Agilent Technologies Signal Analyzer N9030a - Manual (Page 61)

2 About the N9061A Measurement Application
General Rules and Limitations
Couplings
For optimal use of the X-Series instrument, N9061A uses the auto coupling features of the X-
Series, and does not attempt to mimic the exact coupling behavior of the legacy analyzers. To
eliminate the possibility of "Meas Uncal" errors between auto and manual values, values generally
default to the X-Series auto settings where applicable (for example, Resolution Bandwidth).
However, there are several exceptions, as follows:
To prevent timeout errors in the legacy code, the Resolution Bandwidth minimum matches the
minimum in the legacy analyzer. Resolution Bandwidth steps and resolution, however, conform to
X-Series values.
The Video Bandwidth couples to the Resolution Bandwidth according to the Video Bandwidth
coupling offset value, specified by the VBO or VBR command. X-Series instruments set the Video
Bandwidth according to the VBO or VBR setting, but use the X-Series instruments’ available
bandwidths, to prevent 'Meas Uncal' errors.
Markers
N9061A emulates the behavior of legacy products. If any program uses a marker state that is not
available in the legacy instrument, further marker behavior is undefined, until a subsequent
instrument preset occurs.
On systems that support MKACT, there are 4 completely different marker pairs, each with its own
information. N9061A stores the currently active value of MKACT. For example, if MKACT is 2, then
it uses Markers 3 and 4 instead of 1 and 2.
Numeric Ranges
Numeric ranges are limited to that of X-Series unless otherwise stated, although commands such
as FS or IP that go to a default range use the range of the legacy instrument.
Parsing
For 8566B and 8568B emulation, N9061A remembers the active function and supports UP, DN, and
OA
, all of which change the active function. It also supports ?, which does not change the active
function.
Note that 8566/68 parses a command (for example CF 10.3GZ) immediately when it recognizes a
complete command (in this example, following GZ), whereas N9061A parses at the end of a line,
when it sees the line termination sequence.
Predefined Functions
In the 8566/8568/8560 Series analyzers, a “Predefined Function” is a command that returns a
number that can be operated on by other commands. “Predefined Variables” follow the same
Remote Language Compatibility Measurement Application Reference 61