Specifications

Prism Media Products Limited AD-2 Dual-rate A/D converter
Operation Manual
Issue 0.2 © Prism Media Products Limited
11 August 1998 Page 30 of 58
4.8. System State Indicator LEDs
In general the LED indications are
quite self-explanatory but there are
some which deserve further
explanation.
4.8.1. Flashing LED indicators
In general a flashing indicator provides a warning of some desired condition which is
not attained or is not attainable.
Common examples are :
" Synchronization set to external WCK and none connected.
- This is a functional configuration an needs no adjustment unless the
application demands that an external sync be used. If so, connect one to
the WCK BNC input. The LED will stop flashing when the WCK signal is
detected correctly.
" An illegal configuration is requested using the menu controls.
- This could be a condition such as attempting to set Split96 for the AUX
output on the BNC output connectors. This is not possible. In this case
the Yellow “Link” led between the “BNC-1” and “BNC-2" LEDS will be
flashing.
In both cases, further explanation of the warning condition can be found using the Menu
controls. The LCD display will show three exclamation marks !!!. Pressing the [66] key
will reveal a warning condition. If there is more than one, they will be slowly cycled
through on the display until [66] is pressed again.
It is possible to go directly from the warnings display mode to the menu controls using
[99] or to the setup wizard using <Setup Wizard> or to the store system using one of
the <1> to <4> store buttons.