a) Hydrogen maser
time and frequency reference: frequency stability 1014 to
1015
(b) Dual frequency S- and X-band front end
receivers with concentric LCP feeds for simultaneous S- and X-band
observations. L-band capability.
(c) Closed cycle helium cooling system for front
end receivers.
(d) System temperatures approximately 55 deg K for
X-band and 60 deg K for S-band
(e) S-band IF
i. S-Band first LO is 2020 MHz
ii. Maximum receiver noise power density: -44 dBm
Hz-1 at 191 MHz
iii. –3 dB points at 173 MHz and 283 MHz
iv. –10 dB points at 132 MHz and 437 MHz
v. –20 dB points at 132 MHz and 462 MHz
vi. Linear portion of passband from 191 MHz to 425
MHz
(f) X-Band IF
i. X-Band first LO is 8080 MHz
ii. Maximum receiver noise power density: -49 dBm
Hz-1 at 152 MHz
iii. -3dB points at 83 MHz and 317 MHz
iv. -10dB points at 60 MHz and 613 MHz
v. -20dB points at 37 MHz and 920 MHz
vi. Linear portion of passband from 132 MHz to 902
MHz
(g) L-Band IF
i. L-Band first Local Oscillator is 1010 MHz
ii. Receiver Noise Temperature 0.78 COLD, 2.983
HOT.
iii. IF output frequency 285 MHz, 110 MHz bandwidth
(3 dB)
iv. LNA noise temperature 31 degree K and gain of
39 dB.
v. Passband 1150 to 1750 MHz
(h) VLBI data acquisition system backend. Dual
Frequency X- and S-band operation with USB and LSB outputs for both RF
channels. Baseband bandwidths variable from 250 kHz to 16 MHz. 1-
and 2-bit sampling and recording.
(i) GPS active control point (location reference
station).
