Spectracom TSync-PCIe - External 1 PPS Input; 1 PPS Output; Table 3-1: 10-Mhz Output Specifications

TCXO OCXO
@1Hz — –85
@10Hz — –113
@100Hz –110 –120
@1KHz –135 –140
@10KHz –140 –150
Signal wave form & levels:
+13 dBm into 50 ohm, ±3dB
Table 3-1:
10-MHz output specifications
3.8 External 1PPS Input
External 1PPS reference input to timing connector
1Hz pulse, rising edge or falling edge active (selectable)
100nsec. minimum pulse width
0V to +5.5V input range, +0.8V
VIL
, +2.0V
VIH
Input impedance <150pF capacitive
3.9 1PPS Output
1PPS output at timing interface connector
1 Hz pulse, rising edge or falling edge active (selectable)
40 ns to 900 ms active pulse width (selectable, 200 ms default)
Rise time: <10 ns
Signal level: TTL compatible, 4.3V
min
, base-to-peak into 50ohms
Accuracy:
Positive edge within ±50 nanoseconds of UTC when locked to a valid 1PPS input
reference
TCXO OCXO
Accuracy to UTC
(1-sigma locked to GPS)
±50 ns ±50 ns
Holdover
(constant temp after 2 weeks of GNSS lock)
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CHAPTER 3 • Instruction Manual XYZ Rev. R
3.8 External 1PPS Input