R&S SMB100A - Page 481

Remote Control Commands
R&S
®
SMB100A
466Operating Manual 1407.0806.32 ─ 21
Example:
STEReo:DIRect "IMP=1"
The external impedance is set to 600 Ohm
Example:
STEReo:DIRect? "IMP"
Response: "1"
STEReo:DIRect
"MASK=<NumbGroups>,<ErrFreeGroups>,<BitMaskBlcA>,<BitMaskBlcB>,<Bit
MaskBlcC>,<BitMaskBlcD>"
STEReo:DIRect? "MASK"
Sets a bit mask to generate defined bit errors in the RDS data stream.
Setting parameters:
<NumbGroups> Number of groups to be masked.
If <NumbGroups> is set to zero, the RDS groups are continu-
ously linked to the error mask.
If <NumbGroups> is set to a value other than zero, this value is
decremented after each errored group transmitted. When zero
count is reached, no further errored groups are transmitted, and
MASK_STATE is set to "0".
Range: 00 to FF (hexadecimal values)
<ErrFreeGroups> Number of error-free groups to be inserted after each errored
group.
Range: 00 to FF (hexadecimal values)
<BitMaskBlc> <BitMaskBlcA>,<BitMaskBlcB>,<BitMaskBlcC>,<BitMaskBlcD>
Hexadecimal bit mask for blocks A, B, C and D of the RDS
groups. For each block, 26 bits (16 data bits and 10 CRC bits)
have to be entered in hexadecimal code.
Range: 0000000 to 3FFFFFFF
Example:
STEReo:DIRect
"MASK=09,01,0000001,0000000,0000000,0000000"
In nine RDS groups, the least significant bit of the CRC code of
block A is inverted, i.e. an errored bit is sent. After each errored
group, one error-free group is inserted. After transmission of the
complete sequence, MASK_STATE is set to "0".
With the command MASK_STATE=1, the above sequence (9
errored groups with one error-free group inserted after each
errored group) is retransmitted once.
Then, MASK_STATE is again set to "0".
Example:
STEReo:DIRect? "MASK"
Response: "09,01,0000001,0000000,0000000,0000000"
STEReo:DIRect "MASK_STATE=<State>"
STEReo:DIRect? "MASK_STATE"
Switches on or off the transmission of defined bit errors in the RDS data stream.
Direct Commands for the Stereo/RDS Coder Option R&S SMB-B5