connected as a filter always 
utilises: 

<ol type = a>

<li> positive feedback to reduce oscillation 

<li> negative feedback 

<li> random feedback 

<li> inductors and resistor circuits only 


</ol>
<br>

<li>  <img src = "digista.gif" align = right width = 352 height = 
93> 
<extralines = 1 totallines = 6 >
In the block diagram shown, the "modem": 

<ol type = a>

<li> monitors the demodulated signals 

<li> de-emphasises the modulated data

<li> translates digital signals to and from audio signals 

<li> determines the modulation protocol 
 

</ol>
</ol>