How can I get a bandscan from QueryAccess?

Let's assume you need a clear frequency for a broadcast to Iran on 25 meters between 1800 - 1900 UTC. How do you get that information from QueryAccess?

Step 1. The first thing you would do is go to: where you'd see a webpage that looks like the graphic below.

Step 2. Then you would select the geographic area that matches your interest. In our example, Bahrain, Kuwait and Yerevan are the closest RMSs to Iran so we'll click on the green-colored Near East Asia portion of the imagemap below.

Step 3. After clicking on the Near East Asia [NEA] portion of the map we see the table below. It indicates that sounds and scans from all NEA locations are 'served' either from Washington [WashDC] or Vienna, Helsinki and New Delhi. You should choose the server location that is geographically closest to you. In this example we'll choose the WashDC server and click on the symbol with 'WashDC' under it.

Step 4. After a moment, you should see something similar to the graphic at the right. Now it's just a matter of selecting things to match your needs. First choose the 'Locations' 'KUWA' [for Kuwait], 'BAHR' [for Bahrain] and 'YERE' [for Yerevan]. You'll do this by clicking on one of them and then holding down the 'Apple' key on a Mac or the 'ctrl' key on a PC while clicking on the other two. When you've done this right, BAHR, KUWA and YERE should be hilighted. Next use the pull-down menus to pick the 11 MHz 'Band', 1800 to 1900 UTC 'Time Range' and the same technique to choose the last 3 days for 'Dates.' Then hit 'View Data.'

Step 5. After a short wait, you should see something similar to the graphic below. This window summarizes your selection criteria; in our case, "Locations" BAHR, KUWA and YERE, "Band" 11 MHz, "Time Range" 1800 to 1900, and "Dates." Below this, on the left, you see a window [actually a 'frame'] that says "View Scan Files." In this window you see the actual links to all of the 18 scan files that match your query criteria. If you click on either of the "View Graph" links and have a java-capable browser, you'll see the bandscan in Step 6 - below - in a new browser window.

Step 6. Here finally is the bandscan graph. We call these 'peak-and-valley' graphs. It represents signal levels on the 25 meter band in the 1800-1900utc range over 3 days from 3 different locations. Each location is represented by a different color trace on the graph. This graph is too 'busy' to see any clear frequencies. What you'd really like to do is 'zoom in' on particular sections and be able to 'walk' up and down the band to find a 'hole' for your broadcast requirement. Thanks to the magic of java and the internet you CAN do just that!

Step 7. Refering to the instructions at the bottom of the graph above, we'll hold down the SHIFT key and click on the graph. As this is done we actually 'zoom in' on the place we're clicking. Once you reach a zoom level that lets you see clear frequencies clearly you can start 'walking' up and down the band by clicking on the graph either on the left or right of center. Try it!