5
generally not happen with an input unless the unit has been configured for unbalanced operation.
If this is the case, try the balanced input mode of operation. If a ground loop is present between
the CDS-300 and an exciter or STL, feed the CDS-300 to a balanced input. Most modern exciters
accommodate balanced cables.
As shipped from the factory, the CDS-300 is adjusted to produce unity gain from input to output.
It may be necessary to adjust levels as some exciters can require slightly different levels to
produce 100% modulation. Simply adjust the front panel controls for suitable modulation on each
exciter.
D. Remote Control/Status Connection
Refer to the table below for remote control and status connections. The CDS-300 requires a
momentary ground closure for switching operation. The CDS-300 can accept an open collector
output for this purpose or a simple relay closure will actuate a switching function. Status provided
is a set of dry contacts offering NO/C/NC connection to remote control equipment.
Remote Control Status Table
Pin 1 Error Status NO
Pin 2 Error Status Common
Pin 3 Select B Input
Pin 4 Select A Input
Pin 5 Error Reset
Pin 6 Input Status Common
Pin 7 Input Status B NO
Pin 8 Input Status A NO
Pin 9 Ground
Momentary connection between pins 3,4 and Ground pin 9 activates switching function remotely.
All status connections are dry contact.
