Tektronix 2714, Programmer'S Manual

Page: 173 / 308

Command and Query Definitions
2714 & 2715 Programmer Manual
4–87
Arguments: None
This simple query returns the currently specified video signal polarity for Video
Monitor mode.
VPOlarity?
VPOLARITYNEGATIVE
VPOLARITYPOSITIVE
Arguments:
LOG:<num>
,
LIN:<num>
,
FM:<num>
,
EXTernal:<num>
This command with a single linked argument specifies the vertical scale factor
for the indicated display mode. The
DSRC
command must be used to enter FM or
EXTernal modes, although the
VRTdsp
command still sets the scale factor.
Link <num> Units Display Type
LOG: 10, 5, 1 dB/div logarithmic
LIN: 10.8 to 342.33
*
m
V/div, mV/div linear
FM: 10, 5, 1 kHz/div linear
EXTernal: 17.5,87.5,175 mV/div linear
* Corresponds to reference level range of –70 dBm to +20 dBm
If units are not supplied,
LIN
assumes volts (for example,
LIN:.1 = LIN:100 mV
),
FM
assumes hertz, and
EXTernal
assumes volts.
VRTdsp LOG:5
(for example)
VRTdsp LIN:50 m V
(for example)
VRTdsp FM:5 kHz
(for example)
VRTdsp EXTernal:175E-3
(for example)
Arguments: None,
LOG
,
LIN
,
FM
,
EXTernal
This query has either one or no argument. It returns a linked response. The
current scale factor is returned when
VRTdsp?
is used without an argument.
When used with an argument,
VRTdsp?
returns the scale factor used when the
indicated mode was last entered. Units are decibel (dB) for
LOG
, volts (v) for
LIN
or
EXTernal
, and hertz (Hz) for
FM
.
VPOlarity?
VRTdsp <arg>
VRTdsp? <arg>