Agilent Technologies E6701A Guide de l'utilisateur télécharger pdf (Page 38)

Agilent PXT Wireless Communications Test Set

User’s Guide

Figure 2 – 1: Offsets Applicable to Band 4 Frequencies

The table above is an example of how you would set the offsets applicable to Band 4 frequencies. It

displays the points for the upper/lower boundaries of the uplink, and likewise for the downlink. This

simplistic model provides a constant offset of -32dB on the received uplink path (32 dB of path loss), and -7

dB for the downlink. The result of the PXT’s downlink power is boosted by 7 dB (whether you are using RF1

or RF2 as the output port), and the received uplink signal has 32 dB of compensation applied to its

measurement result.

You would want to add more frequency points to fully describe the losses across the uplink and downlink

paths.

These offset values are also used by the Adaptive Attenuation feature on page 13

to determine the correct amount of attenuation required for the Idle and

Connected Adjuster values.

For more information regarding how offsets are determined between specified frequencies, see Amplitude

Offsets Between Frequency Settings and Amplitude Offsets, Channel Bandwidths, and Center frequency.

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Agilent Technologies E6701A Guide de l'utilisateur Page 38