Ivie IE-35 RTA - Real Time Analysis - Manual (Page 36)

Ivie IE-33 & IE-35 Manual
page 36
Preference Menu, Scope & Sig. Gen.
Preferences Menu
The preferences menu (File>Preferences) provides access to a number of special selections and functions.
These are detailed below:
Diagnostics
Choosing Diagnostics provides a temporary setting (resets when the application is closed) that changes the
green/red box under the SPL window in the Main Display to show a numerical indication of the measurement
cycle time. The number represents the time required, in milliseconds, to complete a measurement cycle. The
Diagnostics setting is not normally displayed, but can help Technical Support Engineers to better support you if
you call the support center.
Power Average / Arithmetic Average
The IE-33 and the IE-35 will perform two types of averaging, depending on the type of measurement and prefer-
ence of the user. The default setting is "Arithmetic". Power Averaging is most useful when doing transmission
loss and other such measurements where an average of power rather than level is required. The equations for
each are shown on page 33 across the page.
Oscilloscope (Scope)
The Oscilloscope Function provides a single or dual channel (dual trace, or XY) audio frequency (20 Hz to
20 kHz) oscilloscope. Page 33, across, contains illustrations regarding control details. The oscilloscope is use-
ful in viewing wave forms of various signals. To use the oscilloscope function, the "Channel 1 (Line Level)" input
must be selected if a single channel oscilloscope measurement is desired. If a dual channel measurement is
required, the "Channel 1 & 2 Scope: XY/Dual Trace" inputs need to be selected. Input selection is done in the
following manner:
Input Select
The Input Select menu is located under the "File" pop-up menu. There are several inputs on the IE-33 and
IE-35 (a microphone connector and two RCA connectors). This selection area allows the user to select the
desired input or inputs. Remember that the IE-33 and IE-35 are two channel devices The microphone input
and Channel 1 line input are in parallel - both feed Channel 1.
The Channel 2 input is line level only.
Dual Trace or XY Measurements
When making dual channel measurements in the oscilloscope mode, either dual trace or XY measurements can
be selected using the "Options" pop-up menu.
Signal Generator
The IE-33 and IE-35 provide a simple signal generator. The output of the generator is available at the iPAQ, or
Axim, headphone jack, and the level of this signal is controlled by the audio level output control of the PDA (see
the iPAQ or Axim user instruction manual). Sine, Square, and Triangle wave forms can be selected, as can Pink
Noise and White Noise. The Main Display in this function shows the waveform of the selected signal type. See
page 33 across for software controls for the Signal Generator. In addition to the software slider, frequency can
also be selected with the iPAQ or Axim "joystick" left/right controls.
Do NOT plug the output of the iPAQ, or
Axim into a mic input that has phantom power active. The phantom power will blow your PDA output.