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XLi Time & Frequency System
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XLi-man, Issue 8, 6/17/2008, Rev. H
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J1 Input – Time Code or Time Interval - Event Time
Time Code Input Specifications - Modulated (AM) and Demodulated (DC):
The Time Interval - Event Time (TIET) option measures a 1 PPS or Event input signal on J1 against the
XLi derived time. The rising edge of the pulse is measured against XLi time with 5 nS resolution.
See “F110 – J1 Input (Time Code, TIET)” on page 137.
Note:
Any stray input capacitance loading will impact TIET measurements
Format:
IRIG-B120, B000, B120 1344, B000 1344
IRIG-A130, A000
NASA 36
Amplitude (AM):
0.5 Vp-p to 10 Vp-p, 100 k
Ω
to ground
Ratio (AM):
3:1
±
10%
Amplitude (DC):
Logic Low:
Logic Hi:
< 1.25V and Min. 300mV
> 1.25V and Max 10V
Impedance:
100 k
Ω
, 50
Ω
Polarity:
Positive or negative
Direction:
Forward
Quantity:
1
Connector:
Female BNC
Related Features
Propagation delay 0-99999
μ
S. Error bypass. (See F110 on
page 137
)
Pulse Width
100 nS, min.
Active Edge:
Rising
Amplitude (DC):
Logic Low:
Logic Hi:
< 1.25V and Min. 300mV
> 1.25V and Max 10V
Impedance:
100 k
Ω
, 50
Ω
Polarity:
Positive
Resolution:
5 nS, Single Shot
Accuracy
Refer to
“System Time & Frequency Accuracy” on page 6
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