Tektronix 2247A

C4
me
|
Controls, Connectors, and Indicators
SET MEAS'MT CHANNEL—Displays menus for setting
measurement-source channels for active measurement modes.
There are two one-page menus avallable; one for voltmeter and
rise/fall measurements, and one for single-channel Counter/Timer
measurements. Two-channel measurements, such as delta time,
frequency ratio, and propagation delay, have two-page menus. Each
menu lists all valid input channels that can be selected for that
measurement mode.
\f the SET MEAS'MT CHANNEL button Is pressed for an invalid mode,
one of the following messages will be displayed for two seconds:
1. SELECT A MEASUREMENT—When no measurement mode is
active,
2. NO MEAS CHANNEL NEEDED—When a selected measure-
ment mode (such as cursor time) does not require a measure-
ment channel to be set.
When a SET MEAS'MT CHANNEL menu Is displayed, changing the
Horizontal MODE, except between ALT and B, clears the menu.
LAST MEAS'MT—Recalls the last active measurement mode to the
display and resets the measurement channel. If the last active
measurement mode Is already displayed when the LAST MEAS'MT
button Is pressed, only the measurement channel is reset.
The measurement channel for VOLTMETER, CURSOR VOLTS, and
RISE or FALL measurement modes Is set to CH 1, If CH 1 Is
displayed, otherwise to CH 2. If neither CH 1 nor CH 2 Is displayed,
CH 1 will be turned on and will be the measurement channel.
The measurement channel for single-channel Counter/Timer
measurements
|s
set
to
the
lowest
number
displayed
channel
(may
be
set to CH 1, CH 2, CH 3, CH 4, or ADD).
Measurement
channels
for
time
measurement
modes
(ALT
and
B
Horizontal
modes)
and
dual-channel
Counter/Timer
measurements
are
set
to
the
lowest
number
displayed
channel
for
the
delay
time
(or
B
source
1)
and
the
next
lowest
number
displayed
channel
for
the
delta-delay
time,
(or
B
source
2)
if
more
than
one
channel
Is
displayed.
Both
are
set
to
the
same
channel
when
only
one
channel
Is
displayed.
CH
1
Is
considered
the
lowest
numbered
channel,
and
ADD
ls
considered
the
highest
numbered
channel.
2247A
Operators
2-23