R&S SMJ100A, Руководство по эксплуатации, Страница: 406 / 874

Instrument Function
R&S
®
SMJ100A
390 Operating Manual 1403.7458.32 ─ 14
"External" The external clock reference is fed in as the symbol clock or multiple
thereof via the CLOCK connector.
The symbol 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 Settings".
Remote command:
[:SOURce<hw>]:BB:ARBitrary:CLOCk:SOURce
on page 583
Clock Mode
Enters the type of externally supplied clock.
"Sample" A sample clock is supplied via the CLOCK connector.
"Multiple Sam-
ple" A multiple of the sample clock is supplied via the CLOCK connector;
the sample clock is derived internally from this.
The "Multiplier" window provided allows the multiplication factor to be
entered.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:CLOCk:MODE
on page 582
Sample Clock Multiplier
Enters the multiplication factor for clock type "Multiple".
Remote command:
[:SOURce<hw>]:BB:ARBitrary:CLOCk:MULTiplier
on page 582
Measured External Clock
Provided for permanent monitoring of the enabled and externally supplied clock signal.
Remote command:
CLOCk:INPut:FREQuency?
Global Settings
The buttons in this section lead to submenu for general trigger, clock and mapping set-
tings.
Global Trigger/Clock Settings
Calls the "Global Trigger/Clock/Input Settings" dialog.
This dialog is used among other things for setting the trigger threshold, the input impe-
dance and the polarity of the clock and trigger inputs.
The parameters in this menu affect all digital modulations and standards, and are
described in
Chapter 5.2.3.10, "Global Trigger/Clock/External Input Settings" ,
on page 141.
User Marker / AUX I/O Settings
Calls the "User Marker AUX I/O Settings" menu, used used to map the connector on
the rear of the instruments.
See also Chapter 5.2.3.12, "User Marker / AUX I/O Settings" , on page 144.
Baseband Signal - Baseband Block