11 Display
The Display menu allows the user to monitor the system
status and performance.
11.1 Display: Output meters
The output meters screen shows important output signal
information for the amplifier.
By pressing the right most front panel button, the screen
view is toggled between information relative to channel 1,
channel 2 or relative to the sum of channels 1 and 2.
11.3 Display: Mains meters
This screen displays the updated mains RMS voltage and
RMS current levels. Values are displayed in numbers and as
progress bars.
The current and voltage levels displayed in this screen are
approximate values: which serve the purpose of giving a
general indication of the mains levels. Please refer to other
sources (such as calibrated multimeters) for reliable and
exact mains voltage and current measurements.
The top line in this screen displays the RMS voltage value of
the output, both as a number as well as a horizontal meter
bar. The second and third line display the output RMS cur-
rent and power level respectively. The output power reported
is a peak value reading taken every 200ms.
In the “C1+2” mode, the RMS voltage and power readings
displayed are the average RMS voltage and peak power of
each channel. The RMS current value, on the other hand, is
the sum of each single channel’s RMS current level.
The bottom line of the screen displays the load impedance
as Zload. The minimum output voltage is stored internally
and available to remote clients connected to the amplifier.
The load impedance is indirectly inferred by a successive
approximations. Time between single output impedance ap-
proximations depends on the output signal: the greater the
amplitude of the signal, the shorter the time interval between
measurements needed to approximate the output imped-
ance, the faster the successive approximation method will
converge to the true impedance value.
11.2 Display: Temperature
This screen displays the current amplifier temperature.
11.4 Display: Amplifier name
The Amplifier Name menu gives access to two menu
branches: the “Display amp data” function and the “Edit
amplifier name” menu.
When the “Display Amp data” function is activated, the main
amplifier screen shows the amplifier name (20 characters,
bold) blinking to a second screen showing the current se-
lected preset name (40 characters). If the preset has been
altered in any way, the displayed preset name will have a
“Modified” prefix to indicate this.
The amplifier name can be assigned by entering the “Edit
amplifier name” menu.
back
Zload=8.0
C1+2
70 Vrms
9 Arms
630 Watt
FIGURE 46: Display: Output meters.
Mains meters
back
170 Vrms
20 Arms
FIGURE 47: Display: Mains meters.
Bias Series User Guide V1.0
Page 32
