Hameg Instruments HM5530 Manual Del Usuario página 33

If this fi lter is switched in, the permissible sweep speed
will be decreased; if too large a span was selected, the
amplitudes displayed will be too low; in such a case the
message „uncal" will be shown in place of the sweep time
readout (SW ... ms).
STOP
The span must then be reduced, until the „uncal" display
vanishes. In order to still see the signal, prior to reducing
the span, the signal should be moved to the screen center
with the CENTER adjustment. If this is not followed,
the signal may fall outside the measurement range, i.e.
outside the screen area.
SELECT
SAVE / RECALL (push long)
These pushbuttons are used to store and recall up to 10 instrument
settings; only those settings/parameters are stored upon turn-off which
are shown in the 8 readout fi elds. After turn-on, only these 8 parameter
settings will be reinstalled and displayed; only the pushbuttons CENTER
and WRITE A will light up, irrespective of the kind and number of
pushbuttons which were lit before turn-off or a save operation.
In order to save a setting, fi rst the pushbutton SAVE must be depressed
shortly, it will light up, the sweep time readout (SW ... ms) in the right
readout fi eld will be replaced by the message „SAVE 0" (or another
number from 1 to 9). Now there are 2 s allowed for increasing the
number by more short depressions of SAVE or reducing it by short
depressions of RECALL; after each depression the timer is reset, thus
allowing further time. If the desired number of the memory is displayed,
another but this time long depression of SAVE will store the setting
which is announced by a beep, the pushbutton extinguishes, the sweep
time readout will return.
In order to recall a setting, fi rst the pushbutton RECALL is shortly de-
pressed, it will light up, „RECALL 0" (or another number from 1 to 9) will
be displayed in the sweep time readout fi eld. Again, there are 2 s of time
allowed to increase the number with SAVE or decrease it with RECALL;
after each depression, the timer is reset and further time allowed. If the
desired number is displayed, a long depression of RECALL will install
the setting which is announced by a beep, the pushbutton extinguishes,
the sweep time readout returns.
C o n t r o l s a n d r e a d o u t
If there is no further depression of either SAVE or RECALL after the
initial depression, the function will be left automatically after 2 s, the
pushbutton(s) will extinguish, the sweep time display will return.
In contrast to the HM5014-2, SAVE and RECALL also function if AVG or
MAX HOLD are activated, but both will be disabled by storing a setting
or turning the instrument off.
MARKER / Δ-MARKER (push long)
Frequency/level and delta frequency/delta level markers. A short de-
pression of MARKER calls the fi rst marker (symbol: cross), the readout
will show the frequency (MF ... MHz) in place of the center frequency
(CF) and the level (ML ... dBm) in place of the span frequency (SF).
The marker will appear at that frequency where it was last positioned
before it was switched out. By a second short depression of MARKER,
the marker will automatically position on the peak of the displayed
spectrum. The marker can be set via a keyboard input or moved with
the tuning knob.
A long depression of MARKER will call the second (delta) marker
(symbol: rhombus). The readout will display the difference frequency
(DF ... MHz) and the difference level (DL ... dBm) to the fi rst marker
with the appropriate sign in place of the (CF) and (SF) readouts. By a
second long depression the deltamarker will automatically position on
the peak of the displayed spectrum. The difference frequency can be
changed with the tuning knob.
If both markers are activated, the tuning knob may be associated with
the fi rst marker by a short depression and with the deltamarker with a
long depression of MARKER, the latter will be indicated by a beep. The
marker function can only be left by depressing another function key.
RBW (Resolution bandwidth)
AUTO (push long)
By short depressions of this pushbutton the bandwidth of the last if stage
can be selected: 1 MHz, 120 kHz, or 9 kHz, the actual value is shown in
the left readout fi eld (RB ... ).
A long depression will switch to automatic selection of the optimum
bandwidth, this will be indicated in the readout by (RB* ... ). The auto-
matic mode is left by another long depression.
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Subject to change without notice