HP MPEGscope manual Connecting an External Clock Source

Note

Getting Started

Connecting an External Clock Source

Connecting an External Clock Source

You can use an external clock to synchronize the MPEGscope transmitter to the network. You can also use a 27 MHz external clock as an analysis reference for the Real–time Analyzer.

DVB–SPI Tx EXT CLK IN DVB–SPI Rx

Connect an external transmit clock source to the SMB connector on the SPI interface.

Note: MPEGscope is able to use this external clock source when transmitting from any interface, not just the SPI interface.

Sarnoff 27MHz Ref Clk Input

Connect an external 27 MHz TTL clock source to the SMB connector on the Real–time Analyzer.

The EXT CLK IN SMB connector accepts a 1 V p–p unbalanced signal input, terminating with 50 ohms. The 27 MHZ REF CLK SMB connector accepts a TTL input. It has low impedance to ground when the unit is turned off.

For optimum performance, the total length of the external clock cable should not exceed three meters in length (approximately 10 feet).

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