User manual

Digital Interface Tester
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AM700 Audio Measurement Set User Manual
BNC Output. Specifies the output voltage of the digital BNC connector. This is
constrained to always be five times smaller than the XLR output voltage. Adjusting
this field also adjusts the XLR output voltage. Range of the BNC output is 0.00 V to
2.05 V (one-fifth of the XLR output).
These selections are used to control the generator. The choices are sine wave,
jittered sine wave, jitter amplitude, and jitter frequency. The choice of Long Cable
Simulator is also one of the available selection in this menu.
Generate Sine. This button is exactly equivalent to entering the Generator Control
panel and selecting Sine for the Digital Generator SF 1 output, and Follow A for the
Digital Generator SF 2 output. It is provided here as a convenience.
Generate Jittered Sine. This button is exactly equivalent to entering the Generator
Control panel and selecting Jittered Sine for the Digital Generator SF 1 output, and
Follow A for the Digital Generator SF 2 output. It is provided here as a conve-
nience.
Jitter Ampl. Configures the amplitude of the jitter applied to the jittered sine wave.
The useful amplitude limit at the high-frequency limit is approximately 0.5 Unit
Intervals for testing though the AM700 tolerates higher level of jitter without losing
lock. When the jitter becomes excessive, the measurement becomes unlocked and a
message is displayed to that effect.
Jitter Freq. Specifies the frequency (in Hz) of the jitter applied to the jittered sine
wave. The useful high-frequency limit is approximately 50 kHz.
NOTE. It is possible to set a combination of jitter amplitude and jitter frequency that
causes the Digital Interface Tester to go in and out of lock. That condition indicates
that the applied signal is at the detection threshold of the AM700.
Long Cable Simulator. When selected, applies the long cable simulator to the
generated digital output. Degradation of the signal is used to test the ability of a
device under test to handle such conditions in an installed system.
Jitter
Generation