GPS—The raw GPS time as transmitted by the GNSS satellites (as of
22-August-2023, 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 page199 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 adjust-
ment 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 imped-
ance.
Note: These are nominal values only. Actual values will vary from unit
to unit. To adjust the level precisely, connect an oscilloscope to the
output connector when adjusting.
Offset: Provides the ability to account for IRIG cable delays or other laten-
cies in the IRIG input. The Offset value is entered and displayed in nano-
seconds (ns). The available Offset range is -500 to +500 ms.
For IRIG frequency and output specifications, see "IRIG Standards and Spe-
cifications" on page587.
IRIG Output: Status Window
To view the current settings of one of the IRIG Outputs, go to its Status window.
For instructions, see: "Viewing Input/Output Configuration Settings" on
page363.
The Web UI list entries for these cards are: IRIG In/Out BNC and IRIG In/Out
Fiber. The connector numbers are: J2 and J3.
452 SecureSync 2400 User Manual
APPENDIX
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