GMRT ANTENNA UPGRADATION STATUS
Ant Name | Ant ID | UPS | LO FSW | Broad-band RF | Servo PC104 | GAB 2-POL FSW | BLDC | 130MHz-260MHz | 250MHz-500MHz | 550MHz-900MHz | Common Box | RABBIT MCM for FE | Ant Name | ||||||||||||||||||||
OFC | LPF CH1 | FEED | FE | NF | Temp | PM | NG | FEED | FE | NF | Temp | PM | SBF | NG | FEED | FE | SBF | NF | PM | Temp | NG | Amp | Temp | PM | |||||||||
C00 | 7 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| C00 |
C01 | 6 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| C01 |
C02 | 5 | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| √ | C02 |
C03 | 1 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| C03 |
C04 | 3 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| C04 |
C05 | 19 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| √ | C05 |
C06 | 20 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| C06 |
C08 | 24 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| C08 |
C09 | 4 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| C09 |
C10 | 12 | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
| √ | C10 |
C11 | 9 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| C11 |
C12 | 2 | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| √ | C12 |
C13 | 11 | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| C13 |
C14 | 10 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| C14 |
W01 | 8 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| W01 |
W02 | 13 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| W02 |
W03 | 14 |
|
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| W03 |
W04 | 15 |
|
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| W04 |
W05 | 16 |
| √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| W05 |
W06 | 25 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| W06 |
E02 | 17 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| E02 |
E03 | 18 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| E03 |
E04 | 21 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| E04 |
E05 | 22 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| E05 |
E06 | 23 |
| √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| E06 |
S01 | 26 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| S01 |
S02 | 27 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| S02 |
S03 | 28 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
| S03 |
S04 | 29 | √ |
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| S04 |
S06 | 30 | √ | √ | √ |
| √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
|
|
| S06 |
TOTAL | 26 | 13 | 30 | 10 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 16 | 7 | 7 | 4 | TOTAL |
Conventions used in above table:
OFC – Optical Fibre Cable, LPF – Low Pass Filter, FE – Front End, NF – Notch Filter, Temp – Temperature monitoring, PM – Power Monitoring, SBF – Sub-Band Filter, NG – Noise Generator, Amp – Amplifire etc.
LIST of ANTENNAS under PAINTING | ||
Weekdays | SUNDAY To FRIDAY | MONDAY To SATURDAY |
Antennas under painting |
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|
Upgradation jobs with respect to antennas : ww antennas with UPS ww antennas without UPS.
130MHz-260MHz - Dual-Ring Feed @ 150MHz 250MHz-500MHz - Cone-Dipole Feed @ 325MHz 550MHz-900MHz -Cone-Dipole Feed @ 610MHz
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Antenna status as per completion of up-gradation jobs :
Servo (PC104) | Broad Band RF (OFC) | LOFSW | Broad Band Feed | Antenas with BLDC | Antenna Diesel Generator Alarm | Antennas with UPS | ||
130-260 MHz @ 150MHz | 250-500 MHz @ 325MHz | 550-900 MHz @ 610MHz | ||||||
ALL 30 ANTENNAS DONE. | ALL 30 ANTENNAS DONE. | C02, C05, C10, C12, C14,W02,W05, W06, E03,E06, S01, S02, S06 | ALL 30 Antennas DONE.
| ALL 30 Antennas DONE. | ALL 30 Antennas DONE. | ALL 30 Antennas DONE. | E04, E05, E06, W03, W04, W05, W06, S03, S04, S06. | 26 Antennas DONE. [Antennas Remaining : E06 W03 W04 W05] |
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GWB (GMRT WIDE-BAND BACK-END) :
This is the New Correlator Back-end at GMRT in the Broad-band RF Signal receiver chain.
Broad-Band RF From Antenna is taken to the GAB (GMRT Analog backend) through upgraded Optical Fiber. All antennas can be configured and monitored at GAB, and out of which any 32 antennas with Broadband Feed and RF facilities listed above for 1pol or any 16 antennas with dual pol can be chosen for GWB.
GWB-IV (version 4) is the latest release, It accepts 64 input connections. These 64 input connections can be configured as 32 antennas Dual polarization inputs. (either Total Intensity or Full Stokes).
