ULTRA 4 INSTRUCTION MANUAL 
 
170 
P905 Sensitivity  
This parameter determines the sensitivity of the unit. Please consult Pulsar 
for further information and assistance on changing the value of this 
parameter.  
P906 Side Clearance  
This parameter is used to set the distance by which the DATEM trace will 
“stand-off” from around unwanted echoes such as obstructions. Please 
consult Pulsar for further information and assistance on changing the value 
of this parameter.  
System Parameters 
Passcode 
P921 Enable Code 
Enables the passcode (P922), which means the passcode must be entered 
to go into program mode. If disabled (set to 0), then no passcode is 
required, and ENTER is used to enter program mode. Default =1 (Enabled) 
P922 Passcode 
This is the passcode that must be used to enter program mode. The default 
is 1997, but this can be changed to another value from 0 to 9999. 
Backup 
P925 Parameter Backup & Restore 
This parameter is used to make a backup of all parameters, for example to 
ensure a default set is maintained within the unit. If alterations are made to 
the parameters that do not work as intended, then the backup set can be 
restored into the unit. 
You can make two separate backup copies if you wish, called backup 1 and 
backup 2, and restore from either. The options are: