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XLi Time & Frequency System 171

XLi-man, Issue 8, 6/17/2008, Rev. H

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

Multicode Output (87-6002-XL1)

The Multicode Output option card generates four AM time code outputs. Each of the outputs can be

independently configured to generate a specified time code signal. All outputs configured for IRIG-A will

output the same type of IRIG-A (e.g., IRIG-A 130). Likewise, all outputs configured for IRIG-G will output

the same type of IRIG-G. All the other time code types are completely independent from each other.

The Multicode Output card is configured from the front panel keypad and command line interface using

F42 – Multicode Output Configuration (page 69)

. It can also be managed using the web interface.

Specifications

Note: The IRIG time code standard calls for UTC as the time reference. The Multicode option card can

also output Standard, GPS, and Local time for non-standard applications of IRIG, such as dis-

playing the local time on an LED time display unit.

The factory settings are:

• Amplitude into 600 Ω: 6V

• Modulation Ratio: 3:1

• Time Code: IRIG-B 120

• Time Reference: UTC

Installation

Multicode cards that were not factory installed in the XLi require additional installation if there will be

more than one Multicode or N.8 Frequency Synthesizer card in the XLi. Each card needs to have a

unique card ID number. The card ID number is set by changing the SW2 DIP switch settings. The unique

card ID number has no relation to the physical location of the card in the option bays. Changing the card

ID number is not required if there is only one Multicode/N.8 Frequency Synthesizer card, or if the cards

in the XLi were factory installed.

Quantity 4

Connector Female BNC

Output impedance 25 Ω

Amplitude into 50 Ω 0-3 Vp-p, adjustable via internally-accessible potentiometer (3 Vp-p is the factory setting)

Amplitude into 600 Ω 0-10 Vp-p, adjustable via internally-accessible potentiometer

Modulation Ratio 2:1 through 5:1, adjustable via internally-accessible potentiometer (3:1 default)

Time Codes IRIG-A 130, IRIG-A 133, IRIG-B 120, IRIG-B 123, IRIG-E 111, IRIG-E 112, IRIG-E 121,

IRIG-E 122, IRIG-G 141, IRIG-G 142, IRIG-H 111, IRIG-H 112, IRIG-H 121, IRIG-H 122,

2137, XR3, NASA 36

(All codes in 24 hour format)

Time References Standard, UTC, GPS, or Local

Occupies 1 Bay

CPU-Aware No

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Symmetricom XLi User Manual

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