Rohde & Schwarz EX-IQ-BOX, User Manual

Page: 294 / 418

Remote Control Commands
R&S
®
EX-IQ-BOX
279 User Manual 1409.5570.32 ─ 05
Manual operation: See "Rx Test" on page 123
[:SOURce<hw>]:EBOX:USER:TEST:RX:WORDs?
Queries the total number of received bits. This functions consecutively counts the number
of received bits, compares them with the sent data and determines the error rate.
Return values:
<Words> float
Example: SOUR1:EBOX:USER:DIR REC
sets to "Receiver" mode.
SOUR1:EBOX:USER:TEST:RX:STAT ON
activates Rx test.
SOUR1:EBOX:USER:TEST:RX:WORD?
checks the number of received bits.
Usage: Query only
Manual operation: See " Rx Received Bits" on page 124
[:SOURce<hw>]:EBOX:USER:TEST:TX:SIGNal <Signal>
Selects a test signal of the test generator.
The R&S EX-IQ-BOX internally generates either a sine, PRBS or counter signal for test-
ing, defined as follows:
●
PRBS
The PRBS 16 sequence is defined by the generator polynomial G(x) = 1 + x
2
+ x
3
+
x
5
+ x
16
.
The functional implementation of the PRBS generation defined by the following linear
feedback shift register (LFSR) :
Fig. 9-2: User defined > Test PRBS linear feadback shift register (LFSR)
●
Sine
The sine signal follows the formula,
Fig. 9-3: User defined > sine signal formula
n = discrete time index
f = frequency of the test sine signal
f
s
= sampling frequency, based on the "protocol", "data" and "clock" settings.
with the real component :
User Defined - Remote Control Commands