Follow the System Software update procedure, as outlined under "Software Updates" on
page319.
NEXT: Restore your reference priority configuration, as described in the following topic, and
configure other option card-specific settings, as described in the main User Manual.
5.2.2.15 [12]: Restoring Reference Priority Configuration
If you saved your Reference Priority configuration under STEP [2], you can now restore it:
For instructions, see "Restoring the System Configuration" on page327.
Card-specific configuration instructions may be found in the Option Cards Guide, see "Option
Card Identification" on page13 to locate your card.
5.2.3 Time and Frequency Option Cards
This section contains technical information and Web UI procedures relevant to SecureSync
option cards designed to deliver time and frequency signals.
5.2.3.1 1PPS Out [1204-18, -19, -21, -2B]
1PPS Output Modules (TTL, 10V, RS-485)
The 1PPS output module provides four additional 1PPS outputs on BNC connectors or terminal
block for the SecureSync platform.
Model 1204-18 1PPS Output (TTL): Specifications
Outputs: (4) 1PPS output
Signal Type and Connector: TTL (BNC)
Output Load Impedance: 50Ω
Rise Time to 90% of Level: <10ns
Programmable Pulse Width: 100ns to 900ms with 20ns resolution
Absolute Phase Error: ±50ns (1σ)
Programmable Phase Shift: ±5ns to 500ms with 5ns resolution
Maximum Number of Cards: 6
Ordering Information: 1204-18 1PPS TTL output module, BNC connector
SecureSync User Reference Guide 367
APPENDIX
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