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

Front Panel Operation3. Two or more closed channels in the Channel Pattern becomeinterlocked. Channels become interlocked byspecifying them in the Interlock lists.The following examples demonstrate how a Channel Patternis lost:1. Assume a Channel Pattern includes channel 1!21 as aclosed channel and the assignment for slot 1 is changedto a multiplexer card that has only 20 channels. Sincechannel 1!21 no longer exists, the Channel Pattern iscleared.2. Assume a Channel Pattern includes channel 1!1 as aclosed channel and the assignment for slot 1 is changedto a matrix card. Since channel 1!1 is an incorrect formatfor a matrix card, it no longer exists. The Channel Patternis cleared.3. Assume a Channel Pattern includes channel 1!21 andthe slot (slot 1) is configured for 2-pole operation.Changing the pole-mode of slot 1 to 4-pole operationmakes channel 1!21 unavailable and clears the ChannelPattern.4. Assume a Channel Pattern includes channel 1!1. Ifchannel 1!1 is then added to the restricted channel list,the Channel Pattern is cleared.5. Assume a Channel Pattern includes channel 1!1 and 1!2.If these two channels are then interlocked to each other,the Channel Pattern is cleared.6. Assume a Channel Pattern includes channel 1!1 andCard Pair 1&6 is enabled. Note that with the card pairenabled, channel 6!1 is indirectly included in the ChannelPattern. If channel 6!1 is then added as a restrictedchannel, the Channel pattern will clear since one of itschannels has become restricted.7. Assume a Channel Pattern includes channels 1!1 and1!2, and Card Pair 1&6 is enabled. Note that with thecard pair enabled, channels 6!1 and 6!2 are indirectly includedin the Channel Pattern. If channels 6!1 and 6!2are then specified as interlocked channels, the ChannelPattern will clear since an interlock violation was introducedinto the Channel Pattern.Note that if a Channel Pattern is included in the Scan List(i.e. M1) and the Channel Pattern is lost (as explainedabove), then the Scan List will also be lost (see paragraph4.8).4.11.1 Storing channel patterns (STORE)There are two methods to store a channel pattern. One methodis to actually close and open the desired channels and thensave that pattern into memory. The other method is to definea list of channels and then save that channel list into memory.The channels defined in the list will be the closed channelsof the pattern. All the unlisted channels will be open.Perform the following steps to store a channel list inmemory:1. Decide on which storage method you wish to use:a. If you want to store an actual pattern of open andclosed channels into memory, go ahead and openand close the desired channels.b. If you want to store a list of the closed channels forthe channel pattern, go ahead and define the channellist.2. Press STORE to display the following menu:STORE TO MEMORYRELAY-PATTERN CURRENT-LIST3. Place the cursor on the appropriate selection:a. Place the cursor on RELAY PATTERN if storing theactual pattern of open and closed channels.b. Place the cursor on CURRENT-LIST if storing thedefined channel list.4. With the cursor on the appropriate selection, press EN-TER. One of the following typical messages will be displayed:STORE CHANS AT #001 or STORE LIST AT #001Both messages indicate that storage will occur at memorylocation 1 (M1).NOTEYou can cancel the store operation at thistime by using the EXIT key to back out ofthe menu structure.5. If you wish storage to occur at the displayed memory locationproceed to step 6. Otherwise, use the cursor keys( and ) and the numeric keypad to key in the desiredmemory location (001 to 500).4-28