Rohde & Schwarz FSQ series, Quick Start Manual

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R&S FSQ Front and Rear Panel
Rear Panel Connections
1.20 Quick Start Guide 1313.9652.62 - 02
The table above shows the multiplexed data at the output of the LVDS transmitter.
(DS90CR483 is used as transmitter; for further information on multiplexing/demultiplexing
scheme, refer to http://www.national.com/ds.cgi/DS/DS90CR483.pdf)
The table below shows the demultiplexed data at LVDS receiver output.
(recommended receiver: DS90CR486 or DS90CR484; for further information on multiplexing/
demultiplexing scheme, refer to http://www.national.com/ds/DS/DS90CR486.pdf)
* The data rate is always 81.6 MHz. The sampling rate can be set from 10 kHz to 81.6 MHz.
When the sampling rate is lower than 81.6 MHz, not all transmitted data are valid samples.
The ENABLE bit indicates the valid samples. The VALID bit is high during the entire data
transmission.
D47 to D28: one 20-bit-wide sample, imaginary part
D23 to D4 : one 20-bit-wide sample, real part
D27 to D24, D3 to D0: control bits for data transmission
Data bit Signal name Description
D47 IM_19 Imaginary part, bit 19, Q signal (MSB)
D46 IM_18 Imaginary part, bit 18, Q signal
D45 IM_17 Imaginary part, bit 17, Q signal
…
D29 IM_1 Imaginary part, bit 1, Q signal
D28 IM_0 Imaginary part, bit 0, Q signal (LSB)
D27 Reserve_2 reserved for future use
D26 MARKER_2 Marker bit 2, e.g. marking of beginning or end of a burst (high = active /
low = inactive)
D25 TRIGGER_2 Trigger bit 2, marking of trigger event (high = active / low = inactive)
D24 TRIGGER_1 Trigger bit 1, marking of trigger event (high = active / low = inactive)
D23 RE_19 Real part, bit 19, I signal (MSB)
D22 RE_18 Real part, bit 18, I signal
D21 RE_17 Real part, bit 17, I signal
…
D5 RE_1 Real part, bit 1, I signal
D4 RE_0 Real part, bit 0, I signal (LSB)
D3 Reserve_1 reserved for future use
D2 MARKER_1 Marker bit 1, e.g. marking of beginning or end of a burst (high = active /
low = inactive)
D1 ENABLE * Indicates valid data word (high = valid, low = invalid)
D0 VALID * Indicates valid data transmission (high = valid, low = invalid)