3156B User Manual
Racal Instrument © 2005
WaveCAD 4-33
2) Arbitrary Stroke Characters – Using this mode, one can use video
files that are stored in memory segments, similar to arbitrary
waveform segments. The arbitrary stroke generator is
automatically selected when the arbitrary waveform mode is
selected. In fact, the Arb SCLK parameter is a duplicate of the
SCLK setting in the ARB panel and the Stroke Number duplicates
the segment number in the same panel. The Offset Start, Stop and
Step are unique for each channel as they simulate character
movement speed and direction on the video monitor.
To change the video stroke parameters, point and click on the
parameter. The value that is associated with the lit LED is displayed
on the digital display. You can use the dial, keyboard, or the [
↑
] [
↓
}
keys to adjust the readout to the required setting. After you modify the
reading, press Execute to update the 3156B with the new reading.
The Circulation Mode has two options: Single and Continuous. Both
options require an enable command to move the characters about the
screen. The Single option moves a single step for each trigger and the
Continuous option requires one enable signal to trigger one complete
movement sequence.
Enable
The Enable Group affects the 3156B only when the operate enable
source is set to software (software is the default enable source). If the
output state is on, clicking on the operate Enable button will stimulate
the output. In some cases, the disable can stop the output. The
various options to enable and disable the output waveforms, using the
enable commands are given in Table 3-2. Note that for video mode,
only external triggers enable stroke movement and therefore, the
Enable group has no effect on this mode.
The Utility Panel
The Utility panel, as shown in Figure 4-15, is invoked by pressing the
UTIL button. The Utility panel provides access to general instrument
references that are not directly related to waveform generation.
Through this panel you can read information that is available
specifically for service and information purposes
The
Serial Number
returns the same number as printed on your serial
number label
The
Installed Option
returns either “0” for no option or “1” for TCXO
option
The
Calibration Date
returns a date of which the instrument was last
calibrated. Calibration cycle is normally 3 years so if the current date is
over three years since last calibrated, make sure the 3156B is
returned to the factory for calibration.
The Address Space returns A24 or A32, depending on your internal
switch setting. The factory default is A32.