This release supports, 400/200/100 MHz wide band observations with maximum16 K spectral channels can be configured. Also, 4 Beam selections including raw voltage and coherent de-dispersion pipeline are available for pulsar observations with varying beam integration values ( in ms). This release also supports multi-sub-array observations. Detailed release configuration of GWB is as in table below:
GWB-IV supports various available modes for pulsar, continuum and line frequency observations. Best possible mode, depending on user requirement can be chosen using gwb4calculator.pl on astro8 machine.
| 400 MHz (TI/FS) | 200 MHz (TI/FS) | 100 MHz (TI/FS) | 50 MHz (TI/FS) | 25 MHz (TI/FS) | 12.5 MHz (TI/FS) | 6.25 MHz (TI/FS) | 3.125 MHz (TI/FS) | 1.5625 MHz (TI/FS) |
1024 Channels | √ | √ | √ | √ | √ | √ | √ | √ | √ |
2048 Channels | √ | √ | √ | √ | √ | √ | √ | √ | √ |
4096 Channels | √ | √ | √ | √ | √ | √ | √ | √ | √ |
8192 Channels | √ | √ | √ | √ | √ | √ | √ | √ | √ |
16384 Channels | √ | √ | √ | √ | √ | √ | √ | √ | √ |
allant;cp 0;defs 0;suba 0;
for more details please refer file - `lenyadri:/odisk/online1/INFO/GAB_ONLINE.SOP`
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Settings for 150 / 235 MHz | ||||
Antenna | FEED | RF | LO (for 150 MHz) | LO (for 235 MHz) |
ALL 30 Antennas DONE... | 150 | 150 | 218 | 304 |
250-500 Broadband FEED (VERSION 2 - FINAL) : | 550-900 Broadband FEED (VERSION 2 - FINAL) : |
The command for the selection has to run from cdsetm file (on shivneri/lenyadri) in the control room. 1. For full band (250-500 MHz) Observation: a) Using cdset4, use default 325 MHz RF command b) Using cdsetm, use RF as 470 MHz to get full band
2. For sub-band observation use cdsetm command to set RF bands as follows a) For band 1: 250-350 MHz => RF setting 290 b) For band 2: 300-400 MHz => RF setting 325 c) For Band 3: 350-450 MHz => RF setting 350 d) For Band 4: 420-500 MHz => RF setting 410 e) For Full band (250-500 MHz) => RF setting 470.
Antennas with 250-500 MHz Ver2 : (USE - cdsetX/cdsetXm) All Antennas DONE... |
The command for the selection has to run from cdsetm file (on shivneri/lenyadri) in the control room. The command are as follows:
Band Command 1. RF 550-900 MHz (Full-Band): 725 MHz. 2. RF 550-650 MHz (Sub-Band): 600 MHz. 3. RF 635-735 MHz (Sub-Band): 685 MHz. 4. RF 720-820 MHz (Sub-Band): 770 MHz. 5. RF 800-900 MHz (Sub-Band): 850 MHz.
Antennas with 550-900 MHz ver2 (final) : (USE - cdsetX/cdsetXm) All Antennas DONE... |
MCM-4 ( FE Parameter control Unit) through online CDSETM4 (C02 and C05):
Antennas Central Square are enabled with MCM 4, to set upgraded FE parameters. The required command set has been modified and implemented by Mr. Jitendra. The SOP for issuing the Control command for FES parameters as follows:
Add MCM-4 in 'online'
use 'cdsetm4' for FES parameter setting
'run fe4mcm' --To execute parameters setting
Please Ensure that now onwards for Central Square antenna all FES parameters ( walsh, noise and mcm) has to be executed using 'cdsetm4' only
** For 325 MHz : use broad-band feed instructions ad mentioned under Para A above.
** For Non Broad band antennas from User need to set Full Band settings, while doing observations with Sub-bands for Upgraded feed.
Notes :
●Dual Band observations (235 & 610) is not possible for antennas with 550-900 CDF at 610 FPS position is installed.
●Antennas with new Broadband 150 MHz feed installed, 150 MHz and 235 MHz can be used with 150 MHz feed in focus and 150 MHz RF and respective LO values for 150 MHz and 235 MHz frequency band observations.
●Antennas those are not upgraded for 150 and upgraded for 610 MHz can not be used for 235 MHz observations.
●Antennas those are upgraded for 150 and not upgraded for 610 MHz can not be used for 235 MHz observations.
●Note : Satellite Notch Filter (230-275 MHz) Only In CH1 are putted in Rx Room in C06 and E02 Antenna.
●To set 325 MHz Full band use RF= 325 in cdset1-4 or RF = 470 in cdsetm files.
●Noise cal setttings will not work for antennas C04, C06, C10, W01, W04, W06, E02, E06, S02, S04 for Broad band Feed @ 325MHz (250-500MHz).
●"Diesel Generator ON" alarm is enabled in the control room. Whenever a Diesel generator of any antenna(s) is running, control room will get an audio alarm with text message. Text message contains time, sub-array and antenna name. This alarm will works only for E04, E05, E06, W03, W04, W05, W06, S03, S04, S06.
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Last Updated on 30th January 2018.
Email : nilesh@gmrt.ncra.tifr.res.in