Anritsu 3GPP, Руководство по измерениям

Страница: 26 / 244

2-10 Amplitude Menu GSM/GPRS/EDGE Signal Analyzer
2-12 PN: 10580-00234 Rev. Y 3GPP MG
2-10 Amplitude Menu
Key Sequence:
Amplitude
2-11 Setup Menu
Key Sequence:
Setup
Power Offset: Enter the power offset to automatically adjust for the loss or
gain through any external cables, attenuators and couplers. The power can
be offset from 0 dB to 100 dB in either direction. Press the Power Offset key,
then enter a value using the arrow keys, rotary knob, or numeric keypad.
Note: When using the keypad, the submenu keys will change to Units keys
(dB) of External Loss and External Gain, as illustrated on the left, below the
Amplitude menu. Enter a value, then press the appropriate Units key to
make your selection. A negative offset value in external gain equates to the
same amount of external loss. For example, entering –1.0 dB in Ext Gain is
the same as 1.0 db of Ext Loss.
By default, the instrument will automatically change attenuation, preamplifier
and digital gain settings to make the best GSM measurements.
Auto Range: Press this submenu key to toggle the Auto Range function
between On and Off. When set to On, the instrument adjusts the reference
level automatically for each sweep.
Adjust Range: Press this submenu key to perform a single reference level
adjustment. Auto Range is automatically turned Off.
Figure 2-11. GSM/GPRS/EDGE Amplitude Menu
GSM/EDGE Select: Toggles between Auto, GSM and EDGE. Auto allows
the instrument to search for a GSM or EDGE signal automatically. Selecting
GSM or EDGE sets the instrument to measure only a GSM or EDGE signal.
Figure 2-12. GSM/GPRS/EDGE Setup Menu
Amplitude
Power Offset
0.0 dB Ext Loss
Auto Range
On Off
Adjust
Range
Units
dB
External Gain
dB
External Loss
Backspace
Setup
GSM/EDGE Select
Auto GSM EDGE