HP E4418B Programming Manual page 185

MEASurement Instructions
READ[1|2][:SCALar][:POWer:AC]:RATio:RELative? [<expected_value>[,<resolution>[,<source list>]]]
1. The mnemonic
parameter used in the command sub-systems. The parameters must be entered in
the specified order. If parameters are omitted, they will default from the right.
The parameter DEFault is used as a place holder. Specifying
parameter value unchanged.
2. When the measurement result is linear this parameter represents the number
of significant digits. When the measurement result is logarithmic 1 to 4
represents a resolution of 1, 0.1, 0.01 and 0.001 respectively.
Example
READ:RAT:REL?
Error Messages
INITiate:CONTinuous must be set to OFF on both channels, otherwise
error -213, "INIT ignored" occurs.
If TRIGger:SOURce is set to BUS or HOLD on either channel, error -214,
"Trigger deadlock" occurs.
If the resolution parameter is not the same as the current resolution
setting on the specified window, error -221, "Settings conflict" occurs.
2-48
Item Description/Default
resolution 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.
source list This channel list specifies between
which channels the ratio is
calculated. If unspecified and the
current window setup is a ratio
measurement then this ratio setup
is used, otherwise it defaults to
channel A/B.
means DEFault. This is not equivalent to the DEFault
DEF
Range of Values
2
1 to 4
1.0, 0.1, 0.01, 0.001
1
DEF
(@1),(@2)
(@2),(@1)
DEF
This command queries the
relative ratio measurement on
the upper window.
HP E4418B/E4419B Programming Guide
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