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

Front Panel OperationNOTEAfter the scan is configured, keep pressingthe EXIT key (or clicking the EXIT LED)to back out of the menu structure and returnto the normal display mode.Example 1:ARM SPACING = IMMEDIATESCAN SPACING = TIMER, EXTERNAL, GPIB, MANUAL or TRIGLINKCHANNEL SPACING = TIMER, EXTERNAL, GPIB, MANUAL or TRIGLINKStep 7. Start the scanNOTEMake sure the relay status display mode isselected in order to monitor the real-timestatus of each channel on the LED display.Paragraph 4.6.3 explains how to changethe display mode using the front panelkeys. With the optional light pen, theSHOW LIST LED toggles between the relaystatus display mode and the list displaymode.Step 1 of this procedure placed the Model 7002 in the idlestate. In this idle state, a scan cannot be performed. TheModel 7002 is taken out of the idle state by pressing theSTEP key (or clicking the STEP LED).Once out of the idle state, the scan is considered enabled. Thescan will proceed according to how the three layers are programmed.If Immediate spacing is selected, operation willpass immediately into the next layer. If spacing is programmedfor a particular event, operation will not pass intothe next layer until the programmed event occurs.4.10.3 Scanning examplesThe following examples assume two scans of a two-channelscan list. All events in these examples can be substituted bythe STEP key. For example, if the instrument is waiting foran EXTERNAL trigger event, you can instead press STEP toprovide the event.NOTEThe STEP and OPEN ALL keys have LEDcounterparts. Thus, with the optional lightpen, you can click these LEDs instead ofpressing the keys.1. Press OPEN ALL to open all channels and place theModel 7002 in the idle state.2. Press STEP to take the 7002 out of the idle state (ARMindicator turns on).3. The first scan spacing event will pass operation into thechannel layer.4. The first channel spacing event will scan the first channelin the scan list.5. The next channel spacing event will scan the secondchannel.6. The next scan spacing event will pass operation backinto the channel layer.7. The next channel spacing event will scan the first channel.8. The next channel spacing event will scan the secondchannel and disarm (idle) the scan.Example 2:ARM SPACING = IMMEDIATESCAN SPACING = IMMEDIATECHANNEL SPACING = TIMER, EXTERNAL, GPIB, MANUAL or TRIGLINK1. Press OPEN ALL to open all channels and place theModel 7002 in the idle state.2. Press STEP to take the 7002 out of idle state, and operationinto the channel layer.3. The first channel spacing event will scan the first channel.4. The next channel spacing event will scan the secondchannel.5. Operation passes automatically back into the channellayer since IMMEDIATE scan spacing is selected.6. The next channel spacing event will scan the first channel.7. The next channel spacing event will scan the secondchannel and disarm (idle) the scan.4-26