Summary of Engineering Checkout    
                            rev. 12/27/02
Passes Passes Mode Name Description Sampling Number Number of Polarization Which Switching Signals     Which fits file Comments
Engineering Astronom.   Bandwidth levels of Samplers quadrants Cross_prod. Quadrants S/R CAL Bland samplers    
Checkout Checkout                       fits file directory: /home/gbtdata/  
                          Atest/Spectrometer  
X   1N1-0A-12-9 12.5 MHz 9 1 1 No 0       LSS 0 2002_04_25_15:01:55A Approved by Rick; see low level 6 KHz harmonics
X   2N1-4A-12-9 12.5 MHz 9 1 2 No 0, 1       LSS 0 2002_04_25_15:16:41A Approved by Rick; see low level 6 KHz harmonics
X   4N1-6A-12-9 12.5 MHz 9 1 4 No 0, 1, 2, 3       LSS 0 2002_04_25_18:47:05A Approved by Rick; see low level 6 KHz harmonics
X   1N1-0A-12-9 12.5 MHz 9 1 1 No 0       LSS 0 2002_06_18_14:38:45A Approved by Rick
X   4N1-6A-12-9 12.5 MHz 9 1 4 No 0, 1, 2, 3       LSS 0 2002_08_28_17:33:17A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N1-6B-12-9 12.5 MHz 9 1 4 No 0, 1, 2, 3       LSS 8 2002_08_28_18:05:39A Approved by Rick; birdies in spectrum are from the test fixture.
    4N1-6C-12-9 12.5 MHz 9 1 4 No 0, 1, 2, 3       LSS 16   Advertised mode that needs to be tested.
    4N1-6D-12-9 12.5 MHz 9 1 4 No 0, 1, 2, 3       LSS 24   Advertised mode that needs to be tested.
X   1N2-2C-12-9 12.5 MHz 9 2 1 No 2       LSS 16, 20 2002_05_13_19:02:02C Approved by Rick
X   1N2-3D-12-9 12.5 MHz 9 2 1 No 3       LSS 24, 28 2002_05_13_19:02:02D Approved by Rick
X   2N2-4A-12-9 12.5 MHz 9 2 2 No 0, 1       LSS 0, 4 2002_04_25_19:02:20A Approved by Rick; high offset in second channel due to offset in sampler
X   4N2-6A-12-9 12.5 MHz 9 2 4 No 0, 1, 2, 3       LSS 0, 4 2002_04_25_19:21:55A Approved by Rick; high offset in second channel due to offset in sampler
X X 1N2-0A-12-9 12.5 MHz 9 2 1 No 0       LSS 0, 4 2002_06_18_17:04:56A Approved by Rick
X   4N2-6A-12-9 12.5 MHz 9 2 4 No 0, 1, 2, 3       LSS 0, 4 2002_08_28_17:39:37A Approved by Rick; birdies in spectrum are from the test fixture.  There are very small
(1/500,000 of zero lag value) level difference in the four quadrants.  This is probably the
cause of ringing one sees at the very low frequency end of the spectrum.
X   4N2-6B-12-9 12.5 MHz 9 2 4 No 0, 1, 2, 3       LSS 8, 12 2002_08_28_18:17:54A Approved by Rick; birdies in spectrum are from the test fixture.
    4N2-6C-12-9 12.5 MHz 9 2 4 No 0, 1, 2, 3       LSS 16, 20   Advertised mode that needs to be tested.
    4N2-6D-12-9 12.5 MHz 9 2 4 No 0, 1, 2, 3       LSS 24, 28   Advertised mode that needs to be tested.
