Anritsu BTS Master MT8221B, User Manual

Page: 212 / 362

4-9 Amplitude Menu TD-SCDMA/HSPA+ Signal Analyzer
4-16 PN: 10580-00234 Rev. V 3GPP MG
4-9 Amplitude Menu
Key Sequence:
Amplitude
Scale/div: Press this submenu key to change the scale of the y-axis in the
measurement display. The range of the scale can be set from 1 dB/div to
15 dB/div in steps of 1 dB/div. The value can be changed using the numeric
keypad, rotary knob, or the arrow keys. This setting applies to the Channel
Spectrum, Power vs. Time, and Spectrum Emission views only.
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.
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.
Units: Press this submenu key to view the power measurements in dBm or
watts.
Figure 4-11. TD-SCDMA/HSPA+ Amplitude Menu
Amplitude
Power Offset
0.0 dB Ext Loss
Auto Range
On Off
Adjust
Range
Scale / div
10 dB/div
Units
dBm Watts
Units
dB
External Gain
dB
External Loss
Backspace