Is Used, Otherwise It Defaults To; Resolution A Numeric Value For The Resolution. 1 To; Source List This Channel List Specifies The (@1),(@2) - Agilent Technologies EPM-P Series Programming Manual

Measurement Commands
READ[1]|2|3|4[:SCALar][:POWer:AC]:RATio? [<expected_value>[,<resolution>[,<source list>]]]
Item
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
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.
3. E4417A only.
Example
READ2:RAT? DEF,1,(@1),(@2)
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.
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Description/Default
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
ratio.
If unspecified and the current
window setup is a ratio
measurement then this ratio setup

is used, otherwise it defaults to

channel A/B (E4417A) or A/A
(E4416A).
DEF means DEFault. This is not equivalent to the DEFault
EPM-P Series Power Meters Programming Guide
Range of Values
2
1 to 4
1.0, 0.1, 0.01, 0.001
1
DEF
3
(@1),(@2)
3
(@2),(@1)
(@1),(@1)
3
(@2),(@2)
leaves the parameter
DEF
This command queries the lower
window's ratio measurement of
channel A over channel B, using
the current sensor range and a
resolution of 1 on both channels.