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

Front Panel OperationSHOW SCANDisplay mode VFD message LIST LED LIST LEDChannel list See Figure 4-8A Brightly lit Dimly lit(or off*)Scan list See Figure 4-8B Brightly lit Brightly lit*LED is off if the LED Graticule is disabled (see paragraph 4.6.4).COLUMNSLOT 1 1 2 3 4 5 6 7 8 9 101(11)(21)(31)234(20)(30)(40)List includes channels 1, 16, and 39 of slot 1.A) Non-matrix type cardREM TALK LSTN SRQ ARMA) Channel List SelectedSLOT 112ROW34COLUMN1 2 3 4 5 6 7 8 9 10REM TALK LSTN SRQ ARMB) Matrix cardList includes matrix crosspointsR1C1, R2C6 and R4C9 of slot 1.= Channel included in list (Brightly lit LED)B) Scan List Selected Figure 4-9Interpreting channel LEDs (list display mode)Figure 4-8VFD list display modesThe significance of each channel LED while in a list displaymode is summarized in Table 4-2.A channel LED that is brightly lit indicates that it is includedin the selected list. Note that the channel LEDs do not providecomplete information about the scan list. They do notindicate the order that the channels are to be scanned andthey do not indicate whether a channel is used more than onetime in the scan list. The complete scan list, including the orderof the channel scan and repeated channels, is provided bythe VFD.Channel designations for the list display mode are the sameas for the relay status display mode. Figure 4-9A, shows thatchannels 1, 16 and 39 are included in the selected list. Figure4-9B shows that matrix crosspoints R1C1 (row 1, column 1),R2C6 and R4C9 are included in the selected list.NOTEWhen programming the Model 7002, theslot number must be included with the basicchannel designation. Paragraph 4.7 explainshow to determine channelassignments for programming the mainframe.4.6.3 Changing the display modeDuring normal operation, the instrument is either in the relaystatus display mode or in a list display mode. The followinginformation explains how to change the display mode.4-10