Stereo Modulation (Option R&S SML-B5) R&S®SML / R&S®SMV03
1090.3123.12 E-6 4.30
IMP
Des
cription: Sets external L, R impedances.
Command: IMP=x
Query: IMP?
Response: x
Value range: 1|2
1 = 600
2 = 100 k
Example: Command:
STEReo:DIRect “IMP=1“
The external impedance is set to 600 .
Query:
STEReo:DIRect? “IMP“
Response:
"1"
MASK
Description: Sets a bit mask to generate defined bit errors in the RDS data stream.
Command: MASK=xx,yy,aaaaaaa,bbbbbbb,ccccccc,dddddddd
Query: MASK?
Response: xx,yy,aaaaaaa,bbbbbbb,ccccccc,dddddddd
Value range: xx = 00 to FF (hexadecimal values), corresponding to number of groups to be
masked.
If xx is set to zero, the RDS groups are continuously linked to the error mask.
If xx 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".
yy = 00 to FF (hexadecimal values)
Number of error-free groups to be inserted after each errored group
a, b, c d = 0000000 … 3FFFFFFF,
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.
Example: Command:
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".
Query:
STEReo:DIRect? “MASK“
Response:
"09,01,0000001,0000000,0000000,0000000"
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