Instrumentation Overview

The WHSF Spectrometer

Updated on November 1, 2017

Specifications

The WHSF is an FX-type spectrometer. Two observing modes, i.e., 4,096 MHz width mode and 2,048 MHz width mode, are available. See Table 1 for a summary of the correlator specification. If you have any questions about the WHSF, please contact the helpdesk.

Table 1. Specification of the WHSF spectrometer.
Instrument	Mode	# of IF	IF Freq. (MHz)	Bandwidth (MHz)	N_chan	Spectral resolution	Velocity resolution at 350 GHz	Velocity coverage at 350 GHz
WHSF	FX	2	4096-8192	4096	2048	2.0 MHz	1.7 km/s	3511 km/s
		4	4096-6144	2048		1.0 MHz	0.86 km/s	1755 km/s
		4	4096-6144	1024		0.5 MHz	0.43 km/s	878 km/s
	F-FX	2	4096-8192	64		31.25 kHz	27 m/s	55 km/s
	F-FX	4	4096-6144	32		15.625 kHz	13 m/s	27 km/s

Table 2. Available IF Configurations of the WHSF.
Instrument	Mode	Bandwidth (MHz)	# of IF	IF#1	IF#2	IF#3	IF#4
WHSF	FX F-FX	4096 64	2	P0USB	P0LSB	N/A	N/A
				P1LSB	P1USB	N/A	N/A
				P0USB	P1USB	N/A	N/A
				P1LSB	P0LSB	N/A	N/A
	FX F-FX	2048 32	4	P0USB	P1LSB	P1USB	P0LSB
				P0USB	P0USB	P0LSB	P0LSB
				P1LSB	P1LSB	P1USB	P1USB