Agilent Technologies E4448A Manual

Chapter 4
Front-Panel Key and SCPI Command Reference
Measurement keys
263
Front-Panel Key and SCPI Command
Reference
4.4.12.1.3 Ratio Reference
If AM depth is to be displayed relative to a reference, enter the value as a ratio reference using this key.
4.4.12.1.4 Ratio Mode
The ratio and previous ratio functions permit any measurement result to be scaled to a reference. The reference
may be either a measurement result or a keyboard entry.
The Log/Linear key enables measurement results to be displayed in linear or logarithmic units. For purposes of
discussion, % for AM is treated as absolute unit. When the instrument display dB as relative unit, annunciator
REL is added to the display.
Key Path: Amplitude/Y Scale
Remote Command: :DISPlay:AUDDist:RREFerence <percent>
:DISPlay:AUDDist:RREFerence?
:DISPlay:AUDDist:RREFerence:AUTO 0|1|OFF|ON
:DISPlay:AUDDist:RREFerence:AUTO?
Preset: 100.00
State Saved: Saved in instrument state.
Min: 0.01
Max: 500.00
Example: :DISP:AUDD:RREF 100.0
:DISP:AUDD:RREF?
:DISP:AUDD:RREF:AUTO OFF
:DISP:AUDD:RREF:AUTO?
Key Path:
Amplitude/Y Scale
Remote Command: :DISPlay:AUDDist:RMODe LOG|LINear
:DISPlay:AUDDist:RMODe?
Preset: LOG
State Saved: Saved in instrument state.
Range: Log | Linear
Example: :DISP:AUDD:RMOD LOG
:DISP:AUDD:RMOD?

Agilent Technologies E4448A Specifications

General

Frequency Range	3 Hz to 50 GHz
VBW (Video Bandwidth)	1 Hz to 10 MHz
Sweep Time	1 ms to 1000 s
Phase Noise	-110 dBc/Hz at 10 kHz offset (1 GHz)
Resolution Bandwidth	1 Hz to 10 MHz
Display	Color LCD
Input Impedance	50 Ohm
Operating Temperature	0°C to 55°C
Amplitude Range	+30 dBm
Input VSWR	< 1.5:1
Input Connector	Type-N female
Power Requirements	100 to 240 VAC, 50/60 Hz