Model 7002Switch System Instruction Manual - Advanced Test ...

Front Panel OperationClicking one of the following LEDs is analogous to pressingthe similarly labeled front panel key.OPEN ALL SCAN LISTOPEN INSERT -CLOSE DELETE EXITSTEPENTERWhen one of the above LEDs is clicked, the LED will blinkfor a couple of seconds to indicate that the associated operationis being performed. Note that the SCAN LIST LED alsoprovides status. When the SCAN LIST LED is brightly lit,the scan list is currently selected, and when dimly lit (or off),the channel list is selected.The following four LEDs do not have front panel key counterpartsand are explained as follows:BACKSPACE — Clicking this LED moves the VFD cursorback (left) to the previous channel entry and removes it fromthe list. The channel entry could be a single channel or arange of channels. If the cursor is at the home position (firstentry in the list), clicking BACKSPACE deletes that channelentry. This is analogous to pressing the key and then theDELETE key.HOME — Clicking this LED will move the VFD cursor tothe beginning of the list.END — Clicking this LED will move the VFD cursor to theend of the list.SHOW LIST — Clicking this LED toggles the instrumentbetween the list display mode (LED brightly lit) and the relaystatus display mode (LED dimly lit or off).4.5.3 Light pen messagesThe following VFD messages are associated with light penoperations:MessageLIGHT PEN MIS-READINVALID SELECTIONEXIT from menubefore using the light pen.ExplanationLED not activated when lightpen button is pressed. Occurswhen the light pen is too faraway from the LED or is notpointed at the LED.LED not available for activation.Occurs when clicking anLED for a channel that does notexist (channel LED completelyoff).LED not available while in amenu. Occurs when an LED(other than Exit or Enter) isclicked while in a menu structure.When any of the above messages occur, the operation associatedwith the LED is simply not performed.4.6 Display modesThere are two basic display modes for the Model 7002:Relay status display mode — Use this display mode whenopening/closing or scanning channels. The channel LEDsprovide the real-time state (on or off) of each channel in theswitch systemList display mode — You can use this display mode whencreating a channel list or a scan list. The brightly lit channelLEDs correspond to channels that are included in the selectedlist.In addition to the two basic display modes, you can also controlthe LED graticule. Disabling the LED graticule providesincreased contrast between on and off LEDs by eliminatingthe dimly lit state. Each LED will either be off or brightly lit(see paragraph 4.6.4 for more information).4.6.1 Relay status display modeIn the relay status mode, the channel LEDs provide real-timestatus (open or closed) of each available channel. This displaymode is denoted by the “RELAY STATUS” message on4-8