LO1TBL Binary Table

The LO1 calculates a time-tagged series of values of LO1FREQ throughout the scan, sampled finely enough so that the commanded value will always be within REQDPTOL of the ideal value. In the case of no Doppler tracking, the table will simply contain a single entry that represents the value used throughout the scan.

In the case of Doppler tracking during position switching, the LO1FREQ will be updated asynchronously to the backend integrations, at the specified time. The LO1 will assert blanking while the transition is being made. In the case of Doppler tracking while frequency switching, the current time will be checked on each SIG/REF transition. Should a new value of LO1FREQ be required within the next switch period, this will be applied on the SIG/REF transition at the start of the next switch period.

In both of these cases, the table will therefore contain a series of LO1FREQ values, with the DJMD column representing the time at which each new frequency was commanded.

The content of the LO1TBL is described in table 1.

Table 1: Table format for LO1TBL binary table

Name	Type	Units
DMJD	1D	days
RA	1D	degrees
DEC	1D	degrees
LO1FREQ	1D	Hertz
VFRAME	1D	$\frac{m}{Sec}$
RVSYS	1D	$\frac{m}{Sec}$