Anritsu spectrum master ms2711d User Manual page 85

Chapter 3 Key Functions
Select
Standard
Select
Channel
Uplink
Downlink Selects only downlink frequencies.
Back
Amplitude Menu
Pressing AMPLITUDE in Transmission Measurement mode activates a menu of ampli-
tude-related functions.
Ref Level Activates the amplitude reference level function. A specific reference
level can be entered using the keypad or Up/Down arrow key. Press
ENTER to accept the reference level value. Valid reference levels are +20
dBm to –120 dBm.
Scale Activates the scale function in a 1 through 15 dB per division logarithmic
amplitude scale. Enter the desired scale using the keypad or Up/Down ar-
row key. Press ENTER to accept.
Atten/Preamp Sets the Anritsu Spectrum Master input attenuator so that it is either cou-
pled automatically to the reference level (Auto), manually adjustable
(Manual), or dynamically controlled (Dynamic).
Auto
Manual
IMPORTANT! Attenuation is normally a coupled function and is automatically
adjusted when the reference level changes. The reference level will not change
however, when the attenuator changes. The attenuator should be adjusted so
that the maximum signal amplitude at the input mixer is –30 dBm or less. For
example, if the reference level is + 20 dBm, the attenuation should be 50 dB for
an input signal of –30 dBm at the mixer (+20 – 50 = –30). This prevents signal
compression. (This is with the preamplifier off.)
Dynamic
3-28
Select a standard using the Up/Down arrow key and press
the ENTER key to implement.
Sets the channel for the selected signal standard. Select a
channel using the Up/Down arrow key and press the
ENTER key to implement.
Selects only uplink frequencies.
Returns to the previous menu.
Press this softkey to automatically couple the attenuation to
the reference level. The automatic attenuation value is dis-
played to the left of the display below the Atten.
Sets the attenuation to manual mode. The attenuation can be
adjusted from 0 to 51 dB, in 1 dB increments, using the key-
pad or Up/Down arrow key. Press ENTER to accept the se-
lected value. The value is displayed to the left of the display
below the Atten*.
Turns on the dynamic attenuation control feature. Dynamic
attenuation tracks the input signal level, automatically ad-
justing the attenuation and preamp to give the maximum dy-
namic range without compressing the input mixer.