10 October

Updates etc. in the Container:

• RCU modem firmware upgrade to version V12. This removes the DC from the communication line when it is not used.
• Upgrade of the firmware of the TBB boot-loader. This is to improve the stability of the boards. (Less TBBs stuck in  "not available" and needing a 24V reset.)
• RCU number 10 replaced, it had low gain in LBH

LBA work:

• replaced the antennas number: 4, 6, 19, 22, 27, 34, 35, 36, 37, 38, 39, 41, 43, 46, 52, 65, 69, 74, 75, 76, 82, 89, 92 (to get the RCU number multiply by two)
• LBA 19 has one broken cable.

HBA work:

• Replaced HBA frontend boards (tile-number - FE-number): 19 - 15, 20 - 7, 20 - 11, 34 - 7, 52 - 15, 53 - 14, 71 - 9, 89 - 16

Tests

• Tested all antenneas and elements with a test transmitter.
• Polarization tests of the HBA did not work, there is not enough space to put the test transmitter at the right distance in the right direction.

Testing the station:

HBAs are all fine as far as I can test:

• modemtest without errors
• all tiles gave a good looking signal

LBAs:

• RCU 74: low-power
• RCU 119: high power at low frequencies, went away after going to rcumode 2 and back
• all other LBAs are fine.

Olaf's cross-correlation tests:

The HBAs seem fine.

At the LBAs ther are the following problems:

• rcu 39 sometimes high
• rcu 68 low (but stable)
• rcu 74 low (but stable)
• rcu 119 often high