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Dave: There is a standard Point-Point 30MHz channel allocation centered at 6197.24 MHz which fits.
Vivek via vla-test-maint: https://science.nrao.edu/facilities/vla/observing/RFI/Oct-2021-B-configuration/C-Band_spectra_202110B
Dave update: I have not had a chance to make any measurements at the site yet but the interference appears to be consistent with what was identified in https://bugs.nrao.edu/browse/WO-7315 first opened in July, 2020. The interference is from a microwave link transmitting from Gray Hill to Smith-Bagley west of Datil. This link traverses the North Arm and almost directly across BN7. The interference detected on the West Arm is likely a sidelobe of the microwave antenna.
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2021-22 B config:
always - ea18 [N28], ea22 [N24], ea24 [W36]
sometimes - ea06 [N32], ea17 [N36], ea18 [N28ea26 [W32]
2022 A config:
ea13 [W48], ea22 ea19 [N24E48], ea24 ea22 [W36N24], ea26 [W32]
ea18,ea22,ea24 A2C2 always have it, though sometimes mild. ea06,ea17,ea26 occasionally have it.
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Easily seen in finalcals stage of pipeline, "final amp time cal" and "final amp freq cal" tabs.
example pipeline products here:
/lustre/aoc/projects/srdp/problem_data/C_band/
previews below:
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