The TCR170PEX receives IRIG-A/B or AFNOR time codes and can be used for synchronizing the system time of its host PC. The IRIG output of this card can generate an IRIG signal for other IRIG time code readers. The output format is independent from the incoming IRIG signal - a perfect solution to your IRIG conversion requirements.

The board TCR170PEX is designed as a standard height board for computers with PCI Express interface. The data transfer to the computer is done by using a single PCI Express Lane (x1 board). TCR170PEX serves to decode and generate modulated (AM) and unmodulated (DC Level Shift) IRIG and AFNOR time codes. AM-codes are transmitted by modulating the amplitude of a sine wave carrier, unmodulated codes by variation of the width of pulses.

As standard the module TCR170PEX is equipped with a TCXO (Temperature Compensated Xtal Oscillator) as master oscillator to provide a high accuracy in holdover mode of +/- 1 * 10E-8. Optionally an OCXO (Oven Controlled Xtal Oscillator) is available for better accuracy.

Receiver: Automatic gain control within the receive circuit for unmodulated codes allows decoding of IRIG or AFNOR signals with a carrier amplitude of 600 mVpp to 8 Vpp. The input stage is electrically insulated and has an impedance of either 50 ?, 600 ? or 5 k?, selectable by a jumper. The unmodulated input is accessible via a BNCconnector in the bracket of TCR170PEX.

Unmodulated or ‘DC Level Shift’ time codes must be connected to the D-Sub-plug of the module. The receive circuit is insulated by an onboard photocoupler which can be driven by TTL or RS-422 signals for example. In delivery state of TCR170PEX the contacts of the D-Sub-plug are not connected to the photocoupler. Two DIP-switches must be set to the ‘ON’ position for making this connection.

Generator: The generator of TCR170PEX is capable of producing time codes in IRIG-B or AFNOR format. They are available as modulated (3 Vpp/1 Vpp into 50 ?) and unmodulated (DC Level Shift) signals (TTL into 50 ? and RS-422). A jumper on the board allows selection of active-high or active-low time codes. Regarding time code and its offset to UTC, the receiver and the generator can be configured independantly. Thus TCR170PEX can be used for code conversion. As an option the module can be delivered with optical inputs/outputs instead of the modulated signal paths.

The board TCR170PEX provides two configurable serial interfaces (RS-232). COM0 is available via the Sub-D connector, COM1 can be found at a contact strip of the board. Two programmable pulse outputs can be connected to the D-Sub-plug by setting DIP-switches into the ‘ON’ position.

A contact strip on the board provides two TTL inputs (CAP0 and CAP1) that can be used to capture asynchronous time events. These time stamps are readable via the PCI-bus or the serial interface and can be evaluated by user software.

TCR170PEX provides a synthesizer which can generate output frequencies from 1/ 8 Hz up to 10 MHz with TTL level into 50 Ohm and as a sine signal.

Downloads from Meinberg Homepage

Download Info Sheet: info_tcr170pex.pdf
Download Manual: info_tcr170pex.pdf

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