Operations Manual
LE3000S
11
Test Tone Screen
FREQUENCY: 1000 Hz
LEVEL: -20 dB L+R
This screen allows the user to replace the audio with high quality test tones. A tone (sine wave) may be
fed to the left (L,-) or right (-,R) channel or both (L+R). Tone frequency and amplitude are user
programmable and changeable during operation.
In test tone mode, the Model 3000S checks the output frequency setting under the main screen. The test
tone data rate will be locked to the input data frequency when output sample rate is set to BYPASS. The
Model 3000S becomes a “stand alone” test tone generator (ignoring input data) when the output
frequency is set to an internal crystal (44100, 48000, 88200 or 96000). In all cases, the test tone
transmission includes all present data settings in display mode.
Setting Test Tones
Note:
press and hold cursor button for faster increase or decrease in frequency or level.
Frequency settings
: using the
CURSOR
buttons the tone frequency may be selected in 1 Hz increments
between 1 Hz and 20000 Hz. 88.2 kHz sample rate mode is limited to 43000 Hz. 96 kHz sample rate
mode is limited to 46000 Hz
Level settings
: using the
CURSOR
buttons the tone amplitude may be selected in 1 dB increments
between 0 dB (full scale) and -120 dB. An additional step below -120 dB, indicated by “OFF” on the
display, outputs digital black (all zero bits). Lower level tones are offered for testing of higher resolution
equipment. The digital black "OFF" setting may be useful in applications ranging from listening to system
noise, detection of DC offsets and dither, etc.
Delay Screen
DELAY: ON 1.0 FRAMES
1664 SAMPLES 48002 HZ
This screen allows the user to control a digital delay feature. Delay is programmable from a minimum
value of 384 samples to 10 frames, in 0.1 frame increments. Frames are calculated at 30 fps. The output
frequency as measured is indicated at the lower right of the screen. The output frequency is updated when
the screen is entered.
The Delay function is not available at 88.2 kHz or 96 kHz outputs settings.
Summary of Contents for 3000S
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