Honeywell SPZ-8000 Maintenance Manual page 183

A grid/open remote tune inhibit discrete is output at pin
J1-GG. When toggled, this discrete shall
be GND for 500 t 50
msec and then return to open state. This discrete toggles
when the on side MLS
is exited.
This discrete is
used to
force the gables NAV
control head to tune the DME in a
continuous label stream rather than
in a burst tune
mode.
This will allow the DME to be retuned when moving from NAV
tuning source to
MLS
tuning source, and then back to NAV,
upon
the
return to NAV.
If this were not done, the DME would not
be returned by the NAV (burst tune only tunes on initial
frequency selection) and an "F" could be displayed on the NAV
control head.
NAV Mode Menu
Figure 6-22.1 shows the NAV mode menu when the optional MLS
is installed. Alternate activation of the left No. 3 line
select key moves the box between the 1 and 2 selections of
the
MLS source. On the pilot's
side the first push of the
key boxes the 1 and on the copilot's
side the 2 is boxed.
Preview Mode Submenu
Figure 6-22.2 shows the preview
mode submenu with MLS. The
left No. 4 line select key is used to select the MLS source
as follows:
. First, push boxes MLS 1 (pilot's side) or MLS 2
(copilot's side)
. Second, push boxes MLS 2 (pilot's side) or MLS 1
(copilot's side)
c Third, push removes the box from MLS 1 or 2.
Selection of any other source (NAV or FMS) causes the MLS
source to be unboxed and deselected.
The selection of the #2 NAV
source and preview NAV
source
first on the copilot side is a product enhancement
unassociated with MLS
integration.
It simply allows the
copilot to select his on-sic NAV/preview source with a
single key stroke rather than double clicking the line
select key, as is presently required.
The course set window on the NAV preview paqe will be
.-
removed while MLS is selected. -
22-14-00
Page 196.2
Apr 15/93
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