R&S ZVA Repairs
1177.5333.02 3.73 E-11
Replacing Frequency Reference Board A100
(See Chapter 5, Spare Parts List, Item 120 and drawings 1145.1110, 1164.1770)
Opening the instrument and replacing the board
Turn off the instrument and disconnect from the mains, screw off the 4 rear-panel feet (460) and
pull off the enclosure (400) backwards.
Lift off the instrument top cover (296) after undoing the screws (298).
Extract the frequency reference board (120).
Installing the board and reassembling the instrument
Insert the new board into the instrument
Refit the instrument top cover (296) with the screws (298).
Push the enclosure (400) back on and screw the 4 rear-panel feet (460) into position.
Connect the mains cable, turn on at the mains switch and press the ON key.
Select Service Level 2 (see Service Functions).
When the instrument has been started, check the protocol file for errors:
[ INFO : Error Log ]
Converting R&S ZVA24(40) 4Ports to R&S ZVA24(40) 4Ports with
four phasesynchronized sources (Model 28 or 48)
(See Chapter 5, drawings 1145.1110, 1145.1310)
Use Conversion Kit ZVA24-U5 or ZVA40-U5 with installation instruction.
Open the instrument and remove the reflectometers (see chapter Replacing a Reflectometer
RMxx A510 to A540).
Remove the synthesizer boards.
Mount the new RF cables.
Insert the new synthesizer boards from the conversion kit (for positions see installation instruction).
N.B.: The C. I. of the Frequency Reference Board must be 11.00 at least. If it is lower the board
must also be changed.
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