SmarTek Systems SAS-1 Setup Using SAS Monitor - Manual (Page 8)

SmarTek Systems (www.smarteksys.com) 8
SAS0001. For example, a traffic monitoring station with three SAS-1s connected to the roadside
cabinet controller using a single home run cable, should have the SAS IDs set to SAS0001,
SAS0002, and SAS0003.
Each SAS ID must be set before the units are “wired” together on
the same home run cable or wireless link. If multiple SAS-1 units are installed sharing the
same home run cable and each have the same SAS ID, then communication with each SAS-1 is
not possible. To correct this situation without physically disconnecting the SAS-1 units, change
each SAS-1 ID, using the SAS Auto ID command described in Section G (Part-G, SAS-1
Detailed Communication Formats).
To set the SAS ID, click the menu item Sensor/Change SAS ID. An Information Dialog
Window will popup asking for the new SAS ID. The new SAS ID may be incremented or
decremented by left clicking in the upper or lower portion or the SAS ID field. After providing
the new SAS ID, click OK. The Status line at the lower left of the display should indicate a
positive response (OK) from the SAS-1 unit. The SAS-ID field will then be updated to the new
ID value. If the positive “OK” response is not quickly received, click the Stop Button and
repeat the Change SAS ID procedure just described.
To communicate to and begin the setup for a specific SAS-1 unit, click the menu item
Sensor/Get SAS ID or click in the SAS ID field (Figure 1) to set the SAS ID field value to the
appropriate value.
Click the menu item Sensor/Get SAS Parameters. Check and set (if necessary) the following
parameters to their respective values as follows:
Dspl Sens 24.75 (higher values show more signal background)
Scale 0.45 (increase to make green acoustic response darker)
Mode 1 (Traffic Acoustic Image Mode-TAI)
Min Det Sensitivity 22.00 (higher values-more sensitive)
Max Det Sensitivity 24.75 (higher values-more sensitive)
Alpha 0.30 (toward 1.0 for less smoothing)
Sens (per lane) 4.00 (As initial value)
SpCal (per lane) 10 (As initial value)
Ocal (per lane) 0.50 (Larger value increase occupancy estimate)
If the Start/Stop button is showing Stop, then click the Stop button. Next click the Save Par
button. After the Save Par button turns to the Send Par button, click it. At this point the
detection sensitivity parameters have been sent to the SAS-1 unit. Click the menu item
Sensor/Write SAS Parameters. This saves the parameter values to the SAS-1’s non-volatile
memory.
For SAS-1 firmware version SAS_131 and higher, the Sensor/Write SAS
Parameters step is not necessary.
Set Detection Zone Position and Size for Multi-Lane Monitoring
The SAS Monitor and Setup program includes Automatic Lane Finder processing. This
processing provides a more automated and quantitative approach for setting the zone or lane
positions. The Lane Finder Function (LFF) will be calculated and displayed as a red plot in the