HP E1368A manual Recalling and Saving States, Detecting Error Conditions

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Recalling and Saving States

This section contains information about saving and recalling switch states.

Storing States The *SAV <numeric_state> command saves the current instrument state. The state number (0-9) is specified in the <numeric_state> parameter. The following settings are saved:

∙Channel States (open or closed)

∙ARM:COUNt

∙TRIGger:SOURce

∙OUTPut:STATe

∙INITiate:CONTinuous

∙SCAN:MODE (not used)

∙SCAN:PORT (not used)

Recalling States The *RCL <numeric_state> command recalls a previously saved state. Enter the number (0-9) in the <numeric_state> parameter of the desired saved state. If *SAV was not previously executed using the selected number, the Microwave Switch will configure to the reset values.

Detecting Error Conditions

This section discusses using the various Microwave Switch registers to detect if a switching operation has generated an error. There are two general approaches to error checking. The simplest, but most time consuming, is to ask the instrument whether there are errors at every step of the switching process. This is called "polling" and is illustrated in the following example .

05 DIM Err_num$ [256]

10OUTPUT 70915; “CLOS(@100);:SYST:ERR?”

20ENTER 70915;Err_num$

30IF VAL (Err_num$) 0 THEN

40PRINT “Error”;Err_num$

50STOP

60END IF

70… (program continues)

The other approach involves the use of interrupts. The following program is a method of checking for errors using interrupts as you program the Microwave Switch. The program monitors the Microwave Switch’s Standard Event Status Register for an error condition. If no errors occur, the Microwave Switch functions as programmed. If errors do occur, the Microwave Switch interrupts the computer, and the error codes and messages are read from the error queue. This approach requires less checking, but is more complex.

Chapter 3

Using the HP E1368A/69A/70A Modules 43

Image 43

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 Common Command Format Command TypesScpi Command Format HP E1368A/69A/70A Command Reference Chapter Semicolon between the commands. For example ABORt Scpi Command ReferenceExample 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 Querying the Monitor Mode Example Enabling the Monitor Mode∙ Selecting the Module to be Monitored Use INITiate ∙ Stopping Continuous Scans See the ABORt commandExample Enabling Continuous Scans Example Query Continuous Scanning State OUTPut Example Query Trig Out Port Enable StateExample Enabling Trig Out Port ROUTe Example Closing Microwave Switch Channels∙ 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? SYSTemExample Reading the Error Queue Comments Microwave Switch Module Model NumberExample 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 RegistersReading the Registers Addressing 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