OUTPut Subsystem

OUTPut[1|2] {ON|1|OFF|0}
OUTPut[1|2]?

Enables or disables the front panel output connector.

Parameter	Typical Return
{ON|1|OFF|0}, default OFF	0 (OFF) or 1 (ON)
Enable output connector for channel 1: OUTP ON

• When output is enabled, the front panel channel output key is illuminated.
• The APPLy commands override current OUTPut setting and enable the channel output connector.
• If excessive external voltage is applied to the front panel channel output connector, an error message appears and output is disabled. To re-enable output, remove overload from the output connector and send OUTPut ON.
• OUTPut changes the state of the channel output connector by switching the output relay, without zeroing output voltage. Therefore, output may glitch for about a millisecond until signal stabilizes. Minimize glitching by first minimizing amplitude (VOLTage MIN) and setting offset to 0 (VOLTage:OFFSet 0) before changing output state.
• This command also toggles the output impedance between 50 Ω (ON) and high (>1MΩ) impedance (OFF).

OUTPut[1|2]:LOAD {<ohms>|INFinity|MINimum|MAXimum|DEFault}
OUTPut[1|2]:LOAD? [{MINimum|MAXimum}]

Sets expected output termination. Should equal the load impedance attached to the output.

Parameter	Typical Return
1 Ω to 10 kΩ, default 50 Ω	+5.000000000000000E+02
Set output impedance to 300 Ω: OUTP:LOAD 300 Set output impedance to "high impedance": OUTP:LOAD INF

• The specified value is used for amplitude, offset, and high/low level settings.
• The instrument has a fixed series output impedance of 50 Ω to the front panel channel connectors. If the actual load impedance differs from the value specified, the displayed amplitude and offset levels will be incorrect. The load impedance setting is simply a convenience to ensure that the displayed voltage matches the expected load.
• If you change the output termination setting, the displayed output amplitude, offset, and high/low levels are adjusted (with no error generated). If the amplitude is 10 Vpp and you change the output termination setting from 50 Ω to "high impedance" (OUTPut[1|2]:LOAD INF), the displayed amplitude doubles to 20 Vpp. Changing from "high impedance" to 50 Ω halves the displayed amplitude. The output termination setting does not affect the actual output voltage; it only changes the values displayed and queried from the remote interface. Actual output voltage depends on the connected load.
• You cannot specify output amplitude in dBm if output termination is set to high impedance. The units are automatically converted to Vpp. See VOLT:UNIT for details.
• You cannot change the output termination setting with voltage limits enabled; the instrument cannot know which output termination settings the voltage limits apply to. To change the output termination setting, disable voltage limits, set the new termination value, adjust voltage limits, and re-enable voltage limits.
• If INF (high impedance) is selected, the query returns 9.9E+37.

OUTPut[1|2]:MODE {NORMal|GATed}
OUTPut[1|2]:MODE?

Enables (GATed) or disables (NORMal) gating of the output waveform signal on and off using the trigger input.

Parameter	Typical Return
{NORMal|GATed}, default NORMal	GAT or NORM
Enable gated output: OUTP:MODE GAT

• The effect of gating is independent of waveform phase or timing of any sort. When trigger input is asserted, the output signal is generated. When trigger is not asserted, the waveform continues to be generated internally, but it is not routed to channel output connector.
• Gating does not change channel output termination (does not operate output on/off relay).

OUTPut[1|2]:POLarity {NORMal|INVerted}
OUTPut[1|2]:POLarity?

Inverts waveform relative to the offset voltage.

Parameter	Typical Return
{NORMal|INVerted}, default NORMal	NORM or INV
Set output polarity to INVerted: OUTP:POL INV

• NORMal: waveform goes in one direction at the beginning of the cycle;
  
  INVerted: waveform goes in other.
• As shown below, the waveform is inverted relative to the offset voltage. The offset voltage remains unchanged when the waveform is inverted.
  
  

• The Sync signal associated with an inverted waveform is not inverted.

OUTPut:SYNC {ON|1|OFF|0}
OUTPut:SYNC?

Disables or enables the front panel Sync connector.   

Parameter	Typical Return
{ON|1|OFF|0}, default ON	0 (OFF) or 1 (ON)
Disable front panel Sync connector: OUTP:SYNC OFF

• Disabling the Sync signal reduces output distortion at lower amplitudes.
• For more details on the Sync signal for each waveform function, see Sync Output Signal.
• When Sync is disabled, the output level on the Sync connector is a logic "low."
• Inverting a waveform (OUTPut[1|2]:POLarity INV) does not invert the Sync signal.

OUTPut[1|2]:SYNC:MODE {NORMal|CARRier|MARKer}
OUTPut[1|2]:SYNC:MODE?

Specifies normal Sync behavior (NORMal), forces Sync to follow the carrier waveform (CARRier), or indicates marker position (MARKer).

