Symmetricom XL-GPS User Manual

Page 19

997-01530-01, Rev. C-25, Jan 2008

IRIG Code Out

Alarm

Rates

Optional Programmable Pulse

Optional Alarm Relay

NTP

The standard network interface of the XL-GPS can be optionally enabled at the factory, or by the user in
the field, to become a Network Time Server (NTS) to client clocks over a network. Time is acquired from
the host clock and distributed over the network using the Network Time Protocol (NTP). Initialization of
the NTS option is done via the Serial I/O port, Network Port, or via the front panel keypad.

Format:

IRIG B-120 1 kHz AM, or IRIG B-000 DC

Amplitude (AM):

3.0 Vp-p +/-1V, into 50 Ω

Ratio (AM):

3:1 +/- 10%

Amplitude (DC):

TTL into 50

Phasing:

In phase with carrier ± 10

μS

Off

(High Z) Power off

Off

(High Z) Error, major or minor enabled alarm fault.

(Low Z) Normal, no major or minor enabled alarm faults.

Drive:

Open Collector

Max. Voltage:

25 VDC

Max. Current:

50 mA

Rate:

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

Duty cycle:

60/40% +/- 10%

Amplitude (TTL):

TTL Levels into 50

On time edge:

Rising

Amplitude:

TTL Levels into 50

Connection:

Terminal strip, COM, NO, NC

Max Voltage:

48 VAC/VDC

Max Current:

2 A @ 24 VDC