NARDA SRM-3006 - Basic settings

10 Scope Mode
Narda SRM-3006 127
10.3.2 Example 1: GSM
GSM is characterized by the following properties:
• BCCH and several traffic channels
• Channel bandwidth 200 kHz
• Cycle time: 8 timeslots of 577 μs each = 4.6 ms
This results in the following settings:
10.3.3 Example 2: DECT telephone
DECT is characterized by the following properties:
• Frequency range: 1880 MHz – 1900 MHz
• Base station is permanently active
• Number of channels: 10
• Channel bandwidth: 1728 kHz
• Cycle time: 24 timeslots of 368 µs each = 8 ms
This results in the following settings:
Table 33: Parameter settings for GSM
Parameter Function / Setting
Fcent Center frequency of GSM channel to be observed,
e.g. 931.1879 MHz
Sweep Time 8 timeslots x 577 μs = 4.6 ms
Time Resolution 4.6 ms / 600 = 7.7 μs –> selected: 5 μs
RBW 200 kHz
Axis Individual axis
Table 34: Parameter settings for DECT
Parameter Function / Setting
Fcent e.g. Channel 10: 1897.344 MHz
Sweep Time 24 timeslots x 368 μs = 8ms
Time Resolution 1/RBW = 1/2 MHz = 500 ns
RBW 1728 kHz –> selected: 2MHz
Axis Individual axis