Technical data

Agilent Signal Generators Programming Guide 187
Programming the Status Register System
Status Groups
Table 4-8 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 189 for more information.
4 N5161A/62A/81A/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 192.
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 195 for more information.
8
ab
a.In the N5162A/82A, this bit applies only to the I/Q calibration. In the N5161A/81A/83A, this bit is unused and always set to 0.
b.In the E8257D, E8663B, and the E8663D, this bit applies only to the DCFM/DCΦM calibration.
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 198 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.
12
c
c.In the N5161A/81A, N5162A/82A, N5183A, E4428C, E8257D, E8267D, E8663B, and the E8663D, this bit is always set to 0.
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 201 for more information.
13, 14 Unused. These bits are always set to 0.
15 Always 0.
Query: STATus:QUEStionable:CONDition?
Response: The decimal sum of the bits set to 1
Example: The decimal value 520 is returned. The decimal sum = 512 (bit 9) + 8 (bit 3).