Boonton 4540 Peak Power Meter User Manual Manuale Utente Scaricare il pdf (Pagina 141)

Boonton 4540 Series RF Power Meter

Remote Operation

5-7

*ESR?

Description: Return the current value of the Standard Event Status Register, then clear the register. This register

has bits assigned to a number of possible events or conditions of the instrument. When the event

occurs, the corresponding bit is latched. The register value is read using this command.

Individual bits may be enabled or disabled for SRQ generation using the ESE mask (see *ESE

command). The following table shows the bit assignments in the Standard Event Status Register:

Bit Value Definition

0 1 Operation Complete Flag 1 = all current operations have completed execution.

1 2 Not used

2 4 Not used

3 8 Device Dependent Error 1 = the instrument encountered a device dependent error.

4 16 Not used always returns 0

5 32 Command Error 1 = a remote interface command error exists.

6 64 Not used always returns 0

7 128 Not used always returns 0

Syntax: *ESR?

Returns: Current Value of Event Status Register (0 to 255)

Valid Modes: Any

*IDN?

Description: Return the instrument identification string. This string contains the manufacturer, model number,

serial number and firmware version number.

Syntax: *IDN?

Returns: < Mfgr, Model#, Serial#, Version# >

Valid Modes: Any

*OPC

Description: Clears the OPC (Operation Complete) status flag. This command is issued before the command to

be checked for completion. After this, the flag may be queried by *OPC? until a value of one is

returned, indicating the command has completed. Note that the query is not a true query - a value

of zero will never be returned.

Syntax: *OPC

Argument: None

Valid Modes: Any

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Boonton 4540 Peak Power Meter User Manual Manuale Utente Pagina 141