5. Parameters of "Device Table"

File Name : File name of "Device Table" to save.

Frontend

Receiver : Select a receiver from the list shown by pushing the right buttons.

Track Frequency : Tracking frequency.

Sideband : Only DSB mode is available.

Backend

Type : Type of backend. Default is DASBOX.

Channel Begin-End : Begin and end channel numbers which you use.

Reference Channel : Channel number of the reference signal for lock-in procedure. Default is 3.

Monitor Channel : Channel number of sky monitor. Default is 4.

Channel Notes : You can write a comment for each channel.  For use, Channel Notes Window appears.

Option : You can change parameters of the backend (In general, you don't have to change them).  For use, Option Window appears to set parameters.

Switching Mode :

Beam switch : Beam Switch Window appears to set parameters. In general, you don't have to change them.
none : Default. DC measurement.

• Channel Notes

Fig 5.2.3  Channel Notes Window


Chan (1) - (16) : Enter comment for each channel.

• Backend Option

Fig 5.2.4  Option Window


Trigger Mode : Select INT (Internal) or EXT (External).  Default is INT.

Sampling Interval : Interval of data sampling by A/D convertor.  Default is 1 msec.

Integration Time : Integration time. Default is 100 msec.

Filter Mode : Select HPF (High Pass Filter) or BPF (Band Pass Filter).  Default is HPF.

HPF Frequency : Cutoff freuency of high pass filter.  Default is 3 Hz. For BPF, this is the center frequency of band pass filter.

BPF Q : Q value (Q = f/△f) of band pass filter.  Default is 3.

LPF Frequency : Cutoff frequency of low pass filter. Default is 4.
 

• Beam Switch

Fig 5.2.6  Beam Switch Window


Chopping Angle A, B: Default is 0.0.

Load Position : Load position during observation.

SKY : Default.