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: 50 Ω
- Rise Time to 90% of Level: <10 ns
- Programmable Pulse Width: 100 ns to 900 ms with 20 ns resolution
- Absolute Phase Error: ±50 ns (1σ)
- Programmable Phase Shift: ±5ns to 500 ms with 5ns resolution
- Maximum Number of Cards: 6
- Ordering Information: 1204-18 1PPS TTL output module, BNC connector
Model 1204-18 option card rear plate
Model 1204-19 1PPS Output (10 V): Specifications
- Outputs: (4) 1PPS output
- Signal Type and Connector: 10 V (BNC)
- Output Load Impedance: 50 Ω
- Rise Time to 90% of Level: <30 ns
- Programmable Pulse Width: 100 ns to 900 ms with 20 ns resolution
- Absolute Phase Error: ±50 ns (1σ)
- Programmable Phase Shift: ±5ns to 500 ms with 5ns resolution
- Maximum Number of Cards: 6
- Ordering Information: 1204-19 1PPS 10 V output module, BNC connector
Model 1204-19 option card rear plate
Model 1204-21 1PPS Output (RS-485): Specifications
- Inputs/Outputs: (4) 1PPS output
- Signal Type and Connector: RS-485 (terminal block)
- Output Load Impedance: 120 Ω
- Rise Time to 90% of Level: <10 ns
- Programmable Pulse Width: 100 ns to 900 ms with 20 ns resolution
- Absolute Phase Error: ±50 ns (1σ)
- Programmable Phase Shift: ±5ns to 500 ms with 5ns resolution
- Maximum Number of Cards:6
- Ordering Information: 1204-21 1PPS RS-485 output module, terminal block
Model 1204-21 option card rear plate
Model 1204-21 terminal block pin assignments
Pin No. | Function |
---|---|
1 | 1PPS Output 1 + |
2 | 1PPS Output 1 - |
3 | GND |
4 | 1PPS Output 2 + |
5 | 1PPS Output 2 - |
6 | 1PPS Output 3 + |
7 | 1PPS Output 3 - |
8 | GND |
9 | 1PPS Output 4 + |
10 | 1PPS Output 4 - |
Model 1204-2B 1PPS Output (Fiber Optical): Specifications
- Inputs/Outputs: (4) 1PPS output
- Operating Wavelength: 820/850 nm
- Optical Power: -15 dBm average into 50/125 fiber
- Fiber Optic Compatibility: 50/125 μm, 62.5/125 μm multi-mode cable
- Optical Connector: ST
- Programmable Pulse Width: 100 ns to 900 ms with 20 ns resolution
- Absolute Phase Error: ±50 ns (1σ)
- Programmable Phase Shift: ±5ns to 500 ms with 5ns resolution
- Maximum Number of Cards: 6
- Ordering Information: 1204-12B 1PPS Fiber Optic output module, ST connector
Model 1204-2B option card rear plate
1PPS Output: Edit Window
To configure the settings of a 1PPS Output, go to its Edit window. For instructions, see: Configuring Option Card Inputs/Outputs.
The Web UI list entries for these option cards are:
- 1PPS OUT, 4-BNC
- 1PPS OUT, 10 V
- 1PPS OUT, RS-485
- 1PPS OUT, Fiber
Note: SecureSync starts numbering I/O ports with 0 (only 1PPS and 10 MHz outputs start at 1, because of the built-in outputs).
The Edit window allows the configuration of the following settings:
- Signature Control: Used to control when the 1PPS output signal will be present. See Signature Control.
- Offset: Used to account for 1PPS cable delays or other latencies in the 1PPS output. The Offset value is entered and displayed in nanoseconds (ns). The available Offset range is -500 to +500 ms.
- Edge: The operator can select if the output signal is a positive (reference on the rising edge) or a negative (reference on the falling edge) pulse.
- Pulse Width: Configures the Pulse Width of the 1PPS output. The Pulse Width is entered and displayed in nanoseconds (ns). The default Pulse Width is 200 milliseconds.
1PPS Output: Status Window
To view the current settings of a 1PPS Output, go to its Status window. For instructions, see: Viewing Input/Output Configuration Settings.
The Web UI list entries for these option cards are:
- 1PPS OUT, 4-BNC
- 1PPS OUT, 10V
- 1PPS OUT, RS-485
- 1PPS OUT, Fiber
Note: SecureSync starts numbering I/O ports with 0 (only 1PPS and 10 MHz outputs start at 1, because of the built-in outputs).
The Status window displays the following settings:
- Signature Control: Displays the current configuration of Signature Control; see Signature Control.
- Frequency: Indicates the configured frequency of the 1PPS output signal.
- Offset: Displays the configured Offset (to account for cable delays or other latencies).
- Edge: Shows if the on-time point of the 1PPS output is the rising or falling edge of the pulse.
- Pulse Width: Displays the configured Pulse Width of the 1PPS output. The Pulse Width is displayed in nanoseconds (ns). The default Pulse Width is 200 milliseconds.