X X 1N4-0A-12-9 12.5 MHz 9 4 1 No 0       LSS 0, 1, 4, 5 2002_08_6_14:33:49A Approved by Rick
    1N4-1B-12-9 12.5 MHz 9 4 1 No 1       LSS 8, 9, 12, 13 2002_05_13_17:31:48B Rick examined.  Found problems that need to be resolved
    1N4-2C-12-9 12.5 MHz 9 4 1 No 2       LSS 16, 17, 20, 21 2002_05_13_18:13:12C Rick examined.  Found problems that need to be resolved
    1N4-3D-12-9 12.5 MHz 9 4 1 No 3       LSS 24, 25, 28, 29 2002_05_13_18:42:29D Rick examined.  Found problems that need to be resolved
X   2N4-4A-12-9 12.5 MHz 9 4 2 No 0       LSS 0, 1, 4, 5 2002_08_6_18:51:32A Approved by Rick.  Need to fix offset in sampler 3
    2N4-5B-12-9                       Test in multi-bank mode.  Find cause of subtle structure in smoothed spectrum 
X   4N4-6A-12-9 12.5 MHz 9 4 4 No 0, 1, 2, 3       LSS 0, 1, 4, 5 2002_08_28_17:43:18A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N4-6B-12-9 12.5 MHz 9 4 4 No 0, 1, 2, 3       LSS 8, 9, 12, 13 2002_08_28_18:21:49A Approved by Rick; birdies in spectrum are from the test fixture.
    4N4-6C-12-9 12.5 MHz 9 4 4 No 0, 1, 2, 3       LSS 16, 17, 20, 21   Advertised mode that needs to be tested.
    4N4-6D-12-9 12.5 MHz 9 4 4 No 0, 1, 2, 3       LSS 24, 25, 28, 29   Advertised mode that needs to be tested.
    1N8-0A-12-9 12.5 MHz 9 8 1 No 0       LSS 0, 1,2,3,4,5,6,7 2002_12_10_14:07:53A.fits all stectra and acf look okay send to Rick to check
    1N8-0B-12-9 12.5 MHz 9 8 1 No 0       LSS 8,9,10,11,12,13,14,15   Required mode; needs to be tested
    2N8-4A-12-9 12.5 MHz 9 8 2 No 0, 1       LSS 0, 1,2,3,4,5,6,7 !!!!  Illegal mode  !!!! Required mode; needs to be tested
    2N8-4B-12-9 12.5 MHz 9 8 2 No 0, 1       LSS 8,9,10,11,12,13,14,15 !!!!  Illegal mode  !!!! Required mode; needs to be tested
                             
                             
                             
X   1N1-0A-12-3 12.5 MHz 3 1 1 No 0       LSS 0 2002_04_25_15:16:41A Approved by Rick
X   2N1-4A-12-3 12.5 MHz 3 1 2 No 0, 1       LSS 0 2002_04_25_15:24:53A Approved by Rick
X   4N1-6A-12-3 12.5 MHz 3 1 4 No 0, 1, 2, 3       LSS 0 2002_04_25_18:51:33A Approved by Rick
X   1N2-0A-12-3 12.5 MHz 3 2 1 No 0       LSS 0, 4 2002_04_25_19:00:30A Approved by Rick; high offset in second channel due to offset in sampler
X   2N2-4A-12-3 12.5 MHz 3 2 2 No 0, 1       LSS 0, 4 2002_04_25_19:03:47A Approved by Rick; high offset in second channel due to offset in sampler
X   4N2-6A-12-3 12.5 MHz 3 2 4 No 0, 1, 2, 3       LSS 0, 4 2002_04_25_19:31:22A Approved by Rick; high offset in second channel due to offset in sampler
X   4N4-6A12-3 12.5 MHz 3 4 4 No 0, 1, 2, 3       LSS 0, 1, 4, 5 2002_08_28_17:10:51A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N4-6B-12-3 12.5 MHz 3 4 4 No 0, 1, 2, 3       LSS 8, 9, 12, 13 2002_08_28_18:26:21A Approved by Rick; birdies in spectrum are from the test fixture.
    4N4-6C-12-3 12.5 MHz 3 4 4 No 0, 1, 2, 3       LSS 16, 17, 20, 21   Advertised mode that needs to be tested.
    4N4-6D-12-3 12.5 MHz 3 4 4 No 0, 1, 2, 3       LSS 24, 25, 28, 29   Advertised mode that needs to be tested.
X   1N8-0A-12-3 12.5 MHz 3 8 1 No 0       LSS 0, 1,2,3,4,5,6,7 2002_09_13_19:48:27A Approved by Rick
X   2N8-4A-12-3 12.5 MHz 3 8 2 No 0, 1       LSS 0, 1,2,3,4,5,6,7 2002_09_13_19:50:40A Approved by Rick
-   4N8-6A-12-3 12.5 MHz 3 8 4 No 0, 1, 2, 3       LSS 0, 1,2,3,4,5,6,7 2002_09_13_19:52:53A Last quarter of lag values in channels 1, 2, 3, 4, and 8 are slightly higher than other lag
values.  There's a hint of this offset in channels 5, 6, 7, but it's not as obvious.  Spectra
look OK but need to find the cuase of the problem with the ACF values.
