NZART Amateur Examination &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp page 5&nbsp &nbsp &nbsp &nbsp &nbsp NZARTX07 Security code 261426
<ol start = 29>
<br>

<li>  In the block diagram shown, the additional signal path 
above the 
"linear amplifier" block indicates that: 
<img src = "hfsta.gif" align = center width = 600 height = 
170> 
<totallines = 16 >

<ol type = a>

<li> some power is passed around the linear amplifier for 
stability 

<li> "feed-forward" correction is being used to increase 
linearity 

<li> the linear amplifier input and output terminals may be 
short-circuited 

<li> the linear amplifier may be optionally switched out of 
circuit to reduce output 
power 

</ol>
<br>

<li>  In the block diagram of the receiver shown, the "RF 
amplifier": 
<img src = "fmrx.gif" align = center width = 600 height = 151> 
<totallines = 16>

<ol type = a>

<li> decreases random fluctuation noise 

<li> masks strong noise 

<li> should produce little internal noise 

<li> changes the signal frequency 


</ol>
<br>

<li>  In the block diagram of the receiver shown, the "mixer": 
<img src = "fmrx.gif" align = center width = 600 height = 151> 
<totallines = 16>

<ol type = a>

<li> changes the signal frequency 

<li> rejects SSB and CW signals 

<li> protects against receiver overload 

<li> limits the noise on the signal 


</ol>
</ol>
<a href = page6.htm  > Go to next page </a>