TBASERDN040130

January 30, 2004

Q-band receiver in the Equipment Room, cold.  Using lab 83620 as LO1,
set at 9250MHz.  Connected IF of L2 and R2 to OR 1 and 3 respectively,
by coax.

L2 -> OR1 -> CM1 -> SF1 -> ACS J1 (bank 1, rcvr 1)
	     CM2 -> SF2 -> ACS J3 (bank 2, rcvr 1)

R2 -> OR3 -> CM5 -> SF5 -> ACS J2 (bank 1, rcvr 2)
	     CM6 -> SF6 -> ACS J4 (bank 2, rcvr 2)

T=120s, integration=10s.

Scans 3-8 with Room Temp Load on window.

Scans 10-14 with LN2 load on window.

File qL2ovld.ps and qR2ovld.ps show the Ta/Tsys baselines for scan pairs 3-8
overlaid with those for scans 10-14.  The BLs with obvious ripple are those of
scans 10-14.  Note that the Tsys decreased by a factor of three in the
scans with the LN2 load in place, as shown for L2 in qL2tsys.ps (red
is scan 3 and green is scan 10).