"Local Clock(s), DST" on page199). 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 oscil-
loscope 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.
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 page587.
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 win-
dow:
SecureSync 2400 User Manual 539
APPENDIX
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