BMS F-16C/D 4.34, Flight Manual

Page: 98 / 234

T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 98
OSB #5 enters the FCR control page. The left and right rows of OSBs can set different options but
most of those are not implemented yet and are eye candy only. The exception is TGT HIS which sets
the number of toned down contacts you see after the main contact and Advanced IFF (AIFF)
CPL/DCPL adjacent to OSB 10. Selection couples the AIFF Interrogator FOV to the FCR FOV in the
AIFF scan mode. The control page is the same in both A-A and A-G FCR modes and is detailed in the
A-G FCR section further down this chapter.
OSB #6 is the IDM mode. It defaults to ASGN (Assign) but can be toggled to CONT (Continuous) or
DMD (Demand).
OSB #7, #8, #9 & #10 are labelled 1, 2, 3 and 4 and correspond to your flight members. These are
used to select a specific flight member to send IDM data to. Please refer to the IMPROVED DATA
MODEM chapter of the TO-BMS1F-16CM-34-1-1
for further information on A-A IDM.
The bottom row has the usual Direct Access buttons with DCLT on OSB #11 and SWAP on OSB #15.
OSB #17 is the bar scan and can be toggled from 1 bar to 4 bar.
The FCR scans the horizon by physically moving the antenna. The beam that the antenna normally
emits is not able to scan more than 4.9° in the vertical. So with this set to 1 the radar will scan just the
single 4.9° slice of airspace. Set to 2 the radar will scan 2 bars of airspace, set to four it will scan four
bars. It takes 2.5 seconds to scan one bar and another 0.5 seconds to move the antenna up and start
on the next bar, so a full 4 bar scan will take 12 seconds, whereas a 1 bar scan will take just 2.5
seconds. Obviously decreasing the bar scan will quicken the scan but will reduce the search area.
Regardless of the bar scan setting the radar can always be tilted up or down with the ANTENNA
elevation control on the throttle.
OSB #18 is the azimuth setting and toggles between a cone of 60° (A6), 30° (A3) and 10° (A1).
Blue vertical lines are drawn on the FCR to illustrate the reduced search area and it is displayed
similarly on the HSD. The obvious advantage is that the smaller the search area the quicker the scan
happens. The disadvantage is that it becomes easier to miss a contact that might be outside your
search area. When the azimuth is less than 60° the search area is slewable using the cursors.