Instrument Function
R&S
®
SMBV100A
378
Operating Manual 1176.8016.02 ─ 17
Clock Source
Selects the clock source (also see section "Clock Signals", page 2).
"Internal"
The internal clock reference is used.
"External"
The external clock reference is fed in as the symbol clock via the REF
IN connector.
While working in master-slave synchroniuos mode, an external clock
source has to be selected for the slave-instrument(s) and the CLOCK
IN connector has to be connecter to the CLOCK OUT connector of
the master instrument.
This allows the slave instrument(s) to synchronise its clock to the sys-
tem clock of the master instrument.
The chip rate must be correctly set to an accuracy of (
±
2% (see data
sheet).
The polarity of the clock input can be changed with the aid of "Global
Trigger/Clock/External Input "Settings.
Remote command:
[:SOURce<hw>]:BB:DM:CLOCk:SOURce
Clock Mode
Enters the type of externally supplied clock.
"Symbol"
A symbol clock is supplied via the CLOCK connector.
"Multiple Sym-
bol"
A multiple of the symbol clock is supplied via the CLOCK connector,
the symbol clock is derived internally from this.
The "Multiplier" window provided allows the multiplication factor to be
entered.
Remote command:
[:SOURce<hw>]:BB:DM:CLOCk:MODE
Symbol Clock Multiplier
Enters the multiplication factor for clock type "Multiple".
Remote command:
[:SOURce<hw>]:BB:DM:CLOCk:MULTiplier
Measured External Clock
Displays the measured frequency of the external clock signal. This enables the user to
permanently monitor the frequency of the externally introduced clock.
This information is displayed only if the external clock source has been selected.
Remote command:
Synchronisation State
For instruments working in slave synchronization mode, this parameter displays the
status of the external clock source, i.e. whether the external clock source of the slave
instrument is synchronized or not synchronized yet.
Remote command:
n.a.
Baseband Signal - Baseband Block
