Giga-tronics 8003, Operation Manual

Page: 51 / 258

Operation
Manual 20791, Rev. C, June 2001 2-15
2.4 CHANNEL Controls
The 8003 has four channels. The measurements to be made on each channel, including the sensor(s) to
make the measurement, can be independently specified. Any number of channels, 1 through 4, can be
on at the same time.
When a Channel number key is pressed, that channel becomes the entry channel. If a Channel key is
pressed and the channel is off (not taking measurements or displaying data), then the channel is turned
on and becomes the entry channel. When a channel becomes the entry channel, the previous entry
channel remains on but will no longer be the entry channel.
2.4.1 OFF Key
[OFF]
The CHANNEL
[OFF]
key turns off the entry channel. This suspends the taking of data and the
display of the channel but does not change any of the entry channel settings. When the channel is
turned back on, it will be the same as it was before.
When the entry channel is turned off, the most recent entry channel that has not been turned off will
become the entry channel. There must always be an active channel. If only one channel is on, it cannot
be turned off.
2.4.2 DEFINE Key
[DEFINE]
The CHANNEL
[DEFINE]
key defines some of the most basic characteristics of the measurement on
the entry channel. When
[DEFINE]
is pressed, the softkey menu structure shown in Figure 2-5 will be
entered. Each of the primary functions of the Define first level menu (labeled C1) will be discussed in
the following.
[
SINGLE SENSOR]
Menu C1: Allows you to define the active channel to measure power from a single sensor only.
Pressing the [ SINGLE SENSOR ] softkey (when it is not in dim, dark blue) brings up sub-menu
C1-1.
[ A], [B], or [C]
Menu C1-1: Refers to the three sensor inputs. Pressing [ A ], [ B ], or [ C ] that is not in dim, dark blue
causes the entry channel to begin taking measurements on the indicated sensor.
[ RATIO]
Menu C1: Allows you to define the active channel to measure the power ratio of any two sensors.
Pressing [ RATIO ] brings up menu C1-2.
[ A/], [B/], [C/]
Menu C1-2: Selects the numerator of the desired power ratio measurement. Selecting the numera-
tor leads to menus C1-3, C1-4, or C1-5 where the denominator is chosen.