Agilent Technologies 8922 P manual Fast BER Screen, Fast BER screen

Figure 4-3

NOTE

Screens

Fast BER Screen

Fast BER Screen

One extra field, labelled Loopback, appears in the Fast Bit Error screen, when the HP/Agilent 8922 is in 2x1 mode.

Fast BER screen

The Loopback field is a toggle field and allows the choice of either master or slave. This instructs the mobile to either loopback the master channel on the downlink to the master uplink or loopback the slave downlink to the master uplink.

Note that toggling the Loopback field does not immediately instruct the mobile to perform a loopback using the contents. Entering the screen sends the command to the mobile to close the loop. It is therefore necessary to enter the screen with this field set to loopback the downlink channel of choice.

When performing Fast BER on the slave channel, it is necessary to start the measurement on the master unit because the master unit controls all the signalling with the mobile). As a result, this also starts a Fast BER measurement on the master unit which should be ignored.

Chapter 4 39