Areas of the rope that have little wear and for which a 

 higher amplification can be used can be tested again at a 

 higher amplification or can be re-run from the tape with 

 a higher chart sensitivity (see section 4.6 ). 



As the user becomes more familiar with the ropes under 

 test the setting of gain to keep the LF signal on the 

 chart will be quite straight forward. 



The change from test to test of the LF trace should be 

 watched carefully and the gains used for successive 

 tests should be kept track of to establish the rate of 

 increase of the LF signal. In Fig. 4.10 the gain of the 

 LF amplifiers vs. the Gain Potentiometer setting is 

 shown. To relate the changes in amplitude of the LF 

 trace with successive tests, the amplitude change and any 

 gain change should be noted so that an increase in the 

 'envelope' of rope noise can be kept track of. To find 

 the total 'envelope' change take the change in the 

 'envelope' from the two tests and multiply by a factor of 

 New Gain/Original Gain. This change in the 'envelope' of 

 rope noise should form part of the history of the Rope. 



A-32 



