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Resumen del manual
Since signal detect works on light energy alone, there does not need to be valid data on the fiber receiver for there to be an output from the transmitter. If there is valid data present on the fiber receiver, it is copied to the fiber transmitter. This preserves data transparency but not necessarily protocol transparency. The outgoing protocol is always serial FPDP. AGE1439_FIBER_MODE_RAW transmits unprocessed and unbuffered ADC data over the fiber interface. After selection, optical data transmission begins when the first measurement is triggered, and continues indefinitely after the measurement is complete. Transmission will continue until the fiber mode is changed to something other than AGE1439_FIBER_MODE_ RAW or a fiber error occurs. While this raw data is being transmitted, filtered ADC data can still be sent over the local bus, or read from the FIFO via the VME bus. Attempting to set AGE1439_ Agilent E1439 Programmer's Reference Functions listed alphabetically FIBER_MODE_RAW and the age1439_data_port to fiber will result in the AGE1439_ STATUS_SETUP_ERROR bit being set. This is because the fiber interface cannot send both raw and filtered ADC data at the same time. Note Attempting to use the flow control while in AGE1439_FIBER_MODE_RAW fiber mode will likely result in a TX_ERR_OVERRUN error. The transmit FIFO size is only1 Kbyte AGE1439_FIBER_MODE_GENERATE causes filtered ADC data to be transmitted over the fiber interface when one block is available in the FIFO. When flow control is enabled in this mode, an external optical receiver can send stop and go commands that cause the module to pause or resume data transmission. Received optical data other than data flow control signals are ignored. AGE1439_FIBER_MODE_APPEND copies data from the fiber optic receiver to the fiber optic transmitter and appends its own filtered ADC data, when available. fibermodePtr points to the current value of fiberMode. flowControlMode configures fiber flow control. When flow control is on, an external optic receiver can pause or resume the fiber data transmission by sending a stop or go command. Received optical data other than flow control signals and PIO bits are ignored. AGE1439_FLOW_CONTROL_NO_COPY responds to received flow control signals GO and STOP, and transmits GO. AGE1439_FLOW_CONTROL_COPY responds to received flow control signals GO and STOP, and transmits the received flow control signal values. AGE1439_FLOW_CONTROL_OFF disables fiber flow control. flowControlModePtr points to the current value of flowControlMode. transferRate sets both the transmitter and receiver raw data rates. AGE1439_106MBS transfers data at the legacy data rate of 106 Mbytes per second. This is the default setting. AGE1439_250MBS transfers data at 250 Mbytes per second. This is fast enough to support continuous transmission of data at the highest sample rates and bit depths. transferRatePtr points to the current value of transferRate. Return Value AGE1439_SUCCESS indicates that a function was successful. Values other than AGE1439_SUCCESS indicate an error condition or other important status condition. To determine the error message, pass the return value to “age1439_error_message” on page 102. See Also “Default values” on page 201, “age1439_init” on page 132, “age1439_error_message” on page 102 114 Agilent E1439 Programmer's Reference Functions listed alphabetically age1439_fiber_signal_get Returns a value indicating whether or not an optical signal is detected by the optical fiber interface receiver. VXIplug&play Syntax #include "age1439".h ViStatus age1439_fiber_signal_get(ViSession id,ViPInt16 fiberSignalPtr); Parameters id is the VXI instrument session pointer returned by the age1439_init function. fiberSignalPtr returns a value indicating whether or not an optical signal has been detected by the fiber interface receiver. AGE1439_NO_FIBER_SIGNAL indicates no optical signal has been detected by the fiber interface receiver. AGE1439_FIBER_SIGNAL_PRESENT indicates an optical signal has been detected by the fiber interface receiver. Return Value AGE1439_SUCCESS indicates that a function was successful. Values other than AGE1439_SUCCESS indicate an error condition or other important status condition. To determine the error message, pass the return value to “age1439_error_message” on page 102. See Also “age1439_init” on page 132, “age1439_fiber_LED_get” on page 110, “age1439_status_get” on page 176 Agilent E1439 Programmer's Reference Functions listed alphabetically age1439_fiber_verify This function verifies the operational condition of the fiber interface. VXIplug&play Syntax #include "age1439".h ViStatus age1439_fiber_verify(ViSession id,ViInt16 verifyPath, ViInt16 sec); Description This function performs a verification of the fiber interface using either an internal or an external signal path. The internal signal path cannot test the actual RX/TX ports but does test the internal connections of the fiber interface to the rest of the mo...
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