Data Questionable Condition Register

Programming the Status Register System

Status Groups

The Data Questionable Condition Register continuously monitors the hardware and firmware status of the signal generator. Condition registers are read only.

Table 4-7 Data Questionable Condition Register Bits

Bit	Description

0, 1, 2	Unused. These bits are always set to 0.

3	Power (summary). This is a summary bit taken from the QUEStionable:POWer register. A 1 in this bit position
	indicates that one of the following may have happened: The ALC (Automatic Leveling Control) is unable to
	maintain a leveled RF output power (i.e., ALC is UNLEVELED), the reverse power protection circuit has been
	tripped. See the “Data Questionable Power Status Group” on page 168 for more information.

4	N5181A/82A/83A: ALC Heater Detector (COLD). A 1 in this bit position indicates that the ALC detector is
	cold.
	E4428C/38C, E8257D/67D, and E8663B: Temperature (OVEN COLD). A 1 in this bit position indicates that
	the internal reference oscillator (reference oven) is cold.

5	Frequency (summary). This is a summary bit taken from the QUEStionable:FREQuency register. A 1 in this bit
	position indicates that one of the following may have happened: synthesizer PLL unlocked, 10 MHz reference
	VCO PLL unlocked, 1 GHz reference unlocked, sampler, YO loop unlocked or baseband 1 unlocked. For more
	information, see the “Data Questionable Frequency Status Group” on page 171.

6	Unused. This bit is always set to 0.

7	Modulation (summary). This is a summary bit taken from the QUEStionable:MODulation register. A 1 in this
	bit position indicates that one of the following may have happened: modulation source 1 underrange,
	modulation source 1 overrange, modulation source 2 underrange, modulation source 2 overrange, or modulation
	uncalibrated. See the “Data Questionable Modulation Status Group” on page 174 for more information.

8ab	Calibration (summary). This is a summary bit taken from the QUEStionable:CALibration register. A 1 in this
	bit position indicates that one of the following may have happened: an error has occurred in the DCFM/DCΦM
	zero calibration, or an error has occurred in the I/Q calibration. See the “Data Questionable Calibration Status
	Group” on page 177 for more information.

9	Self Test. A 1 in this bit position indicates that a self- test has failed during power- up. Reset this bit by cycling
	the signal generator’s line power. *CLS will not clear this bit.

10, 11	Unused. These bits are always set to 0.

12c	BERT (summary). This is a summary bit taken from the QUEStionable:BERT register. A 1 in this bit position
	indicates that one of the following occurred: no BCH/TCH synchronization, no data change, no clock input,
	PRBS not synchronized, demod/DSP unlocked, or demod unleveled. See the “Data Questionable BERT Status
	Group” on page 180 for more information.

13, 14	Unused. These bits are always set to 0.

15	Always 0.

a.In the N5182A, this bit applies only to the I/Q calibration. In the N5181A/83A, this bit is unused and always set to 0. b.In the E8257D, and the E8663B this bit applies only to the DCFM/DCΦM calibration.

c.In the N5181A, N5182A, N5183A, E4428C, E8257D, E8267D, and the E8663B this bit is always set to 0.

Query: STATus:QUEStionable:CONDition?

166	Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide

N5183A, N5183A MXG, E8663B, N5181A/82A specifications

Agilent Technologies is renowned for its innovative solutions in electronic test and measurement equipment. Among its offerings are several signal generators including the N5181A, N5182A, E8663B, and N5183A MXG. These models are distinguished not only by their performance but also by their versatility across various applications in communications, aerospace, and electronics.

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Agilent Technologies N5181A/82A, N5183A MXG, E8663B manual Data Questionable Condition Register

Models: N5183A N5183A MXG E8663B N5181A/82A