Status Indicators; Module Status Leds; Dot-Matrix Display; 4.2.1. Audio Level Bar Graphs - evertz 7700 Series Manual

7700 MultiFrame Manual
7720ADC-A4-(B) Quad Analog Audio to Dual AES Converter
4.

STATUS INDICATORS

The 7720ADC-A4 has 2 LED Status indicators and a 4 digit alphanumeric display on the front card edge to
show operational status of the card at a glance. The card edge pushbutton is used to select various
displays on the alphanumeric display. The location of the status LEDs is shown in Figure 6-1.
4.1.

MODULE STATUS LEDS

This Green LED will be On when the module is operating properly.
MODULE OK:
This Red LED makes it easy to identify one module in a frame that is missing an
LOCAL FAULT:
essential input or has another fault.
The LED will blink on and off if the microprocessor is not running.
The LED will be on solid when there is a fault in the module power supply.
4.2.

DOT-MATRIX DISPLAY

Additional signal and status monitoring is provided via the 4-digit dot-matrix display located on the card
edge. The rotary switch position determines what is displayed on the dot matrix display. When it is set to
position 0, the input audio levels are shown using bar graphs on the display. Pushing the toggle switch up
when the rotary switch is in position 0 will orient the display vertically; pushing the toggle switch down will
orient the display horizontally. When it is set from 1 to 4 the gain level for each of the channels will be
displayed, and can be set using the toggle switch (see section 5.1.1).

4.2.1. Audio Level Bar Graphs

When the rotary switch is set to position 0, each section of the dot matrix display shows a bar graph
representation of the level for one of the audio channels. Channel 1 is shown on the left (top) section and
channel 4 is shown on the right (bottom) section. Each section of the display is comprised of a 5 x 5 array
of dots. Diagonal rows of dots represent one of 9 different signal levels as shown below.
Level 1 Level 2
7720ADC-A4-(B)-6
Level 3 Level 4

Figure 4-1: Bar Graph Displays

Revision 1.2
Level 5 Level 6 Level 7 Level 8 Level 9