Instrument Tour
R&S
®
FSW
57Getting Started 1338.4102.02 ─ 08
Connector Reference signal Usage
REF INPUT 1...50 MHz
0...10 dBm
To provide an external reference signal on the
R&S FSW.
REF OUTPUT 1...50 MHz
0...10 dBm
To provide the same external reference signal
received by the REF INPUT 1...50 MHz connector to
another device, when available.
REF OUTPUT 10 MHz
10 dBm
To provide the internal reference signal from the
R&S FSW to another device continuously.
Also used to provide OCXO reference signal to
another device.
REF INPUT 100 MHz / 1 GHz
0...10 dBm
To provide an external reference signal on the
R&S FSW.
REF OUTPUT 100 MHz
6 dBm
To provide a 100 MHz reference signal from the
R&S FSW to another device.
REF OUTPUT 640 MHz
16 dBm
To provide a 640 MHz reference signal from the
R&S FSW to another device.
SYNC TRIGGER
The SYNC TRIGGER connector can also be used to synchronize the refer-
ence frequency on several devices (see Chapter 5.2.10, "SYNC TRIGGER
OUTPUT/INPUT", on page 53).
5.2.18 OCXO Option (R&S FSW-B4)
This option generates a 10 MHz reference signal with a very precise frequency. If
installed, and if no external signal is used, this signal is used as an internal refer-
ence. It can also be used to synchronize other connected devices via the REF
OUTPUT 10 MHz connector.
Warm-up time for OCXO
When the instrument is switched on, the OCXO requires an extended warm-
up time (see data sheet).
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