SPD List of Useful Commands

l

- Sets the global display type and changes all current panels to display the lag spectrum.

a

- Sets the global display type and changes all current panels to display the amplitude of the frequency spectrum.

p

- Sets the global display type and changes all current panels to display the phase of the frequency spectrum.

d

- Sets the global display type and changes all current panels to display the amplitude difference of the frequency spectrum, using a previously stored reference.

r

- Sets the global display type and changes all current panels to display the real part of the frequency spectrum.

i

- Sets the global display type and changes all current panels to display the imaginary part of the frequency spectrum.

x

- For frequency domain plots, toggles the X axis units between frequency and channel number.

array 123456

- In baseline mode, defines the currently active antennas.
Examples:

	$>$ array 1346		Defines 1,3,4,6 as active, and antennas 2,5 as inactive.
	$>$ array		Prints out the currently active antennas.

bins

- In baseline mode, and when time or pulsar binning is active, defines the currently selected time bins.
Examples:

	$>$ bins 1-5 10-16		Selects bins 1 to 5 for frequency one, 10 to 16 for frequency 2.
	$>$ bins 1.3.5 10.11		Selects bins 1,3 & 5 for frequency one, 10 & 11 for frequency 2.
	$>$ bins		Prints out the currently selected bins.

on$\vert$off

- In baseline mode, defines which polarisations are enabled.
Examples:

	$>$ on ab ba cd dc		Turns on display of all cross-polarisation products.
	$>$ off cc cd dc dd		Turns off all second frequency polarisation products.
	$>$on		Displays which types are currently on.

scale

- Allows the plots to be scaled on the Y axis. The default is auto-scaling.
Examples:

	$>$ scale l -0.01 0.01		Scales lag plots to cover the range -0.01 to 0.01.
	$>$ scale b 0 200		Scales bin profile plots to cover the range 0 to 200.
	$>$ scale a		Returns to auto-scaling for amplitude plots.
	$>$ scale		Autoscales all plots.

channels

- Allows a selection of a range of frequency channels to plot. The default is all channels.
Examples:

	$>$ channels [f1] 100 200		Displays channel range 100 to 200 in frequency band 1.
	$>$ channels f2 200 500		Displays channel range 200 to 500 in frequency band 2.
	$>$ channels		Resets channel selections to defaults.

lags

- Allows a selection of a range of lag channels to plot. The default is all channels.
Examples:

	$>$ lags -800 100		Displays lag channel range -800 to 100.
	$>$ lags		Resets channel selections to default.

bpbins$\vert$ppbins

- In baseline mode, and when time or pulsar binning is active, defines the range of bins over which the bin profile is plotted.
Examples:

	$>$ bpbins 20 30		Displays the bin profile for bins 20 to 30.
	$>$ ppbins		Resets to the full range of available bins.

avg

- When the next data arrives, resets the averaging buffers and starts a vector averaging in time of the frequency spectra. This also results in a time averaging of the bin profile.

noavg

- When the next data arrives, reverts to non-averaging mode.

save

- Saves the current frequency spectra in a stored reference area.

auto

- Enables an automatic averaging mode where the averaging is reset at the start of each scan. If the scan is on a reference position then the averaged data will be saved in the reference area and subsequent signal scans will be displayed as quotient spectra.

noauto

- Disable automatic averaging mode.

layout

- Controls the layout of plot panels. The default layout is the smallest square (NxN) layout which will contain the number of plot panels, with the exception that a two panel layout defaults to 1x2, representing : (number of panels in X) x (number of panels in Y).
Examples:

	$>$ layout 3x4		3 panels in X by 4 panels in Y.
	$>$ layout 0x0		Reverts to default layout.
	$>$ layout		Prints out current layout.

write

[colour] [filename] - Writes a [colour] postscript file of the current display to the filename, if given, otherwise to a constructed filename which includes date and time. The path used is the environment variable SPD_HARDCOPY, if defined, otherwise the directory from which SPD was started. A message is printed identifying the actual filename used.

quit

- Exits the program.