Homer Hot Measurement and Tuning System - S-TEAM Lab

To position display windows otherwise than dragging them individually, use functions grouped in the submenu of
Window|Arrange menu item.
NOTE: In HomTool servicing version of HomSoft, clicking the Window|Arrange|Cascade menu item or the
equivalent button causes all windows to assume a predefined arrangement.
To close a display window:
Click the standard closing button. To close all display windows en bloc, click Window|Close All menu item.
When you close all display windows and then terminate the program, one display window with default settings will
open on program restart.
Display Window-Related Menu
Each display window has its own menu, which is, however, merged with the main program menu. The menu items
are
Display, Scale, Trace, Chart
Settings using these menus affect only the currently active display window.
Display
Display menu serves for selecting format and, if applicable, units in which results will be shown. Available formats
are:
Mag: Linear reflection coefficient magnitude M = ||. Available units:
- None Magnitude between zero (perfect match) and 1 (total reflection)
- % Percent: Magnitude between 0% (perfect match) and 100% (total reflection)
- mU Milliunits: Magnitude between 0 mU (perfect match) and 1000 mU (total reflection)
LogMag: Logarithmic reflection coefficient magnitude L = 20 log(M) expressed in decibels (dB). Perfect match
corresponds to L = -, total reflection to L = 0 dB.
Note that return loss R is negative of LogMag: R = –L.
VSWR: Voltage standing wave ratio V = (1+M)/(1–M)
Phase: Phase of reflection coefficient in degrees
Polar: Polar diagram, displaying reflection coefficient as a vector in complex plane
Z-Smith: Impedance Smith chart, mapping complex reflection coefficient to normalized impedance
z = (1+)/(1–)
Y-Smith: Admittance Smith chart, mapping complex reflection coefficient to normalized admittance
y = 1/z = (1–)/(1+)
Oven: An alternative form of polar diagram, rotated counter-clockwise by 90 o and showing circles of constant
VSWR. This form is often used for plotting Rieke diagrams of magnetrons.
Power: Incident, reflected and absorbed power in linear scale. Available units:
- uW microwatts
- mW milliwatts
- W watts
- kW kilowatts
LogPower: Incident, reflected and absorbed power in logarithmic scale. Available units:
- dBm decibels relative to P 0 = 1 mW
- dBW decibels relative to P 0 = 1 W
- dBkW decibels relative to P 0 = 1 kW
LogPower (L P ) is related to linear power P by L P = 10 log(P/P 0 )
User's Handbook Homer Hot Measurement and Tuning System Software Operation 35