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.
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 latencies in the
IRIG input. The Offset value is entered and displayed in nanoseconds (ns). The avail-
able Offset range is -500 to +500 ms.
Each IRIG code specifies a carrier frequency that is modulated to encode date and time, as
well as control bits to time-stamp events. Initially, IRIG applications were primarily military
and government associated. Today, IRIG is commonly used to synchronize voice loggers,
recall recorders, and sequential event loggers found in emergency dispatch centers and
power utilities.
For more information on IRIG frequency and output specifications, see "IRIG Standards
and Specifications" on page546.
Configuring an ASCII Time Code Output (RS-232 or RS-485)
Note: The process of configuring the ASCII Time Code output is inde-
pendent of the communications protocol.
Via INTERFACES > OUTPUTS [or: INTERFACES > OPTION CARDS], navigate to the
ASCII Output you want to configure. Depending on which path you take, you will need to
click the GEAR button, or Edit button in order to open the Edit window:
SecureSync 2400 User Manual 499
APPENDIX
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