SBS = Straight Binary Seconds
The available options will vary according to the values of Format and Mod-
ulation 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.
Timescale: Used to select the time base for the incoming time code data. The
entered Timescale is used by the system to convert the time in the incoming data
stream to UTC time for use by the System Time. The available choices are:
UTC—Coordinated Universal Time ("temps universel coordonné"), also
referred to as ZULU time
TAI—Temps Atomique International
GPS—The raw GPS time as transmitted by the GNSS satellites (as of 15-
February-2021, this is 18 seconds ahead of UTC time).
A local clock set up through the Time Management Page—This option will
appear under the name of the local clock you have set up. See "Local Clock
(s), DST" on page179 for more information. Local timescale allows a Local
Clock to apply a time offset for Time Zone and DST correction.
Amplitude: The peak-to-peak output voltage level into a 600 Ω load is adjusted by
entering a digital control value in this field. The level adjustment has no effect on
TTL outputs, only on AM formats. The value of 128 will cause the Mark amplitude to
be about 5V
p-p
into high impedance. A value of 200 results in an output amplitude
of about 9V
p-p
into high impedance.
158
CHAPTER 2 • SecureSync 2400 User Manual Rev. 2
2.20 Configuring Outputs
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