494 Keysight N9927-90001 User’s Guide
System Settings
System Configuration
Variable Voltage Source (Opt. 309)
An internal DC source, available with Opt. 309, may be used to provide power
for external devices. The maximum power available is 8 watts.
The voltage is output through an SMB (m) output connector located on the
left-side panel. See the connector in
An optional SMB (f) to BNC (m) bias-tee power cable is available with Keysight
part number: N9910X-713.
The following status line is provided near the top of the FieldFox screen.
Figure 25-2
How to make Voltage Source settings
— Press
System 7
— Then
System Configuration
.
— Then
Voltage Source
.
— Then
Source ON OFF
to enable and disable the voltage source output.
— Then Voltage x.xx V Using
arrows, the rotary knob, or numeric
keypad, enter a value between 0.001 and 32 volts.
IMPORTANT!
Noise Figure mode uses DC variable voltage source (VVS) –
(Option 309) during the measurements. The voltage might be as high as
28V during the measurement. During the noise figure measurement,
always make sure there are no voltage sensitive devices connected to the
DC SMB output port. Refer to
Chapter 23, “Noise Figure Mode (Option 356
.
When you initially change the FieldFox mode to Noise Figure, the FieldFox
displays the following message for ten seconds:
"
Ensure your Noise Source is connected to the VVS DC Output
It (VVS) will be driven up to +28V during the measurement
".
Voltage Source Status Line
1. Voltage source state: ON, OFF, TRIPPED.
2.
Voltage
setting from 1.00 V to 32.00 V with.01 V resolution.
3.
Current:
The amount of current (in Amperes) being drawn from the source.
4.
Max Current: A
conservative estimate of maximum current possible given
the present voltage setting. The actual ‘trip’ level may be slightly different.
Содержание N9913A
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