Last Update: 21st June, 2016

Frontend

Receivers

H22

Parameter Value Notes
# of Beams 1
Polarizations per Beam RHCP
LHCP
Receiver Type HEMT
RF Frequency Coverage (GHz) 20 - 25
IF Frequency Range (GHz) USB: 5 - 7
LO Frequency Range (GHz) 14 - 19
Tsys (K) typ. 100

H40

Parameter Value Notes
# of Beams 1
Polarizations per Beam LHCP
Receiver Type HEMT
RF Frequency Coverage (GHz) 42.5 - 44.5
IF Frequency Range (GHz) USB: 5 - 7
LO Frequency Range (GHz) 36 - 40
Tsys (K) typ. 150

Z45

Parameter Value Notes
# of Beams 1
Polarizations per Beam H
V
Receiver Type HEMT
RF Frequency Coverage (GHz) 42 - 46
IF Frequency Range (GHz) USB: 4 - 8
LO Frequency Range (GHz) 36 - 40
Tsys (K) typ. 100

T70

Parameter Value Notes
# of Beams 1
Polarizations per Beam H
V
Receiver Type SIS (2SB)
RF Frequency Coverage (GHz) 71.5 - 92
IF Frequency Range (GHz) USB: 4 - 8
LSB: 4 - 8
LO Frequency Range (GHz) 75 - 100
Tsys (K) typ. 120 - 270




Figure 1: System noise temperature of T70.

TZ

Parameter Value Notes
# of Beams 1 (+1)
Polarizations per Beam H
V
Receiver Type SIS (2SB)
RF Frequency Coverage (GHz) 80 - 116
IF Frequency Range (GHz) USB: 4 - 8
LSB: 4 - 8
LO Frequency Range (GHz) 86 - 110
Tsys (K) typ. 150 - 300




Figure 2: System noise temperature of TZ.

FOREST (FOur-beam REceiver System on the 45-m Telescope)

Parameter Value Notes
# of Beams 4
Polarizations per Beam H
V
Receiver Type SIS (2SB)
RF Frequency Coverage (GHz) 80 - 116
IF Frequency Range (GHz) USB-L: 4 - 8
USB-H: 7 - 11
LSB(-L): 4 - 8
LO Frequency Range (GHz) 86 - 116
Tsys (K) typ. 150 - 300




Figure 3: System noise temperature of FOREST.

Detailed Information on Frequnecy Down-Conversions in FOREST and IF Chain




Figure 4: Schematic diagram of frequency down-conversions from 2SB mixer to AD converters.

Table 1: Available Patterns of Connections
Notes:

2016-06-21