Calibration—434
Preliminary Procedure for Complete Calibration
NOTE
This instrum ent should be adjusted at an ambient
temperature o f +25°C (±5°C) for best overall
accuracy.
NOTE
Titles fo r externaI controls o f this instrum ent are
capitalized in this procedure (e.g., IN TE N SIT Y ).
Internal adjustments are initia l capitalized only te.g..
Sweep Cal).
1. Remove the wrap-around cabinet from the 434 in the
manner given in section 4 of this manual.
2. Connect the autotransformer to a suitable power
source.
NOTE
If a line voltage source o f exactly 120 VAC RMS is
available, it w ill not be necessary to use the
au to transformer.
3. Connect the 434 to the autotransformer output.
4. Set the autotransformer output voltage for exactly
120 VAC RMS.
5. Set the controls as given under Preliminary Control
Settings. A llow at least 30 minutes warmup before
proceeding.
Preliminary Control Settings
Preset the instrument controls to the settings given below
when starting a Calibration procedure.
POWER/IIMTENSITY
POSITION (vertical and
horizontal)
5 MHz BW
INVERT
Input Coupling
Vertical Mode
VO LTS /D IV
Variable V OLTS/D IV
TRIGGER SOURCE
TRIGGER COUPLING
TRIGGER LEVEL
TRIGGER SLOPE
Sweep MODE
TIM E /D IV
VAR T IM E /D IV
ENHANCE LEVEL
STORE (upper & lower)
ENHANCE (upper & lower)
Pulled out and rotated
fu lly counterclockwise
Midrange
Pushed in
Pushed in
AC
CH 1
.1 V
CAL
COMP
AC
Midrange
+
SINGLE SWEEP
1 ms
CAL
Fully counterclockwise
Non-store
O ff
NOTES
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