42
Subject to change without notice
seconds) the SAVE and the RECALL pushbuttons can be
used to select the memory location with ciphers between
0 and 9. Each time the memory location setting is changed
by briefl y depressing the SAVE or RECALL pushbutton, the
(approx.) 2 seconds for the memory location display time
starts again.
SET (push long): Saving the instrument setting fi rst requires
that the memory location be displayed, which is called by
briefl y pressing the pushbutton. Pressing and holding the
pushbutton while the memory location is displayed causes
the instrument to save the instrument settings in the selec-
ted memory location. The take over is acknowledged by a
double beep.
Function break off: After approx. 3 seconds waiting time the
SAVE function is left automatically if it has been called inad-
vertently or not used. The „Save..“ memory location display
is then switched off.
A→B
Pushbutton – When the readout displays the letter A at the
right of the center frequency, the actual spectrum present
at the input is displayed. After processing the spectrum is
digitized stored into A memory, converted back to analog and
displayed on the screen.
Pressing the pushbutton A→B stores the contents of me-
mory A into the B memory and additionally switches over to
display the content of memory B. The readout now indicates
the letter B in the position where previously A was shown.
After the actual spectrum has been transfered from memory
A to B the transfered signal is displayed continuously (wit-
hout change) until switching either to memory A
(causing
the actual input spectrum to be displayed) or A–B (where
the actual input spectrum minus the memory B content is
shown). The spectrum in memory B is lost after turning off
the instrument.
SPAN
Pushbuttons. – The pushbuttons allow
you to increase (upper pushbutton) or
reduce (lower pushbutton) the SPAN.
It can be selected in a 1-2-5 sequence
between 1 MHz and 1000 MHz (full span)
and defi nes the start and stop frequency
in combination with the center frequency
setting.
Example: In combination with a cen-
ter frequency of 300 MHz and a span of
500 MHz, the start frequency (trace start,
left) is 50 MHz (300 MHz – Span/2) and
the stop frequency (trace end, right) is
550 MHz (300 MHz + Span/2).
Note: The instrument has been pro-
grammed to optimize the sweep time,
considering the span, resolution band-
width (RBW) and video fi lter (VBW). If not
possible the readout shows „uncal“ to
indicate that the spectrum level values
are incorrect.
ZERO SPAN
Pushbutton – Pressing this pushbutton
switches this mode on or off. In order to
exit ZERO SPAN, by pressing one of the
Controls and readout
SPAN pushbuttons, the instrument will return to the SPAN
selected before entering ZERO SPAN.
In ZERO SPAN mode the readout shows ZERO-SP instead of
the SPAN setting. This mode enables measurement on a dis-
crete frequency that is determined by the center frequency
setting. ZERO SPAN can also be turned off by pressing one
of the SPAN
pushbuttons.
INPUT 50 Ω
N-socket – Measurement input, max. 25 V
DC
resp. max. +10
dBm HF. With the attenuator set to –40 dB the maximum
input HF-signal is +20 dBm. Higher levels may destroy the
input stage.
The N connector is directly connected to the chassis and
thus with the safety earth of the power plug!
PHONE
Headphone output connector, Ø 3.5 mm. – This output is
destined for headphones with an impedance of ≥8 Ω. The
volume can be varied with a screwdriver using the VOL. con-
trol.
The signal at this socket originates from the AM demodu-
lator and eases the identifi cation of signals. E.g. If an antenna
is connected to the spectrum analyzer input in ZERO SPAN
mode, the instrument can be tuned to a discrete transmitter
frequency. Please consider that using this function must be
within the limits of the law.
TEST SIGNAL
BNC socket with pushbutton and associated LED. – Even if
the LED is not lit, the BNC socket serves always as a broad-
band signal source with many spectra even though the
48 MHz signal is absent. It can be connected to the spectrum
analyzer input via a 50 Ω cable and used for function check
of the input.
To Next Page
Loading...
Need help?
General
