WR-G35DDCi Multichannel Coherent Application Guide for Extended topology configuration (ETC)
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3.6 Choosing the frequency reference
When using the internal frequency reference, please connect the internal reference output
REF OUT of the Coherent clock generator board to the frequency reference input REF IN of
the Coherent clock generator board, after it has been installed into a PC (as shown in Picture
3-13). Please use the Frequency reference SMA interconnect cable as described in Section
2.2.12.
Picture 3-13:
Installing the frequency reference SMA interconnect cable
for internal frequency operation
When use of an external frequency reference is required, please connect the frequency
reference signal to the REF IN port of the Coherent clock generator board as described in
Section 2.2.6. Please note that the REF OUT port has to be properly terminated using the
50 ohm terminator when unused.
