Wheatstone FM-531 HD, Technical Manual

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FM-531HD / May 2013
F M - 5 3 1 H D G U R U G U I
Analog Gain
The Analog audio input gain may be adjusted by clicking on the Analog Gain knob
and dragging the mouse or touchpad to the right or left. The Analog Gain can be adjusted
over a range of +12dB to ‑36dB.
Digital Gain
The AES/EBU Digital audio input gain can be adjusted by clicking on the Digital
Gain knob and dragging the mouse or touchpad to the right or left. The AES Gain can be
adjusted over a range of +12dB to ‑36dB.
L/R Balance
Static level errors in Left/Right channel balance can be corrected by using the
L/R Balance knob and may be adjusted over a +/‑ 12dB range. The L/R Balance control
is common to both the analog and AES/EBU digital inputs.
Output Menu
This is the second tab from the left on the top of the GUI. (Note: the screen that is
currently being displayed is indicated by a red background on the selection tab).
Note that the smallest increment of delay time adjustment is 100 microseconds.
COARSE ADJUST SLIDER FINE ADJUST SLIDER
Slider only 500 mS Slider only 0.9 mS
Slider plus Shift key 1700 mS Slider plus Shift key 8.6 mS
Slider plus Ctrl key 50 mS Slider plus Ctrl key 0.1 mS (100µSec)
The Output Configuration screen contains controls for selecting the Analog Output
Type, setting the FM Diversity Delay time, and for setting the FM Digital Output and
HD Outputs levels.
For best resolution of the Diversity Delay controls they are best adjusted using the
host PC’s keyboard and mouse and using the following table as a guide.
FM‑531HD is also equipped with our Wheatstone® baseband192 digital composite
interface which provides a direct, pure digital signal path between the components of the
stereo multiplex spectrum and the associated transmitter’s digital FM modulator. With this
interface the usual A to D and D to A and/or sample rate conversions are absent resulting
in virtually perfect stereo baseband and modulation performance.