User's Manual

Table Of Contents
DIB-500 R4.1 Configuration
Adjusting a cavity coupler – optional (cavity variant only)
146 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
Take note of the status
A carrier is enabled when the output for the corresponding carrier shows none . If the
carrier has not been enabled, you have to repeat the command..
You have successfully set the output power.
6.2.3 Measuring and checking the carriers (impedance adjustment)
For all the variants of the DIB-500 R4.1 the same procedure is used for measuring and
checking carriers (impedance adjustment). Depending on the variant, the hand wheel of
the cavity combiner is secured with a mounting screw.
Overheating of the Tx insulator
The Tx insulator of the respective cavity coupler can overheat during the impedance
adjustment.
Close the impedance adjustment within 10 minutes.
As an alternative, you can interrupt the process and wait until the Tx insulator has
cooled off.
Additional work steps (depending on the variant)
Depending on the variant, the mounting screw of the hand wheel may have to be loos-
ened/tightened using a screwdriver/spanner before/after adjusting the cavity combiner.
Measuring instrument used
The procedure for impedance adjustment described below applies exclusively to the
use of the recommended R&S NRT VSWR measuring equipment (incl. NRT-Z44 meas-
uring equipment). If impedance adjustment was performed with a different measuring
instrument, always proceed in keeping with the product documentation of the measur-
ing instrument used.
Measuring and checking carriers (impedance adjustment)
Preparation:
The tools and aids must be available, refer to section 6.2.1 on page 144.