CMU Audio Generator and Analyzer (Option CMU-B41)
1100.4903.12 4.89 E-10
Remote control
The settings are read out using the query corresponding to the setting command
(setting command with appended question mark).
Bar graph
The bar graph shows the AF level in dB at a maximum of 14 out of 20 different
audio frequencies corresponding to a continuous range of test tones configured in
the Tone Def. tab of the configuration menu (see p. 4.93 ff.). If a test tone is dis-
abled in the configuration menu, the corresponding bar is omitted.
Frequency axis
(abscissa)
The range of test tones (no. 1 to 14, 2 to 15 etc.) to be viewed can be selected via
the Display – Tone Scale hotkey (see p. 4.87). The bars representing the level of
the different tones are equidistantly distributed over the whole diagram width. This
optimizes the readability of the diagram but implies that the abscissa scale is not
necessarily linear. Therefore, the frequency and voltage of every single test tone is
displayed below the frequency axis.
Frequency re-
sponse axis (or-
dinate)
The ordinate can be arbitrarily scaled by setting a maximum and minimum value
(both in dB). With a fixed ordinate, the adjustable 0 dB reference line (see Level
Scale hotkey on p. 4.87) allows to shift the whole diagram vertically.
Remote control
READ:ARRay:MULTitone:AFxChannel? etc.
READ[:SCALar]:MULTitone:AFxChannel:TONE<nr>? etc. (x = 1,2)
Limit Check
The upper and lower limit lines for each test point defined in the Limit Lines tab of
the configuration menu (see p. 4.92) correspond to the two red step functions in the
diagram. If the result at a particular test point exceeds the upper limit (falls below
the lower limit), the corresponding section of the upper (lower) bar across the bot-
tom of the diagram turns red.
Remote control
CALCulate:ARRay:MULTitone:AFxChannel:MATChing:LIMit?
CALCulate[:SCALar]:MULTitone:AFxChannel:TONE<nr>:MATChing:
LIMit?
CALCulate[:SCALar]:MULTitone:AFxChannel:MATChing:LIMit?
(x = 1,2)
Measurement Configurations (Multitone Configuration)
The popup menu Multitone Configuration contains four tabs which determine the parameters of the
Multitone measurement including the error tolerances.
The popup menu Multitone Configuration is activated by pressing the main softkey (labeled AF Chan.
One or AF Chan. Two, depending of the application selected) in the measurement menu Multitone
twice. It is possible to change between the tabs by pressing the associated hotkeys.
Measurement Control (Multitone Configuration – Control)
The Control tab controls the Multitone measurement by determining
The Repetition mode
The Stop Condition for the measurement
The AC or DC input Path Coupling
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