GXD8 Operational Manual
Rev 1.0
Meters and Input Level
Genex Research Limited
Page 9
Meters and Input Level
Eight high resolution peak power meters (PPMs), one for each channel, are provided. Four buttons
are provided to configure the meters.
Peak Hold
The meters default to peak hold
on
on power-up. The peak value of any signal will be held until the
CLEAR PEAK HOLD
button is pressed.
With peak hold
delay
, each peak value is held for approximately 2 seconds or until the
CLEAR PEAK
HOLD
button is pressed.
With peak hold set to off (both indicators off) no peak values will be held.
The
OVER
LEDs will always light when an over condition is detected. Setting peak hold to off or delay
has no effect. They can only be cleared down by pressing
CLEAR PEAK HOLD
.
Fine PPM
This function changes the resolution and display style of the PPMs. The range of the PPMs changes
to ±1dB centred around –12dBFS, -14dBFS, -16dBFS, -18dBFS or -20dBFS.
Over Sensitivity
This allows the number of adjacent “over” samples that are must be detected before the
OVER
LEDs
are lit to be set from between one to six.
Output Gain Level
Below each PPM is a trim position to set up the input level for each channel. The output gain range is
from –10dBu to +4dBu (for a –18dBFS input level). Therefore for full-scale (0dBFS) the GXD8 can
output from +8dBu to +22dBu.
