Agilent Technologies N8201A Service Manual download pdf (Page 101)

Programming the Status Register System 4

Agilent N8211A/N8212A Performance Upconverter Synthetic Instrument Module, 250 kHz to 20 / 40 GHz 101

Status Register Bit Values

Each bit in a register is represented by a decimal value based on its location in the register

(see Tabl e 2 ).

• To enable a particular bit in a register, send its value with the SCPI command. Refer to

the N8211A/N8212A’s SCPI command listing at the end of this book for more

information.

• To enable more than one bit, send the sum of all the bits that you want to enable.

• To verify the bits set in a register, query the register.

Example: Enable a Register

To enable bit 0 and bit 6 of the Standard Event Status Group’s Event Register:

1 Add the decimal value of bit 0 (1) and the decimal value of bit 6 (64) to give a decimal

value of 65.

2 Send the sum with the command: *ESE 65.

Example: Query a Register

To query a register for a condition, send a SCPI query command. For example, if you want to

query the Standard Operation Status Group’s Condition Register, send the command:

STATus:OPERation:CONDition?

If bit 7, bit 3 and bit 2 in this register are set (bits = 1) then the query will return the decimal

value 140. The value represents the decimal values of bit 7, bit 3 and bit 2: 128 + 8 + 4 = 140.

Bit 15 is not used and is always set to zero.

Table 2 Status Register Bit Decimal Values

Decimal

Value

Always 0

16384

8192

4096

2048

1024

512

256

128

Bit Number 15 14 13 12 11 10 9876543210

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 331 332

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Agilent Technologies N8201A Service Manual Page 101