User manual

12
Introduction
2.8.1 Logic Probe Self Alignment
The self alignment for the optional logic probe
R&S®HO3508 primarily aligns the switching levels. To start
the self alignment for the logic probe, it is necessary that
the logic probe type R&S®HO3508 is connected to the
R&S®HMO Compact series. It is imperative that the bit
connectors are not connected. To start the process, select
the menu item LOGIC PROBE in the SELF ALIGNMENT
soft menu. The process is similar to the basic instrument
alignment but it only takes a few seconds.
2.9 Back Panel
On the rear panel there are the main power switch [1], the
receptacle for interface modules [2] (USB / RS-232, USB/
Ethernet, IEEE-488), the DVI-D connector [3] for the con-
nection of external monitors / projectors, the BNC connec-
tor for the Y output [4] (selected channel for triggering) and
the external trigger input [5]. With two-channel models this
connectorislocatedonthefrontpanel.Youcanalsond
an additional USB port [6] and the main power input [7].
2.9.1 DVI Connector
The rear panel of the oscilloscope includes a standard DVI-
D connector to connect external monitors and projec-
tors. The DVI-D connector can only send digital signals.
This means it is impossible to connect monitors or bea-
mers via their analog inputs. The R&S®HMO Compact se-
ries yields a DVI signal with VGA resolution (640x480). This
design enables connectivity with all standard TFT moni-
tors.Modernatscreensextrapolatethesignal,allowing
users to see a full screen. Beamers can also be connec-
ted to the R&S®HMO Compact series. Ideal beamers in this
case are those designed to be connected to computers /
Fig. 2.13: Logic probe self alignment
The connection to current HDTVs via HDMI adapter can be prob-
lematically. The most television sets expect an HDTV signal of at
least 720p as input signal.
notebooks as these are also able to process a 640x480 pi-
xel resolution.
2.9.2 Y-Output connector
The R&S®HMO Compact series has an additional BNC con-
nector (Y-Output) on the rear panel which is used to pass-
through and output the analog signal of the triggered
channel on the one hand or to send alarm pulses when er-
rors occur during mask tests (PASS / FAIL) on the other
hand (see chapter 9). This can be very useful for longterm
data-logging or if you want to trigger mask-fails during au-
tomated production or testing processes. The level of that
analog output signal is based on 200 mV/DIV (100 mV/
DIVat50Ω)oftheADC(analog-digital-converter).Thefol-
lowing screenshot will show a 15 kHz sine wave with a 2 V
amplitude: CH1 (yellow) original signal, CH2 (blue) Y-Out
signal.
The output signal of the R&S®HMO Compact series shows a
small timeshift in the lower nano-seconds time domain.
Fig. 2.15: Y-Out signal
If an error occurs during the self alignment although it has been
carried out as described, please send the exported .log le (see
Self Alignment menu) to [e-mail]
or [e-mail]. You can save the .log le to a USB stick.
[2]
[1]
[5] [4]
[7]
[3]
[6]
Fig. 2.14: Rear panel of the R&S®HMO2024