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Software Cont’d
Basic Operation
When you first launch Plot, you should see something similar to the above, although the default display is R+jX. If you don't see the setup info at the
bottom, select Diag in the Setup menu. Select the LP-100A com port number in the far left com port selector, and the firmware range of your LP-100A
firmware. You should immediately see a Command string from the LP-100A, similar to the above. The LP-100A must be in Average mode for sweeps.
Next, select your method of rig control. If you are using a Kenwood rig, you will be able to control the rig directly. Select Kenwood for Control Program,
enter the rig's com port and baud rate in the indicated areas, and select a transmit mode. FSK generally works best for most rigs. If you are using a K2,
select K2, select the correct com port and set baud rate to 4800. Mode doesn't matter for K2, as it is permanently set to "tune".
If you have another brand/model, you will need to select a CAT/logging program for control. The choices are TRX-Manager, DXLabs Commander and
Ham Radio Deluxe (HRD). First make sure that your rig is being controlled by the CAT program. Once you have established that it is, simply select the
proper program from the Control Program list. The com port and baud rate are set in the CAT program in this mode, not in Plot.
Next, set a start and stop frequency for the scan. Plot automatically adds 1 kHz to the start frequency and subtracts 1 kHz form the stop frequency. This
is necessary because some rigs will not transmit at the band edges in all modes. Set a step size. For single band scans of most bands, 50 kHz is a good
size. Sometimes larger steps with Spline or Best Fit will give a smoother curve.
Select the parameter you wish to display, and click Run. The program will step through the frequencies, and gather the data. The raw data will be
displayed as it goes, and the frequency box under the Start Frequency will update. If you have "Sign" checked, at the end of the scan the program will
correct the sign of X or phase based on the detection algorithm. If there are a few bad points, which can happen when Z is very flat, you can correct
them by clicking on the bad points. They will flip sign. This can be done repeatedly to smooth up the curve. R+jX, Z/Phase and Smith can all be edited
this way, and the results will be reflected in any of the other screens. You can change between parameters without affecting the data unless you start
another scan or click Reset.
I you use a large step size, the curve can be smoothed further by selecting Spline or Best Fit. The Z screen above uses linear interpolation (none
selected). The screen below uses Best Fit. Spline looks similar to linear for small step sizes, but is smoother for large step sizes. You can switch
between curve types after scanning without affecting data. You can also zoom into the chart vertically. Just click and drag to expand a chart. Right
clicking in the chart area cancels zoom.
For future operational input, see Recommended Procedures below.
Содержание LP-100A
Страница 18: ...18 Schematic Page 1...
Страница 19: ...19 Schematic Page 2 Coupler Schematic...
