Hameg Instruments HM5510 Manuel page 38

C o n t r o l s a n d c o n n e c t i o n
SPAN - The span ist the frequency range displayed on
screen, 1 to 1000 MHz.
In order to change the span the pushbuttons up or down
must be used. The span will be increased from zero in
steps of 1 – 2 – 5 up to full span 1 GHz.
Except for zero span the frequency range on the screen is
determined by the span and the center frequency selected.
Example:
Center frequency 300 MHz, span 500 MHz:
The sweep starts at 50 MHz at the lefthand side of the
screen and moves up to 550 MHz on the righthand side. (50
MHz = 300 MHz – ½ span and 550 MHz = 300 MHz + ½ span.)
Please note:
If the span is too large with respect to the RBW (and VBW)
false amplitude levels result, indicated by UNCAL in the
display. At 500 MHz and 1 GHz span this will always be the
case. If UNCAL is shown move the signal fi rst to the center
and then reduce the span until the UNCAL disappears.
ZERO SPAN: press the lower pushbutton until the display
shows ZERO-SP.
In zero span mode the analyzer acts like a selective volt-
meter which measures the frequency selected by CENTER
FREQ.
In order to exit zero span press one of the span pushbuttons
shortly, the instrument will return to the span selected
before entering zero span.
FULL SPAN: press the upper pushbutton until the display
shows S1GHz .
In order to exit this setting press one of the two pushbut-
tons shortly, the instrument will return to the former span
setting.
OUTPUT 50Ω – N connector, Test signal output
If this output is activated a 10 MHz signal of 0 ±3 dBm is
available here. This may be connected to the analyzer input
and displayed.
TESTSIGNAL – SIGNAL. The pushbutton turns the test
signal on or off.
PROBE POWER – 6 V /100 mA for Hameg fi eld probes
DC
HZ 530. 2.5 mm connector.
38
Subject to change without notice