Rohde & Schwarz EX-IQ-BOX, Руководство пользователя

Страница: 111 / 418

Protocol Settings
R&S
®
EX-IQ-BOX
96 User Manual 1409.5570.32 ─ 05
ating mode is called User Defined and provides a maximum of flexibility and configura-
tion possibilities.
Devices like ADC’s and DAC’s, modulators and demodulators, submodules of mobile
base stations or IC’s of mobile equipment are tested with this operating mode, including
early prototypes like FPGA implementations and also real time tests with mature ASIC
samples.
R&S Signal Analyzer
Device Under Test
e.g. digital IQ modulator
with IF output
Digital IQ data
Clock
Breakout Board
R&S EX-IQ-BOX
Transmitter
mode
USB control
Digital IQ
data
R&S Signal Generator
Reference
R&S
IQ format
Analog output
R&S DigIConf
...
...
...
Digital IQ Interface Settings
e.g. 12 single ended lanes
+ clock
CMOS 2.5V
paralllel data
double data rate
I/Q interleaved
internal clock ( clk out)
clock 38.4 MHz
phase 90 degree
Digital IQ Interface Settings
e.g. 12 single ended lanes
and clock
CMOS 2.5V
paralllel data
double data rate
I/Q interleaved
internal clock ( clk out)
clock 38.4 MHz
phase 90 degree
Fig. 7-1: Test scenario of a User Defined application
7.1.1 Parameter Overview
Beside the main controls, like switching on the R&S EX-IQ-BOX output, transmission
direction and save/recall of settings, the interface is controlled by parameters, which are
grouped by function:
Parameter Group Purpose Examples
Protocol Fundamental protocol type set-
tings Parallel/serial interface, double data rate, I/Q
interleaving
Data Data representation Resolution, alignment, bit order, numeric format
Clock Interface clock settings Clock rate, phase shift, skew, frequency refer-
ence
Trigger Synchronization Trigger source, delay
Test Diagnostics on the interface to the
DUT TX Test, RX Test, Test signal sources
User Defined