HP (Hewlett-Packard) E6380-90019 Cell Phone Accessories User Manual


 
166 Chapter 6
Configuration - Screens and Control Fields
Duplex Out Ext Ref In
Duplex Out
This field is used to indicate losses or gains between the DUPLEX OUT
port and the device-under-test.
Enter a positive value to indicate a gain (such as an amplifier gain).
The RF generator’s level is automatically set that amount below
what is indicated in the RF generator’s Amplitude field. (Example;
if this value is 10 dB, and the Amplitude field shows 0 dBm, the
actual level out this port is 10 dBm.) The value at the output of the
external amplifier should then be at the level indicated in the
Amplitude field.
Enter a negative value to indicate a loss (such as cable loss). The RF
generator’s level is automatically set that amount above what is
indicated in the RF generator’s Amplitude field to compensate. The
value at the opposite end of the cable (loss) should then be at the
level indicated in the Amplitude field; unless the resulting RF
generator setting exceeds the maximum output level, then an error
occurs: Input value out of range. In that case, reduce the
Amplitude setting, or decrease the Duplex Out value.
This field is only used when the RF Level Offset field is set to On.
Screen(s) Where Field is Present
INSTRUMENT CONFIGURE
Ext Ref In
This field selects the reference frequency of the signal at the EXT REF
IN connector. You can select 1, 2, 5, or 10 MHz; 1x, 2x, 4x, 8x, or 16x
chip.
Operating Considerations
This signal is used as a reference for, and directly affects, these
functions:
RF Generator Frequency (including the Tracking Generator)
RF Frequency Counter
AF Frequency Counter
RF Analyzer Tune Frequency
Spectrum Analyzer Center Frequency
AF generators 1 and 2 are not affected by the external reference; they
use their own reference.
See "EXT REF IN" on page 189 for more information.
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