HP E1368A manual Scanning Channels, Selects the Trigger Source

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Scanning Channels

Scanning the Microwave Switch module channels consists of closing a set of channels (connecting the 2 port to the C port) one channel at a time. Single scan, multiple scans (2 to 32767), or continuous scanning modes are available.

The TRIGger:SOURce command specifies the source to advance the scan.

The OUTPut command can be used to enable the HP E1300/E1301 or HP

E1405/E1406 "Trig Out" port. Figure 3-8 illustrates the scanning sequence.

Sets number of Scanning Cycles

ARM:COUN <number> sets 1 to 32767 scanning cycles per INIT command.

Selects the Trigger Source

TRIG:SOUR defines the trigger source to advance the scan.

TRIG:SOUR? queries the current trigger source. Sources are:

BUS = Defines trigger source as a *TRG or HP-IB GET command executed over the HP-IB. With TRIG:SOUR BUS, the scan list is advanced for each *TRG or GET command received.

EXT = TRIG:SOUR EXT sets external triggering. The trigger source is a (user supplied) input to the Event In BNC. Use a +5 V Negative-going pulse to trigger.

HOLD = Prevents execution of triggers until trigger source is changed.

Can use TRIG command to trigger a switchbox set to TRIG:SOUR HOLD.

IMM = Sets immediate (internal) triggering. The scan list is automatically advanced through the scan list. This is the default trigger mode.

Enables TRIG OUT Port

The Trig Out Port is shared by all instruments in the mainframe. With the port enabled (OUTP ON), it generates an output trigger each time after a channel closure for ANY switchbox in the mainframe. The Trig Out port outputs a +5 V negative-going pulse.

Selects Continuous Scanning Cycles

Use INIT ON or INIT 1 to enable continuous cycles. INIT OFF or INIT 0 is fixed number of scans determined by the ARM:COUN command.

Selects the Channel List for Scanning

SCAN <channel_list> defines channels to be scanned using trigger source by TRIG:SOUR command.

Enables Scanning

Enables scanning for any trigger source and closes the first channel in

the channel list.

Advances Channel List

This command advances the channel list when the trigger source is

TRIG:SOUR BUS or TRIG:SOUR HOLD. Command not usable with

TRIG:SOUR EXT or TRIG:SOUR IMM.

Figure 3-8. Example: Scanning Commands

Chapter 3

Using the HP E1368A/69A/70A Modules 39

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Contents Contents Open OPEN? Scan Scanmode SCANMODE? Cpon HP E1368A/69A/70A Modules User’s Manual Contents Certification Documentation History According to ISO/IEC Guide 22 and EN AprilPage Business Reply Mail Page Microwave Switch Description Using This ChapterGetting Started with the HP E1368A/69A/70A Chapter HP E1368A Switches Power Supply CircuitInstrument Definition Programming the Microwave SwitchCard Numbers for Multiple-Module Switchboxes Initial Operation Example Reset the switchbox and close channelConfiguring the HP E1368A/69A/70A Modules Logical Address Selection Setting the Address SwitchInterrupt Priority Selection Selecting the Interrupt PriorityInstalling Switches on the Module Installing Switches on the HP E1369AChapter Configuring the HP E1368A/69A/70A Modules Microwave Switch Installation Connecting Switches External To the Module Selecting Switch Power Selecting Switch Voltage Connecting Field WiringInstalling a Switch Or Attenuator on Module Microwave Switch/Attenuator Installation Shows the internal schematic of a single attenuator section Microwave Switch Commands Using the HP E1368A/69A/70A ModulesReset Conditions Example Single Channel Switching Switching ChannelsPower To connect C to Port 1, execute 33363K 33364K 33365K 33366K Example Multiple Channel Switching Using EXTernal Example Transfer Switch Using Two Port Switches Example Transfer Switch Using One Port Switch Example 4 x 1 Multiplexer To route signal B to the output, executeSelects the Trigger Source Scanning ChannelsOutput 722TRIG EXT … Example Scanning ChannelsExample Multiple Channel Scanning Example Using the Scan Complete Bit110END Recalling and Saving States Detecting Error ConditionsRepeat Synchronizing Instruments Synchronizing the Microwave SwitchQuerying the Microwave Switch Command Types Common Command FormatScpi Command Format HP E1368A/69A/70A Command Reference Chapter Semicolon between the commands. For example Scpi Command Reference ABORtExample Stopping a Scan with ABORt ∙ Number of Scans Use only numeric values between 1 For the number of scanning cycles default isArmcoun ∙ Selecting a Specific Module to be Monitored Use Example Select Module #2 in a Switchbox for MonitoringDISPlay MONitorCARDExample Enabling the Monitor Mode Example Querying the Monitor Mode∙ Selecting the Module to be Monitored Use ∙ Stopping Continuous Scans See the ABORt command INITiateExample Enabling Continuous Scans Example Query Continuous Scanning State Example Query Trig Out Port Enable State OUTPutExample Enabling Trig Out Port Example Closing Microwave Switch Channels ROUTe∙ Closing Channels To close ∙ Opening Channels To open Example Opening Microwave Switch ChannelsOr any combination Example Scanning Using External DeviceChapter HP E1368A/69A/70A Command Reference STATus Example Query the Standard Operation Status Enable Register ∙ Setting Bit 7 of the Status Byte RegisterSTATOPER? CDEScription? SYSTemComments Microwave Switch Module Model Number Example Reading the Error QueueExample Reading the Model Number of a Card #1 Module ∙ Hold or BUS Source Remains If selected, the TRIGgerSOURce ∙ Executing the TRIGgerIMMediate Command a channel listExample Advancing Scan Using the TRIGger Command TRIGgerExample Scanning Using External Triggers ∙ Trig Out Port Shared by Switchboxes See the OUTPut commandExample Query the Trigger Source Scanning Using Bus TriggersHP Command Module User’s Manual, or the ANSI/IEEE Standard Ieee 488.2 Common CommandsScpi Commands for Quick Reference Command Quick ReferenceHP E1368A/69A/70A Command Reference Chapter Operating Temperature Characteristic Impedence 50Ω Insertion LossMaximum Input Power 1 Watt average Connectors Used P1 No. SlotsHP E1368A/69A/70A Specifications Appendix a Register Definitions HP E1368A/69A/70A RegistersAddressing the Registers Reading the RegistersID and Device Type Registers Writing to the Registers Status/Control Register Channel Enable RegisterHP E1368A/69A/70A Registers Appendix B HP E1368A/69A/70A Error Messages Page HP E1368A/69A/70A Modules User’s Manual Index IndexHP E1368A/69A/70A Modules User’s Manual Index HP-IB HP E1368A/69A/70A Modules User’s Manual Index HP E1368A/69A/70A Modules User’s Manual Index HP E1368A/69A/70A Modules User’s Manual Index