Instrument Construction and Function Description R&S ZVB
1145.1078.82 3.46 E-4
Replacing the Bridge Unit (R&S ZVB4/8 only)
(
See Chapter 5, Spare Parts List, drawings 1145.1010, 1145.3664, Item 100)
Opening the instrument and removing the reflectometer
Remove the Reflectometer (see chapter Replacing a Reflectometer RM8 A510 to A540)
Removing the bridge unit
Loosen the MEAS, REF and GEN cables (310, 320, 300) at both ends and disconnect at the bridge
unit.
N.B.: When loosening support the cable with a 7 mm spanner!
Remove the 3 screws (160) and carefully pull the bridge unit off the reflectometer.
Remove the 2 screws (240) and remove the plate (230).
Fitting the new bridge unit
Secure plate (230) to the new bridge unit using the 2 screws (240).
Carefully place the bridge unit on the reflectometer and secure with 3 screws (160).
Screw the MEAS- REF and GEN cables (310, 320, 300) to the bridge unit, and then tighten at both
ends.
N.B.: When tightening with a 7 mm spanner support the cable.
Reassembling the instrument
Reinstall the Reflectometer (see chapter Replacing Reflectometer RM8 A510 to A540)
Connect the mains cable and turn on at the mains switch. The instrument is now in standby mode
Select Service Level 2 (see Service Functions).
When the instrument has been started, check the protocol file for errors:
[ INFO : Error Log ]
Record generator and receiver correction data (see Recording Correction Data).
Perform factory system error calibration (see Factory System Error Calibration).
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