Retested 10_22_02. Same result. 2002_10_22_14:40:00A.
                             
                            Note: 32 sampler modes not available due to IF limitations
                            Note: 8 and 16 sampler modes advertised on the web are obtained by using combinations of 2 and
4 samplers modes in  2 and 4 quadrants.
                             
X X 1N2-0A-50-9 50 MHz 9 2 1 No 0       LSS 0,4 2002_08_29_14:45:14A Approved by Rick
X   4N1-6A-50-9 50 MHz 9 1 4 No 0,1,2,3       LSS 0 2002_08_29_14:53:44A Approved by Rick
X   4N2-6A-50-9 50 MHz 9 2 4 No 0,1,2,3       LSS 0,4 2002_08_29_14:59:03A Approved by Rick
X   1N4-0A-50-9 50 MHz 9 4 1 No 0       LSS 0,1,4,5 2002_08_06_15:45:33A Approved by Rick
X   2N4-4A-50-9 50 MHz 9 4 2 No 0, 1       LSS 0,1,4,5 2002_08_06_15:50:04A Approved by Rick.  Tested in multi-bank mode.  Fix offset in LSS 4
X   2N4-5B-50-9 50 MHz 9 4 2 No 2,3       LSS 8, 9, 12, 13 2002_12_11_20:46:23B Approved by Rick.  Tested in multi-bank mode.  Fix offset in LSS 4
X   4N4-6A-50-9 50 MHz 9 4 4 No 0,1,2,3       LSS 0,1,4,5 2002_08_22_16:07:41A Approved by Rick
X   1N4-0B-50-9 50 MHz 9 4 1 No 0       LSS 8, 9, 12, 13 2002_08_07_20:24:42A Approved by Rick
X   2N4-4B-50-9 50 MHz 9 4 2 No 0, 1       LSS 8, 9, 12, 13 2002_08_07_20:27:40A Approved by Rick
X   4N4-6B-50-9 50 MHz 9 4 4 No 0, 1, 2, 3       LSS 8, 9, 12, 13 2002_10_21_18:39:24A Approved by Rick
X   1N1-0A-50-9 50 MHz 9 1 1 No 0       LSS 0 2002_08_29_15:03:57A Approved by Rick
X   1N8-0A-50-9 50 MHz 9 8 1 No 0       LSS 0, 1, 2, 3, 4, 5, 6, 7 2002_09_13_19:43:05A Approved by Rick
    1N8-0B-50-9 50 MHz 9 8 1 No 0       LSS 8, 9, 10, 11, 12, 13, 14,1 5   Required mode; needs to be tested, high priority.
    4N8-6A-50-9 50 MHz 9 8 4 No 0,1,2,3       LSS 0,1,2,3,4,5,6,7 !!!!  Illegal mode  !!!! Required mode; need to test.
    2N4-4A-50-3 50 MHz 3 4 2 No 0, 1       LSS 0,1,4,5 2002_09_05_16:47:07A Approved by Rick; birdies in spectrum are from the test fixture.
X   1N1-0A-50-3 50 MHz 3 1 1 No 0       check? 2002_09_11_15:20:09A Approved by Rick
X   4N1-6A-50-3 50 MHz 3 1 4 No 0,1,2,3       LSS 0 2002_08_28_13:18:03A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N1-6B-50-3 50 MHz 3 1 4 No 0,1,2,3       LSS 8 2002_08_28_18:43:14A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N1-6C-50-3 50 MHz 3 1 4 No 0,1,2,3       LSS 16 2002_08_29_18:56:32A Approved by Rick; birdies in spectrum are from the test fixture.
