Agilent Technologies N8201A Service Manual download pdf (Page 105)

Programming the Status Register System 4

Agilent N8211A/N8212A Performance Upconverter Synthetic Instrument Module, 250 kHz to 20 / 40 GHz 105

If the status register is configured to SRQ on end-of-sweep or measurement and the mode

set to continuous, restarting the measurement (INIT command) can cause the measuring

bit to pulse low. This causes an SRQ when you have not actually reached the

“end-of-sweep” or measurement condition. To avoid this, do the following:

1 Send the command INITiate:CONTinuous OFF.

2 Set/enable the status registers.

3 Restart the measurement (send INIT).

Status Register SCPI Commands

Most monitoring of N8211A/N8212A conditions is done at the highest level using the IEEE

488.2 common commands listed below. You can set and query individual status registers

using the commands in the STATus subsystem.

*CLS (clear status) clears the Status Byte Register by emptying the error queue and

clearing all the event registers.

*ESE, *ESE? (event status enable) sets and queries the bits in the Standard Event

Enable Register which is part of the Standard Event Status Group.

*ESR? (event status register) queries and clears the Standard Event Status Register

which is part of the Standard Event Status Group.

*OPC, *OPC? (operation complete) sets bit #0 in the Standard Event Status Register

to 1 when all commands have completed. The query stops any new commands from

being processed until the current processing is complete, then returns a 1.

*PSC, *PSC? (power-on state clear) sets the power-on state so that it clears the

Service Request Enable Register, the Standard Event Status Enable Register, and

device-specific event enable registers at power on. The query returns the flag setting

from the *PSC command.

*SRE, *SRE? (service request enable) sets and queries the value of the Service

Request Enable Register.

*STB? (status byte) queries the value of the Status Byte Register without erasing its

contents.

:STATus:PRESet presets all transition filters, non-IEEE 488.2 enable registers, and

error/event queue enable registers. (Refer to Table 3.)

Table 3 Effects of :STATus:PRESet

:STATus:PRESet

:STATus:OPERation:ENABle 0

:STATus:OPERation:NTRansition 0

:STATus:OPERation:PTRransition 32767

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 331 332

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Agilent Technologies N8201A Service Manual Page 105