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5.4.2
Connector Menu
The Connector (CONNECTOR) menu only appears when
TYPE 188114 or TYPE RS449 is selected. This menu
controls the type of data interface which the FIREBERD can
be connected to. Modifying CONNECTOR causes a test
restart. Pressing the associated softkey selects either D-TYPE
or TWINAX.
D-TYPE -
When the D-TYPE softkey is pressed, the
interface is configured to use the RS-449/MIL188-114,
37-pin connector.
TWINAX -
When the TWINAX softkey is pressed, the
interface is configured to use the twinax connectors.
5.4.3
Emulate Menu
The Emulate (EMULATE) menu establishes the inter-
face emulation mode. Pressing the associated softkey selects
either DTE or DCE emulation. This menu does not appear
when the selected CONNECTOR is TWINAX.
DTE -
This selection allows the FIREBERD mainframe
to emulate DTE.
DCE-TT -
This selection allows the FIREBERD main-
frame to emulate DCE with Terminal Timing as the
timing reference that the mainframe synchronizes to. In
Terminal Timing the receiver timing source comes from
Pin 24 (EIA530/MIL188C) or Pin 17 (RS-449/MIL188-
114).
DCE-ST -
This selection allows the FIREBERD main-
frame to emulate DCE with Send Timing as the timing
reference that the mainframe synchronizes to. In Send
Timing the receiver timing source is the mainframe
generator clock that is sent out on Pin 15 (EIA530/
MIL188C) or Pin 5 (RS-449/MIL188-114).
5.4.4
Mode Menu
The Mode (MODE) menu allows the user to select
between balanced and unbalanced operation. Modifying
MODE causes a test restart.
BAL -
This selection allows the FIREBERD to operate in
a balanced mode. Balanced mode indicates that each
signal is transmitted on two leads in which the voltage is
equal in magnitude and opposite in polarity with respect
to a common reference. This mode is preferred when
minimum noise and cross talk is desired. When balanced
mode is selected the following menu is provided to set the
termination impedance. The termination impedance
should be set to match the characteristics of the cable.
IMPEDANCE -
This menu allows you to select either a
termination impedance of 78 ohms, 100 ohms, 124 ohms,
or UNTERM (>7.4 k ohms).
UNBAL -
This selection allows the FIREBERD to operate
in an unbalanced mode. In unbalanced mode each signal
is transmitted on one lead with respect to a common
ground.
5.4.5
Signaling Menu
TM:OFF|ON CTS:OFF|ON -
This menu only appears
when the mainframe is configured for D-TYPE CON-
NECTOR and DCE EMULATION. The operation of
TM (Test Mode) lead [Pin 25 (EIA530/MIL188C) or Pin
18 (RS-449/MIL188-114)] and the operation of the CTS
(Clear To Send) lead [Pin 5 (EIA530/MIL188C) or Pin 9
(RS-449/MIL188-114)] are controlled by this menu. Press
the TM softkey to toggle the TM lead ON and OFF. ON
equals a logic HIGH. OFF equals a logic LOW. Press the
CTS softkey to toggle the CTS lead ON and OFF. ON
equals a logic HIGH. OFF equals a logic LOW.
LL:OFF|ON RL:OFF|ON -
This menu only appears when
the mainframe is configured for D-TYPE CONNECTOR
and DTE EMULATION. The operation of the LL (Local
Loopback) lead [Pin 18 (EIA530/MIL188C) or Pin 10
(RS-449/MIL188-114)] and RL (Remote Loopback) lead
[Pin 21 (EIA530/MIL188C) or pin 18 (RS-449/MIL188-
114)] are controlled by this menu. Press the LL softkey
to toggle the LL lead ON and OFF. ON equals a logic
HIGH. OFF equals a logic LOW. Press the RL softkey
to toggle the RL lead ON and OFF. ON equals a logic
HIGH. OFF equals a logic LOW.
SIG:POS|NEG -
This menu only appears when the D-
TYPE CONNECTOR is selected. This menu controls the
polarity of all the interface signaling control leads. Press
the appropriate softkey to set SIG to POS (positive) or
NEG (negative) polarity. Selecting POS sets the ON
condition to a positive value and an OFF condition to a
negative value. Selecting NEG sets the ON condition to
a negative value and an OFF condition to a positive value.
5.5
FIREBERD 6000 ANALYSIS RESULTS
Table 5-1 lists the analysis results that are displayed when
the RS-449/530/MIL Data Interface is installed in the
FIREBERD 6000. Refer to the FIREBERD 6000 Reference
Manual for results definitions.
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