Last Update: 25th December 2018
Enter a name of the device table. A configuration file will be saved under your working directory with the name of
<the name of the Device Table you defined>.cdevice
The limitations of a filename of the device table are as folllows:
NOTE: You can save the input parameters anytime you want (the nobs allows you to save the scan table even if some mandatory fields still blank). The nobs does not check whether these input parameters follow the rules at that time.
Click the Check button for a basic check of the parameters. The nobs calculates and compares the relations of the Track Freq. and IF freq.. If an input value violates the setup rules, the nobs notifies the error in the information box at the bottom-right corner.
The observatory provides numbers of sample files according to the following naming rules:
'f': FOREST, 'h40eq2': H40 using Equalizer 2, 'h40eq3': H40 using Equalizer 3,
't70': T70, 'z40': Z45, and 'h22': H22, 'h22h40': simultaneous observation using H22 and H40.
'usb_l': USB-L, 'lsb_l': LSB-L, 'usb_h': USB-H, and 'lsb_h': LSB-H for FOREST.
'usb': USB, and 'lsb': LSB for T70 receiver
Screenshots of each sample file and their concrete meanings are shown on the following page.
List of Sample Files of Device Table
When you make an observation script for pointing observations, the observatory recommends using the sample device file named 'conth40eq2.cdevicea'. This sample table uses H40 receiver using Equalizer 2. (If you do not have a specific reason, please use Equalizer 2. Equalizer 3 needs an additional setup before observations.)Scroll back to the Top
You can use this space to leave any memo for the device table. A character limit is 100, and a line break is prohibited.
In the frontend tab, users choose a receiver and set its target frequency range.
Check the receiver (Frontend) with sideband information is correctly selected.
Names of available receivers are:
Check an appropriate combination of IF and sideband is chosen.
|Name||Sideband||Available Receiver||IF Range (GHz)|
|USB-L||Upper Sideband||H22, H40, Z45, T70, and FOREST||5-7 (for H22 and H40)
4-8 (for Z45, T70, and FOREST)
|LSB-L||Lower Sideband||T70 and FOREST||4-8|
In most cases, users can choose any IF listed above (a combination itself cannot be changed by yourself). However, for FOREST, users cannot use USB-L and LSB-H simultaneously due to mechanical connections.
Specify tracking frequency in GHz.
|Frontend||Tuning Range (GHz)||LO Frequency Range (GHz)|
|H22||USB: 20 -25||14 - 19|
|H40||USB: 42.5 - 44.5||36.5 - 38.5|
|Z45||USB: 42 - 46||36 - 40|
|T70||LSB: 67 - 92, USB: 79 - 108||75 - 100|
|FOREST||LSB: 80 - 108, USB: 90 - 116||86 - 112|
This is the centre frequency of the continuum. Bandwidth for continuum observations is as follows:
|FE||# of channels||Bandwidth (GHz)||Notes|
|Single||2||2 (5 - 7 GHz)|
|H22 & H40||3 (2 & 1)||2 (5 - 7 GHz)||From Semester 2018B|
This user-specified intermediate frequency (in GHz) is the frequency that the "Tracking Frequency" is down-converted into.
In other words, FIF = Ftrack +/- FLO,
where FIF is the Intermediate Frequency, Ftrack is the Tracking Frequency, FLO is the Local Oscillator Frequency, and the +/- sign is determined from the sideband you chose: + for USB and - for LSB. In case that more than one IF is chosen, please all local oscillator frequency fLO have the same value.
This section describes which total power detector will be connected to the receiver that radio will be guided. Since the observatory is already fixed which total power detector should be used for a specified receiver, the user do not need to change this section while the user select an appropriate sample file.
Select which the total power detector will be used.
Specify which channel will be used for a quick look monitor.