Boonton 4500B Peak Power Meter - Manual (Page 77)

Boonton 4500B RF Peak Power Analyzer
Operation 4-5
The units keys labeled G, M, and k are used to enter frequencies in Gigahertz, Megahertz, and kilohertz, respectively. They
operate in a manner similar to the time-related units keys.
You may cancel a value before it is entered by pressing the CLR key. The CLR key is also used to clear status and error
messages from the display.
Two alternative controls are provided for entering selections and numeric data. These are the spin knob and the
right/left/up/down arrow keys. To control the position of traces and lines on the display, rotate the spin knob clockwise to
move up or to the right; counter-clockwise to move down or to the left. To control the size or rate of display elements, rotate
the spin knob clockwise to increase size or rate; counter-clockwise to decrease size or rate. To control the size of non-
graphical parameters, rotate the spin knob clockwise to increase or counter-clockwise to decrease the parameter. Generally,
the right and up arrow keys correspond to clockwise rotation of the knob; the left and down arrow keys to counter-clockwise
rotation Holding down an arrow key causes it to repeat.
4.5 Display Data
The 4500B has four display modes. These are the Graph mode, Text mode, Report mode, and Help mode. Whichever mode
the display is in, the menu portion of the display is always present and active.
The HELP mode is activated by pressing the HELP key. The instrument will display up to three lines of information related
to the active menu. The menus remain active in the help mode. This allows the operator to move to any menu level and make
multiple instrument configuration changes without leaving the help mode. To leave the help mode press the HELP key again
or the ESC key. When a red error message is displayed, pressing HELP will provide more detailed information about the
error.
The REPORT mode is active when a report is requested by a menu selection or a GPIB command. Each report is contains
information on one or more related subjects. The report mode is exited by pressing the ESC key or selecting another display
mode.
The TEXT mode presents a tabular display of measurement values for channels 1 and 2 (if installed). In Pulse measurement
mode, this table consists of all 15 automatic pulse measurements. In all Statistical measurement modes (Model 4500B Opt 10
only), level statistics, marker and reference line values and global measurement status parameters are shown in the units of
the channel. In the Modulated measurement mode a summary of level readings are shown in the units of the channel.
The GRAPH mode is the primary display mode for the instrument. After initialization with the INIT function key, the
display is in the graph mode. The graph mode includes a 501 by 281 pixel waveform display area, header field, menu path
field, priority message field, error message field and general message field. The header field is in the top left corner. Its
display preferences are model number, time and date, sensor temperature and blank. The menu path is located in the upper
right of the display. It shows the current menu location in the menu structure. See Figure 4-2 for menu information. The error
message is below the waveform display on the right. The default color is red. Errors are cleared by pressing the ESC or CLR
key. The general message field is at the bottom of the display. It shows temporary information about the status of the
instrument.
The Priority Message field located below the waveform display in the graph mode. This field displays a series of messages
based on a pre-assigned priority. If multiple conditions exist only the highest priority message is displayed. These messages
describe the current status of the measurement system. Corrective action is needed only if the indicated condition does not
match the users intentions.