Rohde & Schwarz SMU200A - Page 645

Remote Control Commands
R&S
®
SMU200A
625Operating Manual 1007.9845.32 ─ 15
[:SOURce<hw>]:BB:DM:CLOCk:MODE <Mode>
The command enters the type of externally supplied clock (:BB:DM:CLOCk:SOURce
EXTernal).
The bit clock and the symbol clock differ only in the case of modulations that have more
than two states, i.e. that require more than one bit for encoding each state. When
MSYMbol is used, a multiple of the symbol clock is supplied via the CLOCK connector
and the symbol clock is derived internally from this. The multiplier is entered with the
command :BB:DM:CLOCk:MULTiplier.
It is not possible to select BIT and MSYMbol in the case of an external serial or external
parallel data source (SOUR:BB:DM:SOUR SER and PAR).
For two-path instruments, the only numerical suffix allowed for SOURce is 1, since the
external clock source is permanently allocated to path A.
Parameters:
SYMBol|MSYMbol | BIT
SYMBol
<Mode>
*RST:
BB:DM:CLOC:MODE SYMB
selects clock type Symbols, i.e. the supplied clock is a symbol
clock.
Example:
[:SOURce<hw>]:BB:DM:CLOCk:MULTiplier <Multiplier>
The command specifies the multiplier for clock type Multiple Symbols
(BB:DM:CLOCk:MODE MSYM) in the case of an external clock source.
For two-path instruments, the only numerical suffix allowed for SOURce is 1, since the
external clock source is permanently allocated to path A.
Parameters:
float
1 to 64
1
4
<Multiplier>
Range:
Increment:
*RST:
BB:DM:CLOC:SOUR EXT
selects the external clock source. The clock is supplied via the
CLOCK connector.
BB:DM:CLOC:MODE MSYM
selects clock type Multiple Symbols, i.e. the supplied clock has a
rate which is a multiple of the symbol rate.
BB:DM:CLOC:MULT 12
the multiplier for the external clock rate is 12.
Example:
SOURce Subsystem