IRIG G
NASA-36
Modulation Type: Configures the type of input signal modulation. The choices are:
IRIG DCLS—A TTL (Phase) modulated signal.
Frequency: The IRIG modulation frequency. This is determined by the configuration
of Format and Modulation Type. See "IRIG Carrier Frequencies" on page546 for
details.
Coded Expression—Defines the data structure of the IRIG signal, where:
BCD = Binary Coded Decimal
TOY = Time of Year
CF = Control Field
SBS = Straight Binary Seconds
The available options will vary according to the configurations of Format and
Modulation Type.
Control Function Field: IRIG signals have an optional section in the data stream
that can be used to include additional information (such as the present year, for
example). This field allows the Control Field section of the IRIG output to be defined.
The available configurations are:
Fields conform to RCC 200-04: IRIG spec 200-04 specified a location for
year value, if included in this field.
Fields conform to IEEC 37.118-2005 (IEEE 1344): Control Field contains
year, leap second and daylight savings time information.
Fields conform to Spectracom Format: Year is included in Control Field but
not in the same location as RCC-2004 output (year is offset by one position).
Fields conform to Spectracom FAA Format: A unique IRIG output Control
Field that contains satellite lock status and time error flags.
Fields conform to NASA Formats: Variants of IRIG B
Fields confirm to Spectracom IEEE C37.118-2005: Has been extended to
support one-month leap second notification
The available options will vary according to the configurations of Format and Mod-
ulation Type.
2.19 Configuring Input References
CHAPTER 2 • SecureSync 2400 User Manual Rev. 2
147
To Next Page
Loading...
Need help?
General
