Manualshelf

Instructions

ManualsBrandsAim TTi ManualsLaboratory EquipmentAim TTi PSA3605USCSpectrum Analyser, Frequency Fange ,
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4.4.3 Vertical Scaling
enables the vertical amplitude scaling to be changed. Creates a set of bottom-row
function keys as follows:
creates a pop-up menu enabling the vertical scaling to be set to 10dB/div (the
default) through to 1dB/div.
For scales below 10dB/div only a portion of the sweep amplitude will be
visible and the Shift Up/Shift down keys can be used to pan the trace
through the amplitude range of the graticule. These keys auto-repeat.
4.4.4 Amplitude Offset and Compensation Tables (when fitted)
enables the amplitude scaling to be offset to match external attenuation or gain, or
to add frequency dependent amplitude compensation tables to match transducers or
antennae. These functions are only available when the upgrade option U02 is fitted
- see section 6. Creates a set of bottom-row function keys as follows:
cancels any offset or compensations that have been set and returns the amplitude
scaling to normal.
opens a control menu that enables compensation for a 75 Ohm source impedance,
a fixed attenuation or gain, or a frequency dependent compensation table to be
used. The functions can be used individually or together.
The three keys on the upper line select which function
is to be controlled.
For 75 Ohm source, the options are On or Off.
When set to On in firmware, V1.xx and V2.xx all
readout values are adjusted by +1.9dB to calibrate
back to a 50 Ohm system.
In firmware, V3.00 dBuV readout is adjusted by
+1.9dB and readout is unchanged to indicate values in a 75 Ohm system.
For Fixed Offset, the Set Offset key creates a dialogue box by which an offset can be set
between
-50.0dB and +50.0dB. The set figure is added to the displayed reference level and to the
graticule values and marker readout.
For Compensation Table, the Select Table key opens a file list of stored compensation tables
that can be loaded. See section 7.9.2 for a full explanation.
Whenever offsets or compensations are active, a warning message is displayed at the top right
of the graticule. See section 7.9.1 for safety warnings on the use of these function.