Rohde & Schwarz CMU-K20, Operating Manual

Page: 156 / 646

Non Signalling: Connection Control CMU-K20/K21/K22/K23/K24
1115.6088.12 4.78 E-11
Frequency
/ [MHz]
Channel GSM1800
Band
Frequency
/ [MHz]
Channel GSM1900
Band
0.2
↓
1805
---
↓
---
–
0.2
↓
1930
---
↓
---
–
1805.2
↓
1879.8
512
↓
885
GSM 1800 band
1930.2
↓
1989.8
512
↓
810
GSM 1900 band
1880
↓
2700
---
↓
---
–
1990
↓
2700
---
↓
---
–
Frequency
/ [MHz]
Channel GSM850
Band
0.2
↓
869.0
---
↓
---
–
869.2
↓
893.8
128
↓
251
GSM 850 band
893.0
↓
2700
---
↓
---
–
According to the channel width of the three GSM bands, the RF frequency can be
set in multiples of 200 kHz. It can be modified by an additional
frequency offset
entered in the input field below.
Remote control
SOURCe:RFGenerator:FREQuency[:CHANnel] <Number>
Frequency
Offset
The Freq. Offset softkey defines a frequency offset shifting the frequency set under
RF Channel. This enables fine tuning of the RF frequency generated by the CMU,
e.g. in order to simulate a Doppler shift (caused by a relative movement between
mobile and CMU) or detuning of the mobile.
Remote control
SOURce:RFGenerator:FM:DEViation <FrequencyOffset>
Training
Sequence
The Training Sequence softkey defines the training sequence that is superimposed
on the RF carrier signal. The following settings are possible:
GSM 0 to 7 GSM standard training sequences
Dummy GSM-specific dummy burst
The 8 GSM standard training sequences are listed above (see page 4.72 ).
Remote control
CONFigure:RFGenerator:MODulation:TSEQuence:SELection
GSM0 | ... | GSM7 | DUMMy
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