Purpose

Window the blue CCD and acquire a series of images cenetered at
the current blue CCD focus setting. Use the goitrapb command
for taking data. Use single-amp readout mode.

Usage

oneampfocusb [n [center_focus [incr]]]

Arguments

n = number of images to acquire [default = 7]
center_focus = central focus value [default = current focus]
incr = focus increment between consecutive exposures [default=40 microns]

Output

none

Side effects

- Images are acquired and the blue focus is changed

Note

If the script is interrupted, the original focus value, CCD
windowing, and output filename prefix are restored.

Exit values

0 = normal completion
1 = wrong number of arguments

Example

1) Take a sequence of 7 BLUE exposures centered at the current focus

with the standard focus step

oneampfocusb

2) Take a sequence of 11 BLUE exposures centered at -2100 microns

with a step of 50 microns

oneampfocusb 11 -2100 50