Meinberg TCR170PEX - Manual (Page 23)

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Frequency synthesizer
The frequency synthesizer is capable to generate output frequencies of 1/8 Hz up to
10 MHz as sine wave signal and with TTL level into 50
Ω. If a frequency smaller than
1 kHz has been selected, the following decimal places lead to real fractions of Hertz:
0.1: 1/8 Hz
0.3: 1/3 Hz
0.6: 1/6 Hz
If a frequency of 0 Hz is selected, the synthesizer is turned off.
The phase position of the output frequency can be set from -360° to +360° with a
resolution of 0.1°. If the phase angle is increased, the signal is more delayed. If the
output frequency is bigger than 10 kHz, the phase angle can’t be set.
Putting into operation
To achieve correct operation of the board, the following points must be observed.
Installing the TCR170PEX in your Computer
Every PCI Express board is a plug&play board. After power-up, the computer's BIOS
assigns resources like I/O ports and interrupt numbers to the board, the user does not
need to take care of the assignments. The programs shipped with the board retrieve
the settings from the BIOS.
The computer has to be turned off and its case must be opened. The radio clock can
be installed in any PCI Express slot not used yet. The rear plane must be removed
before the board can be plugged in carefully. The computer´s case should be closed
again and the antenna can be connected to the coaxial plug at the clock's rear slot
cover. After the computer has been restarted, the monitor software can be run in order
to check the clock's configuration.The computer´s case should be closed after instal-
lation.
Power supply
All power supplies needed by TCR170PEX are delivered by the PCI bus.