XLi Time & Frequency System 9
XLi-man, Issue 8, 6/17/2008, Rev. H
2
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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 kΩ 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 kΩ, 50 Ω
Polarity: Positive or negative
Direction: Forward
Quantity: 1
Connector: Female BNC
Related Features
Propagation delay 0-99999 μS. 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 kΩ, 50 Ω
Polarity: Positive
Resolution: 5 nS, Single Shot
Accuracy
Refer to
“System Time & Frequency Accuracy” on page 6
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