Unmodulated IRIG-B
From the Home screen DISPLAY menu, press the button of the
signal you wish to view.
INPUT 1 IRIG-B UNMODULATED
Time: 00:55:46 UTC
Date: 01 JUL 2015
DOY: 182
SBS:3346
Time Offset: 0
TQ: Locked
CTQ: <100ns
LSP: 0 LSD: 0
DSP: 0 DST: 0
PARITY: EVEN
Jitter: 0.47 uS, 0.1 RMS
In1 - In2 Delta T: ---.- uSecs
Amplitude: 4.1 Volts
Year(15)
Offset(0)
TQ(6)
20
40
80
P
6
LSP
DSP DST SIGN
1
2
4
8
LSD
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
100% H
Figure 24: Unmodulated IRIG-B Display
The lower portion of Figure 24 graphically illustrates a part of the
unmodulated IRIG-B signal: view adjusted using the slider.
•
Time/Date:
UTC time; date; Day of Year; Straight Binary
Seconds (SBS); Time offset; IEEE 1344: ON or OFF.
•
Time quality (TQ):
Continuous Time Quality (CTQ);
Leap Second Pending (LSP); Daylight Saving change Pending
(DSP).
•
Jitter, or Pulse Jitter:
Two values measured and dis-
played: average jitter and rms jitter. Acceptable jitter de-
pends on your requirement. See Figure 25.
•
In1 - In2 Delta T:
Time difference between the 1 PPS
signals at Input 1 and Input 2.
•
Signal amplitude:
Shown in Volts.
28
Summary of Contents for 940A
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