HP ESA-E Series Programmer's Manual page 55

The Questionable Status Frequency Condition Register contains the
following bits:
Figure 2-12
15 14
Bit Number
STATus:QUEStionable:FREQuency:CONDition?
Questionable
The Questionable Status Frequency condition register continuously
monitors output frequency status of the analyzer. Condition registers
are read-only. To query the condition register, send the command
Chapter 2
13 12 11 10 9
Status Frequency Condition Register
Bit Description
0 A 1 in this bit position indicates that the synthesizer in the source
(tracking generator) is unlocked.
1 A 1 in this bit position indicates that the analyzer frequency
reference is unlocked.
2,3 Reserved. These bits are not used by the analyzer, but are for future
use with other HP products.
4 A 1 in this bit position indicates that the analyzer synthesizer is
unlocked.
5 A 1 in this bit position indicates that an invalid bandwidth setting
has been requested.
6–8 Reserved. These bits are not used by the analyzer, but are for future
use with other HP products.
9–14 Unused. These bits are always set to 0.
15 Always Zero (0).
Using the Analyzer Status Registers
8 6 5 4 3 2 1 0
7
HP ESA Status Registers
ck772a
2-25