BK Precision 5105B, Instruction Manual, Page: 42 / 48

42
Subject to change without notice
PROBE
ADJ
CH 3 CH 4 INPUTS
1M
Ω
II15pF
max
400 Vp
X-INP
LOGIC
INPUTS
1M
Ω
II15pF
max
100 Vp
TRIG
EXT
CH 1
Z-INP
VERT/XY CH 2 CH 3/4 HOR MAG
CAT I
!
CAT I
!
VAR VAR VAR x10
00
POWER
36 38
29
37
35
34 31
32 33
30
If the signal is disconnected resp. the amplifier input connected
to ground the readout will show a ground symbol behind the
sensitivity indication. In automatic trigger mode the trace will
be visible in a reference position which can be used as a 0 V
ground reference. The readout will show a symbol ( ) for 0 V
which will be close to the vertical centre line of the graticule,
it is the zero reference for any measurements.
Referred to the trace position 0 V a DC voltage may be
measured after the input was returned to the signal.
33.3 Invert On Off
The pushbutton will alternate between not inverted and
inverted. An inverted signal will be indicated in the readout by
bar above the channel symbol. The trigger signal taken from
an input will not be affected.
33.4 Probe menu
This pushbutton opens the ”CH2 probe“ submenu.
33.4.1 *1 - *10 - *100 - *1000
A selection of 4 factors can be made, the factor chosen will be
automatically taken into account for all displays and
measurements.
33.4.2 auto
If ”auto“ was selected probes with special probe
identification connectors will be automatically identified and
the appropriate factor taken into account. The probe factor
identified will be shown behind ”auto“.
Probes without that special connector will be treated as 1:1
probes (display ”auto*1“), for those the factor must be
manually set.
33.5 Variable On Off
If the variable is on VAR on the pushbutton will be illuminated
and indicates that the sensitivity is now uncalibrated, the
readout will show ”
> “ instead of ”:“ (e.g. ”CH2 > 5 mV“) The
results of cursor measurements will be identified accordingly.
The VOLTS/DIV-SCALE-VAR knob
of CH2 has now the
function of variable, the sensitivity can be varied between
1 mV/cm to
> 20 V/cm.
INPUT CH1 (BNC connector)
This is the CH1 signal input connector. In Yt mode it is a Y
input, in XY mode it is the X signal input. The connector housing
is connected to the instrument housing and thus to safety
ground. The ring around the connector is the probe
identification contact, no voltage may be applied here.
INPUT CH2 (BNC connector)
This is the CH2 signal input connector. It is a Y input in Yt and
XY mode. The connector housing is connected to the
instrument housing and thus to safety ground. The ring around
the connector is the probe identification contact, no voltage
may be applied here.
STOP
36.1.1
triggering press SOURCE , select the ”Trig. Source“ menu,
then ”External“.
36.1.2 If ”External“ triggering was not selected the menu
”Z Input“ will open up.
If ”On“ is chosen it will function as Z input i.e. intensity
modulation input. This input is destined for TTL signals, a
voltage of
>
1 Vp will turn off the trace.
C o n t r o l s a n d R e a d o u t
AUXILIARY INPUT
TRIGGER
EXTERN
Z-INPUT
1M
Ω
II
15pF
max
100 Vp
CAT I
!
AUX
For setting external