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2. On the VOR, set the course selector to 0° and the track bar (TB) indicator should read center. The TO­ FROM indicator should read FROM. 

3. Set the course selector to 180° and the TO-FROM indicator should read TO and the TB should then be centered. 

Note: Determining the exact error in the receiver is done by turning the track selector until the TB is centered and noting the degrees difference between 180° or 0°. The maximum bearing error with the VOT system check is plus or minus 4° and apparent errors greater than 4° indicate that the VOR receiver is beyond acceptable tolerance. 

## VOR Checkpoint Signs 

Many aerodromes have VOR checkpoint signs that are located beside the taxiways. [Figure 2-51] These signs indicate the exact point on the aerodrome that there is sufficient signal strength from a VOR to check the aircraft’s 

