SRS Labs SR850 - Manual (Page 97)

4-15
SETTINGS & INPUT/OUTPUT MONITOR
The upper two lines of the screen are the monitor
display (see the screen on pg. 4-5). The lock-in
settings (sensitivity, time constant, etc.) or the
lock-in signal measurements (X, Y, R,
θ
, and the
Aux Inputs) may be monitored. Use the DISPLAY
menu to select the type of monitor (Settings or
Input/Output).
The Settings Monitor is shown above. The sensi-
tivity, dynamic reserve, time constant and roll-off
are always displayed. When the synchronous
output filter is selected AND the detection frequen-
cy is below 200 Hz, then Syncro will be displayed.
If the detection frequency is above 200 Hz, syn-
chronous filtering is not active and Syncro is not
displayed. When the external reference is below
10 Hz, the digital phase lock loop is active and
DigPll is displayed.
The input filters are shown when they are in, their
display boxes are empty when the corresponding
filter is out. The input coupling and type (A, A-B, or
I) are always shown.
The Input/Output Monitor is shown above. The
values of X, Y, R and
θ
are shown, regardless of
the trace definitions or displays chosen. In addi-
tion, the readings of the rear panel Aux Inputs are
displayed. These readings are updated a few
times a second.
MENU DISPLAY
The Soft Key menu boxes define the functions of
the 6 soft keys to the right of the screen. The menu
boxes are grouped into menus. Pressing each of
the ten Menu keys will display a different menu of
boxes. Related functions are grouped into a single
menu.
In general, pressing a soft key does one of two
things. One is to toggle between 2 or 3 specific
options. An example is the Filter Slope box illus-
trated on page 4-5. Pressing the fourth soft key
toggles the slope from 6 to 12 to 18 to 24 and back
to 6 dB/oct.
The second soft key mode is to highlight an entry
field and knob function. An example would be the
Phase Adjust. Pressing this soft key will highlight
the phase setting. The phase may then be adjust-
ed with the knob or entered as a value using the
numeric entry keys. Each menu is described at
length in a following section.
Full Scale = 10 mV
Dyn Reserve = 40 dB
100 mS
12 dB/oct Line 2xLin AC A
Syncro DigPll
X= 135.23 mV
Y= 22.78 mV
R= 137.14 mV A1= 0.000 V
A2= 0.000 V A3= 0.000 V
A4= 0.000 V
= 9.56 °
θ
Screen Display