Cw 100r updating
Notice how difficult it would be on the 80m plot above to determine the resonant point by only looking at resisance (or SWR for that matter).But it is a trivial task to see the resonant point by looking at the phase angle.The mini-panel, shown running at W1MH's remote base station, allows for a simple display of power and SWR. Below are reduced size screen grabs from alpha version 0.97 of the Plot program.The maxi-panel, not shown, also displays Z, R, X, and Phase, along with an entry box for your callsign, which is displayed in the LP-100A screen saver. This version has a nicer graphing component, than the earlier version I reported on.The LP-100 Virtual Control Panel (VCP), below, is supplied free of charge.It allows for remote monitoring of the LP-100A's measurements.Also included are comparisons of Plot to my HP VNA with a 2-30 MHz sweep of a reactive load I use for calibrating the LP-100As, and with a pi-net filter.The filter demonstrates the versatility of the LP-100A and Plot program.
This allows placing a DUT (device under test) between the transmitter and LP-100A coupler, allowing power response measurements of filters and other frequency sensitive devices.
Plot uses a variety of methods to control the transmitter.
Direct control of Kenwood and Elecraft K2 are provided, as well as transparent linking to three popular rig control / logging programs...
Phase crosses zero at 3.75 MHz, the resonant frequency.
Included are antenna plots of R j X, SWR, RL, Smith and the newly added Power display.
It shows the power response of a homebrew low pass filter, as well as the input impedance when terminated with a 50 ohm load.