(4) Teletype, TTY/FSK patch panel. The
with this panel. Appearances on the data patch panel
include timing signals from modems, KG-81, and
TTY/FSK patch panel provides interconnection and
AN/FCC-98, in addition to data lines from appropriate
circuit routing for:
(a) FSK connection of the four keyer/
(3) Teletype, TTY/low level patch panel. The
(b) Five user FSK circuits.
TTY/low level patch panel provides interconnection and
circuit routing facilities for:
These nine FSK circuits can be routed through any of the
(a) Four user low level circuits.
nine available filter bridge channels. Three trunk circuits
(b) Low level connections of the three
are provided between the TTY/FSK and the VF patch
line isolator units (LIU).
panels for use when priority TTY/FSK traffic has to be
(c) On-board TTY machine.
routed directly through to an available MUX VF channel.
(d) Access for AJ modem (future).
Jacks used are identical to those used in the VF patch
(5) IF patch panel. The IF patch panel,
Any combination of four of the above circuits can be
patched to the four keyer/converters. Six trunk circuits
provides the major interface between CSS and RSS
between the TTY/low level and data patch panels are
equipments. Coaxial jacks terminate all IF signal ports
provided for use when priority TTY traffic has to be
from the various equipments, including the auxiliary IF
routed directly through to an available MUX low data rate
channel. Cut-key switches are provided for placing both
STANDARD/TELEPHONE signal entry panel. The IF
the up-link transmit and user receive loops in a mark-
patch panel layout is illustrated in figure 6-8, and is
hold condition for fault isolation or operator system
designed to facilitate the use of looping plugs. A 20-dB
Jacks for circuit polarity reversal,
coupler is in series with each upconverter and
paralleling and series patching are provided. In addition,
positive and negative ( 6 Vdc) battery connections are
downconverter appearance. The secondary line on each
coupler is routed to a monitor jack on the panel.
provided for circuit test purposes. Jacks are identical to
Signals from the monitor appearances can be patched to
those used in the VF patch panel.
the spectrum analyzer or the C/N test set input terminals
which also appear on the IF patch panel.