CMU RF Non Signalling Measurements
1100.4903.12 2.9 E-9
Additional Information... Alternative Settings
and Measurements
... on Step 1
" Menu Select menu
The Menu Select menu shows all function groups installed on
your CMU. If a function group is selected the available test
modes and measurement menus are indicated. Function
groups representing digital network tests (such as
GSM400/850/900/1800/1900-MS) are generally subdivided in
the two test modes Non Signalling and Signalling, each con-
taining a number of measurement menus.
The RF function group is available on any CMU regardless of
the software options purchased. It comprises the three
measurement menus Analyzer/Generator, Power and Spec-
trum. All three measurement menus are directly accessible
from the Menu Select menu.
& Chapter 4
For digital network tests refer to
the relevant operating manuals.
e.g.
GSM400/850/900/1800/1900-MS.
... on Step 2
# Analyzer/Generator menu
The Analyzer/Generator menu contains several softkeys to
• Control the RF signals received and analyzed (Analyzer
Level, Analyzer Settings)
• Control the RF signals generated (Generator)
Defining a level and frequency via the Generator softkey and
the associated hotkeys implies that a continuous signal (CW)
with this level and frequency is generated.
The RF Max. Level defined via Analyzer Level, however, de-
notes the maximum input power which can be measured.
This is identical with the upper edge of the Power diagram
(see below). The permissible range of Max. Level depends
on the input connector and external attenuation used (see
section Analyzer Settings in Chapter 4).
Defining a (center) Analyzer Settings – Frequency implies
that only signals around this frequency are analyzed.
The Analyzer Settings – RBW hotkey defines the resolution
bandwidth of the analyzer.
&
Chapter 4
The Generator softkey provides
the most important settings of the
Generator tab of the Connection
Control menu.
The Analyzer Level and Analyzer
Settings softkeys correspond to
the Analyzer tab of the Connec-
tion Control menu.
$ The status of the Analyzer Power measurement is shown in
the corresponding softkey. For ongoing measurements, the
result in the Power output field is constantly updated.
At present no input signal is available so that the Power out-
put field shows an invalid result “– – –“
Once the softkey is selected, the Analyzer Power measure-
ment can be switched off and on by means of the ON/OFF
key. In contrast, the CONT/HALT toggle key halts the meas-
urement after the next valid result has been obtained.
&
Ch. 4 and Ch. 5
The options for the measurement
status are ON, OFF, or HLT. The
HLT state is reached after the
end of a single shot measurement
(see the section about measure-
ment control in Chapter 5).
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