Keysight Technologies P Series Programming Manual page 166

2 MEASurement Commands
Item
expected_value
(for the expected power
level)
resolution
source list
[a] The mnemonic DEF means DEFault. This is not equivalent to the DEFault parameter used in the command sub-systems. The parameters must
be entered in the specified order. If parameters are omitted, they default from the right. The parameter DEFault is used as a place holder.
Specifying DEF leaves the parameter value unchanged.
[b] When the measurement result is linear this parameter represents the number of significant digits. When the measurement result is
logarithmic 1 to 4 represents of 1, 0.1, 0.01 and 0.001 respectively.
Example
Error Messages
– INITiate:CONTinuous must be set to OFF on both channels, otherwise error
– If TRIGger:SOURce is set to BUS or HOLD on either channel, error –214, "Trigger
– If the resolution parameter is not the same as the current resolution setting on
166
Description/Defaul t
The power meter ignores the numeric value entered in this
parameter. Any value entered is treated like DEF.
A numeric value for the resolution. If it is unspecified the current
resolution setting is used. If a value is entered it should correspond
to the current resolution setting otherwise an error occurs.
This channel list specifies the channels used to calculate the
difference.
If unspecified and the current window setup is a difference
measurement then this difference setup is used, otherwise it
defaults to Channel A-B.
READ1:DIFF:REL? DEF,4,(@2),(@1)
–213, "INIT ignored" occurs.
deadlock" occurs.
the specified window, error –221, "Settings conflict" occurs.
Range of Values
Sensor dependent
[a]
DEF
[b]
1 to 4
1.0, 0.1, 0.01, 0.001
[a]
DEF
(@1),(@2)
(@2),(@1)
(@1),(@1)
(@2),(@2)
This command queries the upper
window/upper measurement relative
difference measurement of
Channel B - Channel A, using the
current sensor range and a resolution
setting of 4 on both channels.
Keysight N8262A Programming Guide