Channel Window Layout and Functions

The channel windows display measurement results in the form of traces and numerical values. The screen can display up to 16 channel windows simultaneously. Each window corresponds to one logical channel. A logical channel can be considered to be a separate analyzer with the following settings:

• Stimulus signal settings (frequency range, power level, sweep type);
• IF bandwidth and averaging;
• Calibration.

The physical analyzer processes the logical channels sequentially.

In turn, each channel window can display up to 16 trace of measured parameters. The general view of the channel window is represented in Figure 21.

Figure 21 Channel window

Channel Title Bar

The channel title feature allows you to enter your comment for each channel window. You can hide the channel title bar to gain more screen space for graph area.

Trace Status Field

The trace status field displays the name and parameters of a trace. The number of lines in the field depends on the number of active traces in the channel.

Each line contains the data of one trace of the channel:

• Trace name from «Tr1» to «Tr16». The active trace name is highlighted in an inverted color;
• Measured parameter: S11, S21, S12, S22, or absolute power value: A(n), B(n), R1(n), R2(n);
• Display format, e.g. «Log Mag»;
• Trace scale in measurement units per scale division, e.g. «10.0 dB/»;
• Reference level value, e.g. «►0.00 dB», where «►» is the symbol of the reference level;
• Trace status is indicated as symbols in square brackets (See Table 2).

Trace status symbols definition

Graph Area

The graph area displays traces and numeric data. The graph area contains the following elements:

• Vertical graticule label displays the vertical axis numeric data for the active trace. You can set the display of data for all the traces or hide the vertical graticule label to gain more screen space for the trace display.
• Horizontal graticule label displays stimulus axis numeric data (frequency, power level or time). You can also hide the horizontal graticule label to gain more screen space for the trace display.
• Reference level position indicates the reference level position of the trace.
• Markers indicate the measured values at points along the active trace. You can simultaneous display of markers for all traces.
• Marker functions: statistics, bandwidth, flatness, RF filter.
• Trace number allows trace identification when printing in black and white.
• Current stimulus position indicator appears when sweep duration exceeds 1.5 sec.

Trace Layout in Channel Window

If the number of the displayed traces is more than one, you can rearrange the traces to suit your preference. You can allocate all the traces to one graph or display of each trace in an individual graph.

Markers

The markers indicate the stimulus values and the measured values at selected points of the trace.

The markers are numbered from 1 to 15. The reference marker is indicated with an R symbol. The active marker is indicated in the following manners: its number is highlighted with inverse color, the indicator on the trace is located above the trace, and the stimulus indicator is fully colored.

Channel Status Bar

The channel status bar is located in the bottom part of the channel window. It contains the following elements:

• Sweep progress field displays a progress bar when the channel data are being updated.
• Error correction field displays the integrated status of error correction for S-parameter traces. The values of this field are represented in Table 3.
• Receiver correction field displays the integrated status of receiver correction for absolute power measurement traces. The values of this field are represented in Table 4.
• Power correction field displays the integrated status of power correction for all the traces. The values of this field are represented in Table 5.
• Port extension field displays the integrated status of execution of this function for S-parameter traces. If the function is enabled for all the traces, you will see black characters on a gray background. If the function is enabled just for some of the traces, you will see white characters on a red background.
• Fixture simulation field displays the integrated status of execution of this function for S-parameter traces. Fixture simulation includes the following operations: Z0 conversion, embedding, and de-embedding. If the function is enabled for all the traces, you will see black characters on a gray background. If the function is enabled just for some of the traces, you will see white characters on a red background.
• Stimulus start field allows for display and entry of the start frequency or power, depending on the sweep type. This field can be switched to indication of stimulus center frequency, in this case the word Start will change to Center.
• Sweep points field allows for display and entry of the number of sweep points. The number of sweep points can be set from 2 to the instrument maximum.
• Sweep type field allows for display and selection of the sweep type. The values of this field are represented in Table 6.
• IF bandwidth field allows for display and setting of the IF bandwidth. The values can be set from the instrument minimum to 30 kHz.
• Power level field allows for display and entry of the port output power. In power sweep mode the field switches to indication of CW frequency of the source.
• Averaging status field displays the averaging status if this function is enabled. The first number is the averaging current counter value, the second one is the averaging factor.
• Stimulus stop field allows for display and entry of the stop frequency or power, depending on the sweep type. This field can be switched to indication of stimulus span, in this case the word Stop will change to Span.

Error correction field

Receiver correction field

Power correction field

Sweep types