User manual
47
Serial BUS Analysis
12 Serial
BUS Analysis
12.1 Software options (licence key)
The R&S®HMO3000 series can be upgraded with options /
voucher to trigger and decode serial buses.
❙ R&S®HOO10 / R&S®HV110:
The option R&S®HOO10 resp. the voucher R&S®HV110
can be used to trigger and decode I
2
C, SPI and UART/
RS-232 buses on the digital channels (option logic probe
R&S®HO3508 needed) and on the analog inputs. This
option allows the decoding of two serial buses
simultaneously.
❙ R&S ® H O O11 / R&S®HV111:
The option R&S®HOO11 resp. the voucher R&S®HV111 can
be used to trigger and decode I
2
C, SPI and UART/RS-232
buses on analog inputs only and it only allows the
decoding of one serial bus at a time.
❙ R&S®HOO12 / R&S®HV112:
The option R&S®HOO12 resp. the voucher R&S®HV112
can be used to trigger and decode CAN and LIN buses on
the digital channels (option logic probe R&S®HO3508
needed) and on the analog inputs. This option allows the
decoding of two serial buses simultaneously.
The options R&S®HOO10, R&S®HOO11 and R&S®HOO12
can be ordered in combination with a R&S®HMO1002 ex
factory. The upgrade voucher R&S®HV110, R&S®HV111
and R&S®HV112 can be activated by a software license key
(please refer to chapter 2.7).
The analysis of parallel and serial data consists of the fol-
lowing three basic steps:
❙ Protocol conguration (BUStype/protocol-specic
settings)
❙ Decoding (Display of decoded data / Zoom / BUS table)
❙ Trigger (Start / Stop / serial samples)
12.2 Serial Bus Conguration
ItisnecessarytodeneaBUSbeforeyoucandetermine
the settings for the serial trigger and decoding functions. A
maximumoftwobuses,B1andB2,maybedened.Press
the BUS button in the VERTICAL section. This will open
a short menu where you can press the bottom soft menu
key B1 or B2. Additionally you can use the MENU button in
theVERTICALsectionandthetopsoftmenukeytodene
the respective BUS (B1 or B2).
The serial bus analysis is performed with 1/8 of the sampling
rate.
Prior to the BUS conguration it is necessary to set the correct
logic level (threshold). Please refer to chapter 4.5. The default
setting is 500 mV.
Depending on the installes option use the soft menu key
BUS TYPE to choose from the following BUS types:
❙ PARALLEL (Standard)
❙ PARALLEL CLOCKED (Standard)
❙ SSPI (only available with R&S®HOO10/HV110/HOO11/HV111)
❙ SPI (only available with R&S®HOO10/HV110/HOO11/HV111)
❙ I
2
C (only available with R&S®HOO10/HV110/HOO11/HV111)
❙ UART (only available with R&S®HOO10/HV110/HOO11/HV111)
❙ CAN (only available with R&S®HOO12/HV112)
❙ LIN (only available with R&S®HOO12/HV112)
The soft menu key CONFIGURATION allows you to invoke
a menu corresponding to the selected bus type. A menu
description can be found in the chapters of the respective
BUSconguration.ThesoftmenuDISPLAYSETUPisiden-
tical for all buses and allows you to select the decoding
format. You may choose from the following formats:
❙ Binary
❙ Hexadecimal
❙ Decimal
❙ ASCII
Use the soft menu key BITS to activate or deactivate the
display of individual bit lines (above the table display). The
last entry NAME in the VERTICAL menu opens a submenu
which allows you to enter a BUS name. This name will be
displayed on the gridandtheprintout.Yourrstoptionis
to switch the display on (ON) or off (OFF). The next option
includes the menu item LIBRARY. After selecting this
option, you can use the universal knob to choose a name
from several suggestions. The EDIT LABEL key allows
you to enter a completely new name or to customize the
suggested name. You may enter up to 8 characters. Use
theACCEPTkeytoconrmthenameintheeditor.Itwill
then be shown in the display. The name is assigned to that
specicsignal.
12.2.1 BUS Table
ThesoftmenuBUSTABLEallowsyoutocongure/ex-
port a list of all decoded messages in storage. The table
contentisprotocolspecicandthetabledisplaycanbe
activated for each individual BUS type. The top soft menu
key BUS TABLE allows you to activate or deactivate the list
Fig.12.1:Menuforthedenitionofbuses