Command Reference
R&S
®
ZNC
461
User Manual 1173.9557.02 ─ 13
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CONTrol:AUXiliary:C[:DATA]
<DecValue>
Sets or queries a channel-dependent eight-bit decimal value to control eight independent
output signals at the USER PORT connector (lines 8, 9, 10, 11 and lines 16, 17, 18, 19).
The output signals are 3.3 V TTL signals which can be used to differentiate between up
to 255 independent analyzer states.
CONTrol:AUXiliary:C[:DATA]
itself does not
change the analyzer state.
Channel bit definition and activation
The channel bits have the following properties:
●
After a *RST of the analyzer all channel bits (including the value for the active,
sweeping channel no. 1) are set to zero; no signal is applied to pins 8 to 11 and 16
to 19 of the USER PORT connector.
●
The value defined with
CONTrol:AUXiliary:C[:DATA]
is assigned to the
active
<Ch>
).
●
The signals at the USER PORT connector reflect the channel bits of the
measur-
ing
channel, i.e. the channel for which the analyzer performs a sweep. This channel
is not necessarily identical with the active channel.
●
The signals are switched on as soon as a measurement (sweep) in a channel with
non-zero channel bits is started. They are changed whenever a channel with different
channel bits becomes the measuring channel.
●
The signals at the USER PORT connector are maintained after the analyzer enters
the hold state. This happens if all channels use single sweep mode and if all sweep
sequences have been terminated.
●
Pins 16 to 19 may be reserved for monitoring the drive ports 1 to 4 of the analyzer (
OFF
) . This leaves up to 16 different monitored channel
states.
Tip:
A simple application consists of selecting the channel numbers as parameters for
CONTrol:AUXiliary:C[:DATA]
and monitor the activity of up to 255 different chan-
nels at the USER PORT connector; see example below. You can also use the USER
PORT output signals as channel-dependent trigger signals for external devices. Use
to transfer the eight bit value for an arbitrary channel
<Ch> in binary representation.
SCPI Command Reference