Next: TUNING /PAGEWIDTH
Up: NOEMA languages internal help
[NOEMAOFFLINE\]TUNING [Ftune(GHz) Sideband FIF(MHz)] [/ZOOM Key-
word] [/PAGEWIDTH] [/INFO] [/FIXED_FREQ]
Without arguments, the command displays the available bands of NOEMA Re-
ceivers. With the option /INFO several informations about the receiver
are displayed in the terminal.
Different ranges are colorized:
Black : outside the receiver bands
Dark grey : in the receiver bands, but not accessible with the present
White : in the receiver bands, accessible with the present tuning
With arguments, the command defines the tuning of one of the band and
represents it on the global view.
Ftune : Frequency to tune (in GHz)
SideBand: Sideband where to place Ftune (LSB or USB)
FIF : Position where Ftune will be placed in the IF band (in MHz)
Ftune must be in the current frequency main axis (REST by default, but
can be changed with SET FREQUENCY command)
If a source has been defined, its velocity (or redshift) is taken into
account to convert Ftune to RF frequency.
NOEMA observations are preferentially performed using a limited number
of LO frequencies for which receiver performances have been optimized.
Those frequencies are distributed all over the receiver bands every
500MHz (the so-called tuning grid). The NOEMAOFFLINE\TUNING command
takes this into account and shifts the IF center frequency FIF if
necesssary so that the LO tuning frequency matches the tuning grid.
The tuning frequency is computed using only the source LSR velocity.
With the Doppler tracking, the actual LO is slightly different from the
tuning frequency. Both tuned and tracked LO frequencies are given in
output. With the option /FIXED_FREQ, the command ignores the tuning