Meinberg TCR180, Manual

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7.2.1 Enabling of outputs
By default the time code output, the pulse outputs, the serial outputs, and the frequency synthesizer are dis-
abled after power up until the receiver is synchronized. However, the monitor software can be used to configure
each group of outputs so that they are always enabled immediately after power-up.
Please note: Enabling of the time code output and
the programmable pulses are controlled by the same
setting.
7.2.2 Time Capture Inputs
Two time capture inputs called User Capture 0 and 1 are provided at the rear connector (CAP0 and CAP1) to
measure asynchronous time events. A falling TTL slope at one of these inputs lets the microprocessor save the
current real time in its capture buffer. From the buffer, capture events are transmitted via COM0 or COM1 and
displayed on LCD. The capture buffer can hold more than 500 events, so either a burst of events with intervals
down to less than 1.5 msec can be recorded or a continuous stream of events at a lower rate depending on the
transmission speed of COM0 or COM1 can be measured.
The format of the output string is ASCII, see the technical specifications at the end of this document for
details. If the capture buffer is full a message "** capture buffer full" is transmitted, if the interval between two
captures is too short the warning "** capture overrun" is being sent.
7.2.3 Asynchronous Serial Ports (optional 4x COM)
Four asynchronous serial RS232 interfaces (COM0 ... COM3) are available to the user. In the default mode
of operation, the serial outputs are disabled until the receiver has synchronized after power-up. However, the
system can be configured to enable those outputs immediately after power-up. Transmission speeds, framings
and mode of operation can be configured separately using the setup menu. COM0 is compatible with other
radio remote clocks made by Meinberg. It sends the time string either once per second, once per minute or on
request with ASCII ´?´ only. Also the interfaces can be configured to transmit capture data either automatically
when available or on request. The format of the output strings is ASCII, see the technical specifications at the
end of this document for details.
16 Date: 4th June 2021 TCR180