    4N1-6D-50-3 50 MHz 3 1 4 No 0,1,2,3       LSS 24 2002_09_05_17:31:51A Advertised mode that needs to be tested.  ACF has glitches.  Needs work
retsted 10_22_02. 2002_10_22_12:23:23A, 2002_10_22_12:40:46A
2002_10_22_12:43:58A
X   4N2-6A-50-3 50 MHz 3 2 4 No 0,1,2,3       LSS 0, 4 2002_08_28_15:06:41A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N2-6B-50-3 50 MHz 3 2 4 No 0,1,2,3       LSS 8, 12 2002_08_28_18:40:29A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N2-6C-50-3 50 MHz 3 2 4 No 0,1,2,3       LSS 16, 20 2002_08_29_19:02:02A Approved by Rick; birdies in spectrum are from the test fixture.
    4N2-6D-50-3 50 MHz 3 2 4 No 0,1,2,3       LSS 24, 28 2002_09_05_17:48:49A Advertised mode that needs to be tested.  ACF has glitches.  Needs work
Retsted 10_22_02. 2002_10_22_13:01:08A, 2002_10_22_13:09:36A
X   4N4-6A-50-3 50 MHz 3 4 4 No 0,1,2,3       LSS 0, 1, 4, 5 2002_08_28_15:16:31A Approved by Rick; birdies in spectrum are from the test fixture.
X   4N4-6B-50-3 50 MHz 3 4 4 No 0,1,2,3       LSS 8, 9, 12, 13 2002_08_28_18:35:29A Approved by Rick; birdies in spectrum are from the test fixture.
    4N4-6C-50-3 50 MHz 3 4 4 No 0,1,2,3       LSS 16, 17, 20, 21 2002_09_05:18:09:24A Advertised mode that needs to be tested. ACF has glitches.  Needs work.
    4N4-6D-50-3 50 MHz 3 4 4 No 0,1,2,3       LSS 24, 25, 28, 29 2002_09_05_17:56:39A Advertised mode that needs to be tested.  ACF has glitches.  Needs work
retested 10_22_02. 2002_10_22_13:42:24A, 2002_10_22_13:51:06A
2002_10_22_14:06:40A with same result.
X   1N8-0A-50-3 50 MHz 3 8 1 No 0       LSS 0, 1, 2, 3, 4, 5, 6, 7 2002_09_13_19:36:22A Approved by Rick
X   2N8-4A-50-3 50 MHz 3 8 2 No 0, 1       LSS 0, 1, 2, 3, 4, 5, 6, 7 2002_09_13_19:38:47A Approved by Rick
    4N8-6A-50-3 50 MHz 3 8 4 No 0, 1, 2, 3       LSS 0, 1, 2, 3, 4, 5, 6, 7 2002_09_13_19:40:54A Looks OK except for excess amplitude in the ACF for channel 7, lags > 31000
                            Note: 50 MHz BW using high-speed samplers is NOT available, despite being advertised on web
                            Note: 32 sampler modes not available due to IF limitations
                            Note: 8 and 16 sampler modes advertised on the web are obtained by using combinations of 2 and
2 samplers modes in  2 and 4 quadrants.
                             
X   1W1-00-200 200 MHz 3 1 1 No 0       HSS 0 2002_06_18_13:58:13A Filter is >200 MHz wide.  Approved by Rick.  Birdies in passband are from test fixture.
    1W1-11-200 200 MHz 3 1 1 No 1       HSS 1 2002_06_05_18:18:34B Rich needs to re-test with Ray's fix.
    4W1-60-200 200 MHz 3 1 4 No 0, 1, 2, 3       HSS 0 2002_06_06_14:58:29A Rich needs to re-test with Ray's fix.
X   1W2-001-200 200 MHz 3 2 1 No 0       HSS 0,1 2002_10_11_15:53:07A Filter is >200 MHz wide.  Approved by Rick.  Birdies in passband are from test fixture.
X   1W2-123-200 200 MHz 3 2 1 No 1       HSS 2, 3 2002_10_11_19:05:10B Filter is >200 MHz wide.  Approved by Rick.  Birdies in passband are from test fixture.
    1W2-245-200 200 MHz 3 2 1 No 2       HSS 4, 5 2002_10_11_19:11:42C Sampler 4 looks OK.  Possible problem with sampler 5.  Rick to evaluate.
X   1W2-067-200 200 MHz 3 2 1 No 0       HSS 6, 7 2002_10_14_13:16:24A Filter is >200 MHz wide.  Approved by Rick.  Birdies in passband are from test fixture.
    1W2-367-200 200 MHz 3 2