Keysight Technologies N4000A SNS Series Operating And Service Manual page 37

9 If this value has not changed, warm the SNS by wrapping your hand around its
Figure 4-8
10 If the value does not change, return the SNS to Keysight Technologies for
Operator's check for switching noise source off and on
The following procedure checks that the SNS can switch the noise source off and
on. This ensures the excess noise switches.
1 Remove any cables from the NFA input and SNS drive.
2 Press the Preset key. Wait until the preset routine has completed before
The preset condition used is the NFA default of Preset (Factory).
NOTE
Keysight N4000/1/2A Operating and Service Manual
bulkhead as shown in
thermometer time to change its ambient value. Then press the User Tcold
From SNS menu key again. The new ambient temperature value is displayed.
Operator's check for T
repair.
proceeding.
Figure 4-8 for 20 seconds. This gives the SNS
upload from SNS
cold
Operating Guide 4
37