Rohde & Schwarz FSVA - Page 173

Instrument Functions
R&S
®
FSVA/FSV
173Operating Manual 1176.7510.02 ─ 09
Option Licenses.......................................................................................................... 192
└ Install Option.................................................................................................192
└ Install Option by XML....................................................................................192
Application Setup Recovery........................................................................................192
Service........................................................................................................................ 192
└ Input Source..................................................................................................193
└ RF.......................................................................................................193
└ Calibration Frequency RF...................................................................193
└ Calibration Frequency MW................................................................. 193
└ Calibration Frequency WB..................................................................193
└ Calibration Frequency WB2................................................................194
└ Reset Password............................................................................................194
└ Selftest..........................................................................................................194
└ Selftest Results.............................................................................................194
└ Password...................................................................................................... 194
└ Service Function........................................................................................... 194
Reference Int/Ext
Switches between the internal and external reference signal source. The default setting
is internal reference. It is important that the external reference signal is deactivated
when switching from external to internal reference to avoid interactions. When an
external reference is used, "EXT REF" is displayed in the status bar.
If the reference signal is missing after switching to an external reference, the message
"NO REF" is displayed to indicate that no synchronization is performed.
The R&S FSVA/FSV can use the internal reference source or an external reference
source as frequency standard from which all internal oscillators are derived. A 10 MHz
crystal oscillator is used as internal reference source. In the external reference setting,
all internal oscillators of the R&S FSVA/FSV are synchronized to the external reference
frequency, which can be set from 1–20 MHz in 100 kHz steps. For details on connec-
tors refer to the Quick Start Guide, chapter 1 "Front and Rear Panel".
Note: Optional internal reference sources.
Alternatively to the standard internal reference source, an optional OCXO reference
(option R&S FSV-B4), or an ultra high precision reference (option R&S FSV-B14) are
available. These options generate a very precise 10 MHz reference signal with an out-
put level of ≥ 0 dBm, which can also be used to synchronize other connected devices
via the REF OUT connector.
If installed, and if no external signal is used, the OCXO signal is used as an internal
reference. If an ultra high precision reference is installed, this reference signal is auto-
matically used as the internal reference.
Remote command:
[SENSe:]ROSCillator:SOURce on page 955
SOURce:EXTernal<1|2>:ROSCillator: EXTernal:FREQuency on page 954
Handle missing Ext. Ref
If an external reference is selected but none is available, there are different ways the
instrument can react. This command opens a submenu to select the preferred method
of handling a missing external reference. By default, an error flag is displayed in the
status bar of the display.
General Settings, Printout and Instrument Settings