168 XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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Expansion Module (87-8034-1, 87-8034-2)
The Expansion Module is a versatile option that expands the number of standard time code and pulse
rate outputs from the XLi. Four independent, user configurable outputs are provided. The output signals
are selectable via an on-module rotary switch. Specify output signals configuration at time of order. A
version of the module is also available supporting an alarm relay output.
The available output types are as follows:
• Time Code AM/DC: Format mirrors selected XLi standard code output (IRIG A,B; IEEE 1344 or
NASA 36)
•Alarm
• Rates (1 PPS, 1 kPPS, 10 kPPS, 100 kPPS, 1 MPPS, 5 MPPS, 10 MPPS)
• Programmable Pulse (Requires PPO option to be installed)
• Alarm Relay (87-8034-2)
Connector Quantity and Type: Four female BNC
Mechanical:
•1 slot
• 2 slots with Alarm relay option
IRIG Code Out
Alarm
Rates
Format: IRIG A, B; IEEE 1344 or NASA 36
Amplitude (AM): (AM): 3.0 Vp-p +/-1V, into 50 Ω
Ratio (AM): 3:1 +/- 10%
Amplitude (DC): TTL into 50 Ω
Phasing: In phase with carrier ± 10 μS
Active: High
Amplitude: TTL Levels into 50 Ω
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 Ω
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