90PGA
Section 2
Dual Channel Programmable
Remote Operation
Amplifier Card
9
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Table 2
defines the 90PGA command set:
Note:
The expected values are responses from the 90IP with no software driver processing.
Command
Function
Expected/Set to Value
IDN?
Returns a string representing the instrument’s
identification name.
“FreqDev,90IP\n”
GPIB?
Returns a string representing the instrument’s
GPIB primary address.
A value from 00 to 30.
WHO?
Returns a string list representing the cards
present in the 90IP slots.
The list will show
every card properly inserted into a slot and
loaded into the 90IP.
“CARD 1,2,3,4\n” for a fully loaded 90IP.
CARD?
Returns a string representing the active card
type.
“2 CHAN PGA\n” for a 2 channel amplifier type
card.
GAIN?
Returns a string value representing the active
card/channel gain setting.
A value from 00.0dB to 64.5dB in 0.5dB
increments.
CUPL?
Returns a string representing the active card
coupling mode setting.
“AC\n” coupled or “DC\n” coupled.
INPUT?
Returns a string representing the active card
input mode setting.
“SNGL\n” single-ended or “DIFF\n” differential-
ended.
OFFSET?
Returns a string value representing the active
card DC offset setting.
A value from “-100mV” to “100 mV”, for example: “-
05 mV”, “09 mV”, “10 mV”, etc.
DC
Sets the coupling mode of an active card
channel to DC.
Set DC coupled mode.
AC
Sets the coupling mode of an active card
channel to AC.
Set AC coupled mode.
SNGL
Sets the input mode of an active card channel to
single-ended.
Set the current channel to the single-ended mode.
DIFF
Sets the input mode of an active card channel to
differential-ended.
Set the current channel to the differential-ended
mode.
CARD=n
Selects an active card.
Select a card where n is 1, 2, 3 or 4.
CHAN=n
2 (See note)
Selects an active card channel.
Select a channel where n is 1 or 2.
GAIN=xy.z
Sets the gain of an active card channel.
Set the gain where x can be any number from 0 to
6, y can be any number from 0 to 9 and z is 0 or 5.
NOTES: x cannot be a leading zero, x may be
dropped, and y and z must always exist.
SAV=n
Saves the parameter settings of a card/channel
to a specific configuration from a list of
configurations. This set will contain the active
card/channel parameter value settings.
Save current parameters into a configuration
where n is a value from 1 to 9.
OFFSET=sxyy
Sets the dc offset of an active card channel.
Set the offset where s is the sign NOT used in
positive numbers, x is a number from 0 to 1, and y
is a number from 0 to 9. Numbers are left justified.
Leading zeroes may be dropped.
CFG=n
Initializes the parameters of a card/channel to a
specific configuration from a list of
configurations. This set will configure the active
card/channel.
Restore parameters from a configuration into
active card parameters where n is a value from 1
to 9.
2. NOTE: “CHAN?” is undefined for the 90PGA slot card.
Table 2 – 90PGA Command Set
