Agilent Technologies 8922M, S GSM manual Shift , Cell Config MS Info

Making Measurements

ACTIVE CELL

Press the following keys to do this:

• SHIFT , CELL CONFIG (MS INFO)

•Move the cursor to the Paging IMSI field and enter the IMSI using the numeric data entry keypad.

•CELL CNTL , ORG CALL

Performing a “location update” from the MS INFO screen allows the Agilent 8922M/S to update the IMSI. This can be done by either:

•changing theCurrent location parameters and waiting for the mobile phone to re-camp.

•settingIMSI Attach/Detach to On before powering on the phone. When the phone camps its IMSI is set on the MS INFO screen and a call can be made from the Agilent 8922M/S.

Changing Channel, Timeslot, and the Transmit Level

You can alter the parameters of the call before the call has been set up, or during a call. They are displayed on the right-hand side of the screen under MOBILE PHONE, (4), see Figure 2-2 on page 2-6. The parameters are:

•Channel

•Transmit Level (TX Level)

•Timeslot

Channel To change channel, highlight the field and enter a new channel number from the keypad. There is no interruption of communication between the Agilent 8922M/S and the mobile phone. For additional information on valid Absolute RF Channel Numbers (ARFCNs), consult the specifications in Chapter 3.

TX Level This is a coded number used by the Agilent 8922M/S to command the mobile phone to transmit at a particular power. When the TX Level is changed, two things happen:

•The mobile phone should change its transmitted power.

•The Amplitude field in the Expected Input area of the screen, (5),

see Figure 2-2 on page 2-6, automatically adjusts to the nominal value defined by the TX Level field. This allows the RF analyzer in the Agilent 8922M/S to align itself with the mobile phone’s expected output amplitude. If the signal is not within 3 dB of the expected amplitude, it is necessary to modify the Amplitude field so that it is within 3 dB. Directly entering a value in the Amplitude field does not change the transmitted level code transmitted to the mobile phone.

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