Plot command conventions
The Pb, Ps, and Pr commands have a similar structure in their TTY user interface.
Each command first prints a list of subcommands that are valid in that context.
The working and measured parameters for each plot command are printed on the TTY as two lines of information following the subcommand list:
- The first line contains settings that change when a subcommand is issued.
The first line is printed once.
- The second line is live and reflects the current status of the burst input, the IF input,
or the AFC output.
The second line is continually overprinted. This makes it appear as a live status line with up-to-date values.
The Pb, Ps, and Pr commands report No Trigger on the TTY status line when the external trigger is expected, but missing.
| Convention | Description |
|---|---|
| Display commands |
Most plot commands support subcommands that alter the appearance of the display, for example, zoom and stretch. These subcommands make no changes to the working RVP10 calibrations. Display settings are stored in nonvolatile RAM, like the other setup parameters. Previous display settings are restored when you restart each plot command. If the initial list of subcommands disappears off the top, type ? to force a reprint. |
| Exit |
To exit the plot command and return to the TTY main menu, type Q or ESC. All other keys return the plot command to its normal live updating, but the key is otherwise discarded (for example, subcommand keys are not executed while exiting from single step mode). |
|
Lower case commands Upper case commands |
Most commands have a lowercase and an uppercase version. If a lowercase command performs an action, then its uppercase version performs either the same thing on a larger scale, OR the reverse action. For example, if the w subcommand widens a view a little bit, the W widens it a lot. |
| Single Step mode |
By default, the graphical display and TTY status lines are updated with fresh data several times per second. If you wish to freeze a plot for further analysis or comparison enter Single Step mode by typing: "." (period). This causes the display and TTY status lines to freeze in their present state, and prints the message "Paused..." To move to the next data update, retype "." (period). The plot and printout remain frozen at the next data update. |
| Scrolling |
The TTY screen scrolls upward each time a new subcommand is executed to show a history of information lines and command activity. Press ENTER to scroll the display up at any time. |
| % |
Press % to toggle between the IF input SMA connectors on the IFDR. |