performing software startup and initialization and GPS synchronization for both the mobile location apparatus using the first GPS system and the fixed location apparatus using the second GPS system;

verifying that the speed of the test vehicle exceeds a pre-selected minimum speed;

storing in the first event log a GPS time, GPS location and speed of the test vehicle when the test vehicle exceeds the pre-selected minimum speed;

adjusting the programmable attenuator based on the location of the test vehicle;

determining and storing noise levels in the first event log;

placing the mobile test transceiver in transmit mode;

if no transmission occurs within a pre-set period of time, returning to verifying;

transmitting a test message having a preamble portion and an audio portion both with known, fixed durations from the mobile location apparatus to the fixed location apparatus through the radio system;

further placing the mobile test transceiver in receive mode;

detecting reception of a preamble portion at the fixed location apparatus;

recording in the second event log the time of detection of a preamble portion;

initiating recording of an audio portion at the fixed location apparatus after expiration of the known duration for a preamble portion;

stopping recording of an audio portion at the fixed location apparatus after expiration of the known duration for an audio portion;

further storing the received recorded audio portion in the second event log as a digital file with a unique identifier together with the time when the received audio portion was received at the fixed location apparatus;

if an election was made not to assign DAQ scores in real time, jumping to pausing;

comparing the received recorded audio portion with a stored reference audio file;

assigning a score for DAQ to the received recorded audio portion;

associating the location tested with the score for DAQ for that location;

yet additionally storing the assigned DAQ score and associated location in the second event log;

pausing for a pre-determined period of time, after the expiration of which, the time is stored by the stationary control computer in the second event log;

yet further placing the stationary test transceiver in transmit mode;

if no transmission occurs within a pre-determined period of time, returning to detecting;

further transmitting a test message having a preamble portion and an audio portion both with known, fixed durations from the fixed location apparatus to the mobile location apparatus through the radio system;

still further placing the stationary test transceiver in receive mode;

monitoring for reception of a preamble portion transmitted by the stationary test transceiver to the mobile test transceiver;

if no preamble is detected within a specified time period, returning to verifying;

yet further storing in the first event log the GPS time, GPS location and test vehicle speed corresponding to when the preamble portion was detected;

collecting and storing RF signal strength levels in the first event log;

further initiating recording of an audio portion at the mobile location apparatus after expiration of the known duration for a preamble portion;

further stopping recording of an audio portion at the mobile location apparatus after expiration of the known duration for an audio portion;

additionally storing the received recorded audio portion in the first event log as a digital file together with a unique identifier;

if an election was made not to assign DAQ scores in real time,

pausing for a pre-determined period of time; and

returning to verifying until the allotted period of time has expired;

further comparing the received recorded audio portion with a stored reference audio file;

assigning a score for DAQ to the received recorded audio portion;

further associating the location tested with the score for DAQ for that location;

still further storing the assigned DAQ score and associated location in the first event log;

indicating on the display unit whether the location tested has passed or failed the test;

further pausing for a pre-defined time delay, and

returning to verifying until the allotted period of time has expired.