3M 965AMS User Manual

2.  Use the up and down arrow 

keys to select the units 

you want to change. Press 

 to change 

the units of measure. An 

“X” in a box indicates your 

choice.

 

Distance: Feet or Meters: 

This affects all distances 

displayed in the 965AMS 

tester.

 

Degrees: Fahrenheit or 

Centigrade: This affects all 

temperatures used in the 

965AMS tester.

 

 

Filter: C-Message or CCITT: This affects the filter 

used in the POTS Noise function. Use the C-Message 

filter in the US and Canada. Use the CCITT (also called 

“Psophometric”) filter in all other countries.

 

The 965AMS tester features a dBrnP filter for noise tests 

in New Zealand. To set the default noise filter to dBrnP, set 

Filter option to CCITT. This filter is used only in units sold 

in New Zealand; for all other countries, the CCITT option 

uses a dBrnOp filter. Noise test results will be displayed 

as dBrnP.

 

TDR: Vp (Velocity Propagation) or m/µS (meters 

per microsecond): This affects the TDR “velocity of 

propagation.” Use “Vp” in the US and Canada. Use “m/µS” 

in other countries. Press 

 to accept any changes and 

return. Use the 

 key to return to the Welcome Screen 

without making changes.