Maintenance, storage and disposal
R&S
®
SMA100B
764User Manual 1178.3834.02 ─ 09
17.3.1.2 How to use the internal adjustments
Deciding whether to run internal adjustments
1. Select "System Config > Setup > Internal Adjustment".
2. Observe the status and color indication in the section "Since Last Full Adjustment".
Green: internal adjustments are not required.
Red: internal adjustments are required. Observe also the indication in the "Informa-
tion" field.
3. We recommend that you run internal adjustments in the following cases:
● Before starting any application, that requires a maximum of level accuracy
● When a long period of time has passed since the last adjustments
● If the ambient temperature of the instrument significantly differs from the one of
the last adjustments
4. Proceed as described in "Running internal adjustments" on page 764.
Running internal adjustments
1.
NOTICE! Adjustments can be invalid if performed when the instrument is not
warmed-up.
Wait until the instrument has reached its operating temperature before you start the
adjustment procedure.
The warm-up time is up to 30 minutes.
2.
NOTICE! High power at the RF output applied during internal adjustment can
destroy a connected DUT (device under test).
Disconnect the DUT.
3. Replace the DUT by a terminating resistor with adequate power rating.
The required power of the resistor varies depending on whether the instrument is
equipped with a high-power option, see "Minimum power rating required for internal
adjustments" on page 762.
4. Select "System Config > Setup > Internal Adjustment > Adjust All".
If a terminating resistor is required, a warning message prompts you to make sure
that you have terminated the RF output.
Performing maintenance tasks
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