Rohde & Schwarz EX-IQ-BOX, Руководство пользователя

Страница: 177 / 418

Protocol Settings
R&S
®
EX-IQ-BOX
162 User Manual 1409.5570.32 ─ 05
The BNC connectors for general purpose signals are located on top of the breakout
board.
Direction GPIO 1-3
Determine the transmission direction at the connected GPIO interfaces. You can indi-
vidually activate each of the three interfaces separately. Find additional information on
the connectors in
​
chapter 7.2.4.1, "Top View" , on page 140, and
​
chapter 10.3.3.1, "Con-
nector Locations - CPRI Breakout Board" , on page 367.
"OFF" Deactivate the GPIO interface.
"Output" Select the respective GPIO interface as output, that means send a con-
trol signal to the external device.
"Input" Select the appropriate GPIO interface as input, which means you
receive a signal from the external device, for example for trigger pur-
poses.
Remote command:
​
[:
​
SOURce<hw>]:
​
EBOX:
​
CPRI:
​
HW:
​
GPIO<ch>:
​
DIRection
​
on page 301
Signal GPIO 1-3
Determine the type of the control signal. You can define separate signals for each of the
three interfaces.
"Constant Low/High"
GPIO output
Set the control signal to constant level high or low.
"DL/UL Basic Frame"
GPIO output
Take the information in the CPRI basic frame for control. According to
the WCDMA clock rate, the CPRI protocol synchronizes its basic frame
with 3.84
MHz.
"DL/UL Hyper Frame"
GPIO output
Use the CPRI hyper frame clock for control. The hyper frame clock rate
is 15
kHz.
"DL/UL Node B Frame"
GPIO output
Use the information in the CPRI Node B frame for control. CPRI updates
the B node every 10
ms, that means you can control the DUT with a
clock rate of 100 Hz.
"Timing Measurement Clock"
GPIO output
Use the CPRI signal processing clock, for example 61.44 MHz at 2x
line rate. This clock is used for timing measurements like response time,
latency, etc..
CPRI