User manual

Appendix A: Specifications
A-50
AM700 Audio Measurement Set User Manual
Table A-24: Digital Interface Tester (Cont.)
Capabilities Description
Eye Diagram Displays a “cloud of dots” representing an equiva-
lent-time sampled time-domain graph of the
digital main inputs. The following seven numeric
readouts are displayed above the diagram in a
real-time readout box (when measurements are
available for the category):
Measured sample frequency on the main input
Measured sample frequency on the reference
input
Measured ratio between the main and reference
sample frequencies
Phase difference between the main and
reference
Voltage level of the main input
Equalization applied to the main input
Peak-to-peak jitter of the interface
Jitter Spectrum Displays the energy spectrum of the jitter on the
digital main input signal. Like FFT, this spectrum
can be viewed as an interpolated graph, a bar
graph, or a spectrogram.
Averaging is available (exponential averaging,
min hold, and max hold) in the jitter spectrum
display. Averaging is not available in the other
displays.
Enhanced Stimuli Within this application, the DIT menu choices
provide extra features for controlling the digital
generator.
Electrical interface modifications include:
Cable Simulator
Jitter Generation with Controlled Frequency and
Amplitude