User's Manual

UL-801 Installation Manual
Page 419
23-20-06 15 December 2011
2. VHF CONFIG
VHF CONFIG 1/2
RADIO TYPE
 NONE
 INTERNAL VDR
Internal VDR must be
selected if VHF is
configured to other than
NONE.
 ARINC 750 VDR
CONTACT TIMER
 ENABLED
 DISABLED
The contact timer verifies that the current VHF frequency is still usable when the channel has not had any uplink
traffic received for a period of time. Enabling this option provides better media management performance.
TRACKER TIMER
 ENABLED
 DISABLED
The tracker timer provides flight following information to the DSP. This setting is enabled by default to provide
better ACARS link management performance.
PREFERRED DSP
 NONE
 ARINC  SITA  AVICOM
NOTE: Although the Preferred DSP is selected with this option, the ARINC, SITA, and AVICOM options may
also be enabled/disabled using the listed options. For further coverage information, contact your DSP.
ARINC
 ENABLED  DISABLED
SITA
 ENABLED  DISABLED
AVICOM
 ENABLED  DISABLED
Press NEXT. VHF CONFIG 2/2 displays.
ENABLED MODE(S)
 POA/AOA
 AOA ONLY  POA ONLY
MINIMUM SQP
(Minimum VHF Signal
Quality)
Range is 3 – 15; 4
SQP THRESHOLD
Range is 3 – 15; 12
VOICE FREQ CONTROL
 ENABLED 25KHZ  ENABLED 8.33/25KHZ  DISABLED
VOICE FREQ CONTROL must
be set to DISABLED for the
UniLink 801.