J1 input - time interval - event time, J2 output - rate out, J1 input – time interval - event time – Symmetricom XLi IEEE 1588 User Manual

Page 20: J2 output – rate out, System time & frequency accuracy” on page 10

XLi IEEE 1588 Clock

997-01510-03, Rev. C, 12/12/2006

J1 Input – Time Interval - Event Time

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 (TIET)” on page 99.

Note:

Any stray input capacitance loading will impact TIET measurements

Note:

Configuring J1 as the input for a time code reference source is not supported.

J2 Output – Rate Out

See “F111 – J2 Output (Rate)” on page 102.

Note:

Configuring J2 as a Programmable Pulse Output (PPO) is not supported.

Pulse Width

100 ns, min.

Active Edge:

Rising

Amplitude (DC):

Logic Low:

< 1.25V and Min. 300mV

Logic Hi:

>1.25V and Max 10V

Impedance:

100 k

Ω, 50 Ω

Resolution:

5 ns, Single Shot

Accuracy

Refer to

“System Time & Frequency Accuracy” on page 10

Rate:

1 PPS, 10 PPS, 100 PPS, 1 kPPS, 10 kPPS, 100 kPPS, 1 MPPS, 5
MPPS, 10 MPPS

Duty cycle:

40-60%

± 10%

Amplitude (TTL):

TTL Levels into 50

Quantity:

Connector:

Female BNC

Factory setting:

10 MPPS