Parameter	Typical Return
{NORMal|CARRier|MARKer}, default NORMal	NORM, CARR, or MARK
Set output sync mode to CARRier: OUTPut:SYNC:MODE CARR

• The following table details the command's behavior:
  
  

  <mode>	Sync Behavior	Conditions
  NORMal	Sync follows envelope of burst signal.	When BURSt is on
  	Sync follows envelope of sweep signal.	When SWEep is on
  	Sync follows modulating signal.	When modulating and modulation source is internal
  	Sync follows FUNC signal.	All other conditions
  CARRier	Sync follows current SOURce:MARKer:POINt setting.	When BURSt or SWEep is on and FUNC is ARB
  	Sync follows FUNC signal while burst is on.	When BURSt is on and FUNC is not ARB
  	Sync follows FUNC signal.	All other conditions
  MARKer	Sync follows current SOURce:MARKer:POINt setting.	When in CW mode and FUNC is ARB When modulating, modulation source is internal, and FUNC is ARB or <modulation>:INT:FUNC is ARB When modulating, modulation source is external, and FUNC is ARB
  	Sync follows current SOURce:MARKer:CYCLe setting.	When BURST is on
  	Sync follows current SOURce:MARKer:FREQuency setting.	When SWEEP is on
  	Sync follows modulating signal.	When modulating, modulation source is not external, FUNC is not ARB, and INT:FUNC is not ARB
  	Sync follows FUNC signal.	All other conditions

OUTPut[1|2]:SYNC:POLarity {NORMal|INVerted}
OUTPut[1|2]:SYNC:POLarity?

Sets the desired output polarity of the Sync output to trigger external equipment that may require falling or rising edge triggers.

Parameter	Typical Return
{NORMal|INVerted}, default NORMal	NORM or INV
Set the instrument's output sync connector to normal behavior: OUTP:SYNC:POL NORM

• NORMal: voltage on Sync output connector is near zero, and rises when a Sync event occurs. Voltage stays high (approximately 3.3 V into high impedance) until Sync signal is de-asserted, when it falls back to near zero.
• INVerted: opposite of NORMal.
• The Sync signal may be derived from either channel in a two-channel instrument (OUTPut:SYNC:SOURce), and from several operating modes of the Sync signal (OUTPut:SYNC:MODE).

OUTPut:SYNC:SOURce {CH1|CH2}
OUTPut:SYNC:SOURce?

Sets the source for the Sync output connector.

Parameter	Typical Return
{CH1|CH2}, default CH1	CH1 or CH2
Set sync source to channel 2: OUTP :SYNC:SOUR CH2

OUTPut:TRIGger {ON|1|OFF|0}
OUTPut:TRIGger?

Disables or enables the "trigger out" signal for sweep and burst modes.

Parameter	Typical Return
{ON|1|OFF|0}, default OFF	0 (OFF) or 1 (ON)
Enable trigger out signal: OUTP:TRIG ON

• When enabled, a pulse with the specified edge direction (OUTPut:TRIGger:SLOPe) is output from the rear-panel Ext Trig connector at the beginning of the burst or sweep.
• In triggered burst mode:
• With TRIGger[1|2]:SOURce IMMediate, instrument outputs square wave with 50% duty cycle from the Ext Trig connector. The waveform period equals the burst period (BURSt:INTernal:PERiod).
• With TRIGger[1|2]:SOURce EXTernal or BURSt:MODE GAT, the instrument disables "trigger out." The rear-panel Ext Trig connector cannot be used for both operations simultaneously (an externally-triggered waveform uses the same connector to trigger sweep or burst).
  
• With TRIGger[1|2]:SOURce BUS, the instrument outputs a pulse (>1 μs pulse width on the 33500 Series and 100 ns on the 33600 Series) from the Ext Trig connector at the beginning of each sweep or burst.
• In frequency sweep mode:
• With TRIGger[1|2]:SOURce IMMediate, the instrument outputs a square wave with a 50% duty cycle (the rising edge is the sweep trigger) from the Ext Trig connector. Waveform period equals to the sweep time (SWEep:TIME).
• With TRIGger[1|2]:SOURce EXTernal, instrument disables the "trigger out" signal. The rear-panel Ext Trig connector cannot be used for both operations simultaneously (an externally-triggered sweep uses the same connector to trigger the sweep).
• With TRIGger[1|2]:SOURce BUS, the instrument outputs a pulse (>1 μs pulse width on the 33500 Series and 100 ns on the 33600 Series) from the Ext Trig connector at the beginning of each sweep or burst.

OUTPut:TRIGger:SLOPe {POSitive|NEGative}
OUTPut:TRIGger:SLOPe?

Selects whether the instrument uses the rising edge or falling edge for the "trigger out" signal.

Parameter	Typical Return
{POSitive|NEGative}, default POSitive	POS or NEG
Set trigger slope to NEGative (falling edge): OUTP:TRIG:SLOP NEG

• POSitive outputs a rising edge pulse; NEGative outputs a falling edge pulse.
• When enabled using OUTPut:TRIGger, a pulse with the specified edge direction is output from the rear-panel Trig Out connector at the beginning of a sweep or burst.

OUTPut:TRIGger:SOURce {CH1|CH2}
OUTPut:TRIGger:SOURce?

Selects the source channel used by trigger output on a two-channel instrument. The source channel determines what output signal to generate on the trigger out connector.

Parameter	Typical Return
{CH1|CH2}, default CH1	CH1 or CH2
Set output trigger source to CH2: OUTP:TRIG:SOUR CH2

• In a two-channel instrument, either channel may be source channel for the trigger output, but channel 2 is not valid for dual arbitrary (IQ) waveforms.