T6-D-USER-RV-EN
Page vi
© Park Air Systems Limited 2017
J4 LINK cable
Do not use a standard CAT 6 cable to connect a pair of radios’ LINK connectors. The white J4 LINK
cable is a non-standard cable and must be used. It connects a pair of radios configured for automatic
ACTIVE/INACTIVE control with the Park Air J4-4WEMSWITCH. Only pins 3 and 7 are connected.
Frequency counter accuracy
Make sure the stability, accuracy and resolution specifications of the frequency counter used exceed
that of the reference oscillator. Wherever possible, use an external frequency standard, for example,
GPS or an off-air standard.