IRIG Timecode Receiver and Generator
The RG1 Time Code receiver synchronizes to IRIG-A/B/G time codes and provides precise time in a memory register, for the host SBC.
The IRIG output of the card can be used to synchronize other IRIG time code readers. Additionally, the RG1 includes a real-time clock (RTC) that may be used as a reference source for IRIG master applications, to free the system processor from the task of updating the master timer.
The most common format is IRIG-B, but the module can also support IRIG-A and IRIG-G formats as well.
- Analog Input, AM ASK IRIG Receiver (Formats A, B or G): Signal level to 0.5 to 10 Vpp; 3:1 modulation ratio; Zin: 20k or 50 ohm, selectable; Isolated input (high CMR limited only by isolation)
- Node Capacity (maximum): 3-Node; 2 x 3 ports and 1 x 2 ports
- Digital Input IRIG Receiver (Formats A, B or G): DCLS; Isolated input
- Analog Output, AM ASK IRIG Generator(Formats A, B or G): Configurable signal level (0 to 18 Vpp for high-Z or 0 to 9 Vpp for 50 ohm load); Modulation ration: 3:1
- Digital Output IRIG Generator (Formats A, B or G): DCLS encoding; Signal Level: RS-232 or RS-422/485
- IRIG Generator (Formats A, B or G): 10 MHz Reference output (RS-422)
- 1-PPS Output (RS-232 or RS-422) Digital Output
- Real-Time Clock (RTC): May be used as a reference source for an IRIG master
- Event Input Signal: RS-232 or RS-422/485
- Built-in Test & Functions: Over-current protection/status
- Supported IRIG Protocols: A000, A001, A002, A003, A004, A005, A006, A007, A130, A131, A132, A133, A134, A135, A136, A137, B000, B001, B002, B003, B004, B005, B006, B007, B120, B121, B122, B123, B124, B125, B126, B127, G001, G002, G005, G006, G141, G142, G145, G146
- IRIG AM input or Output: Formats A, B, G
- IRIG AM input signal level: 0.5 to 10 Vp-p
- IRIG AM input modulation ratio: 3:1
- IRIG AM input impedance: 20k or 50 ohm, selectable
- IRIG AM output signal level: 0 to 9 V p-p min. (50 Ω load) or 18 V p-p min. (hi-Z load); configurable in 256 steps
- IRIG AM output modulation ratio: 3:1
- IRIG DCLS Input or Output: Formats A, B, G
- IRIG DCLS input decoding: DCLS (DC level shift) decoding
- IRIG DCLS output encoding: DCLS (DC level shift) encoding
- IRIG DCLS input or output signal level: RS-232 or RS-422*/485
- 10 MHz reference output: RS-422*
- External 1PPS output: RS-232 or RS-422*
- External 1PPS output Pulse Width: 1 ms – 100 ms, configurable
- Event Input, GPIO: RS-232/422*/485, configurable. Captures the time on the rising or falling edges. This transition will also generate an interrupt.
- Isolation: Module power source (ISO-GND) and I/O to system ground is ≥500 VDC
- Power: 5 VDC / 850 mA (max); ±12 VDC @ 20 mA (max est.)
- Weight: 1.5 oz. (42 g)
Product Specifications (Continued)
|Reference Synchronization Accuracy||The reference accuracy and 1PPS output for AM inputs when slaved to a reference source should fall within:
The reference accuracy and 1PPS output for DCLS inputs when slaved to a reference source should fall within:
The reference accuracy and 1PPS output for GPS inputs (not applicable to RG1) when slaved to a reference source should fall within: ±100 ppb (±100ns)
|Free-Running Drift/Accuracy||The drift per second when free-running after losing lock with an AM reference source input should fall within:
The drift per second when free-running after losing lock with an DCLS reference source input should fall within:
The drift per second when free-running after losing lock with a GPS reference source (not applicable for RG1) should fall within: ±280 ppb/sec (±280 ns/sec)
(All) specifications pending design verifications and qualification. Specifications listed are defined at/to the module boundary.
*RS-422 Hardware Interface: Effectively implemented by programming the channel(s) for RS-485 differential signal level AND programming receiver input termination (120 ohms).
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