User`s guide

32 E6651A User’s Guide
3 Base Station Emulator Mode
Interfacing With the Subscriber Station
To begin interfacing with the Subscriber Station (SS) in BSE
mode:
1 Connect the E6651A and the SS: After applying AC
power to the E6651A and initializing the program,
connect the SS to the unit using an RF cable or antenna.
2 Select BSE mode: In the initial Measurement Window,
select the Tes t BS menu item.
3 Adjust Output Power: The default output power of the
E6651A is set to the minimum level (- 124 dBm) to
protect the subscriber station from damage.
It is necessary to adjust the output power to an
appropriate level for the test subscriber station's
specifications and the method of connection between the
SS and the unit. To adjust the output power, press
Amplitude on the Front Panel and enter the desired level
using the Knob or Numeric Keys. When using the Numeric
Keys, press ENT to confirm the input. When an antenna is
used to connect the SS to the Test Set, the recommended
output level is about 0 dBm. When a cable connection is
used, the recommended range is between - 50 and - 40
dBm. Please contact the SS vendor for more detailed
guidelines on a specific device.
4 Adjust Input Attenuation Value: The Test Set can
attenuate the input signal to protect it’s internal circuitry.
It is necessary to adjust the input attenuation value to an
appropriate level for the SS specifications and connection
method. Please refer to Table 2 for recommended input
attenuation value settings.
Table 2 Recommended Attenuation Range
Reference Level (dBm) -30 -20 -10 0 10 20 30
Attenuation Setting (dB)
0 102030405060
5 152535455565
10 20 30 40 50 60 70
15 25 35 45 55 65 75
20 30 40 50 60 70 80
25 35 45 55 65 75 85
30 40 50 60 70 80