R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
REFERENCE
FREQUENCY
REF BW (NORM
WIDE)
NOISE SRC
(ON OFF)
SIGNAL
SOURCE
Basic Settings
Once the R&S FSQ has switched to the internal reference signal it stays with the
internal reference. You have to switch back to the external reference signal manually
(press REFERENCE EXTERNAL and then activate REFERENCE EXT (INT) again).
The current source (internal or external) is indicated in the lower part of the softkey.
Remote command: ROSC:SOUR EAUT
The REFERENCE FREQUENCY softkey sets the frequency of the external reference.
The range is from 1 MHz to 20 MHz with the default value being 10 MHz.
The reference frequency does not change after a preset to maintain the setup of a
test system.
Remote command: ROSC:EXT:FREQ 10 MHZ
The REF BW (NORM WIDE) softkey controls the PLL bandwidth used to sznchronize
with the external reference signal. Possible settings are NORM (PLL bandwidth
about 3 Hz) or WIDE (PLL bandwidth about 30 Hz). The default setting is NORM.
The reference settings do not change after a preset to maintain the setup of a test
system.
The softkey is available only if the external reference frequency is 10 MHz.
This function requires a synthersizer board revision with hardware code 7 or above .
You can check this information in the “HWC” column of the hardware info window
(see “HARDWARE INFO” on page 4.198).
Remote command: ROSC:EXT:PLL NORM | WIDE
4.6.3.2 External Noise Source
The NOISE SRC (ON OFF) softkey switches on or off the supply voltage for an
external noise source which is connected to the NOISE SOURCE connector on the
rear panel of the instrument.
Remote command: DIAG:SERV:NSO ON
4.6.3.3 Signal Source
The SIGNAL SOURCE softkey opens the submenu for switching on or off the YIG
FILTER, the IQ DITHER and RF PATH.
YIG FILTER (ON OFF)
IQ DITHER ON OFF
RF PATH
BASEBAND ANALOG �
BASEBAND DIGITAL � DIGITAL IN FULL SCALE
DIGITAL IN SAMPLE RATE
FULL SCALE AUTO SET /
SAMPLE RATE AUTO SET
DIGITAL BB INFO
EX-IQ BOX
4.174 Operating Manual 1313.9681.12 - 01