Other topics about Making Measurement
The E5071C has one trigger source. When this trigger source detects a trigger signal that has occurred, a sweep is performed for channels in the "Initiate" state in the order of channel 1 to channel 36. You set the "Initiate" or "Idle" status of each channel by changing the trigger mode.
The execution of measurement for each channel does not depend on whether the channel is displayed. Channels that have been activated can be measured even if they are not displayed.
For each channel, a sweep is performed only for the stimulus ports needed to update the parameters of the displayed trace.
In a channel, each test port is set to a stimulus port in the order of port number and updates each trace.
|
Sweep Order |
Stimulus Port |
Updated Trace |
|
1 |
Port 1 |
S11, S21, S31, S41 |
|
2 |
Port 2 |
S12, S22, S32, S42 |
|
3 |
Port 3 |
S13, S23, S33, S43 |
|
4 |
Port 4 |
S14, S24, S34, S44 |
If full 2, 3, or 4-port error correction is in effect, no trace between calibrated ports is updated until the last calibrated port is swept as the stimulus port.
Sweep is not executed for stimulus ports that are not required for updating traces.
The trigger source generates a cue signal that initiates a measurement process. Four types of trigger sources are available.
|
Trigger Sources |
Function |
|
Internal (Internal) |
Uses a consecutive signal generated by the firmware as a trigger source. Triggers are sent immediately following the completion of each measurement. |
|
External (External) |
Uses the external trigger input terminal (BNC) or Handler I/O (Pin No. 18) as a trigger source. |
|
Manual (Manual) |
A trigger is generated by pressing Trigger > Trigger. |
|
Bus (Bus) |
A trigger is generated through GPIB/LAN/USB. |
The Trigger Scope specifies the scope of the triggering, whether it is for all channels (default) or for the selected channel.
When this function is enabled with a value of "ACTive", only active channel is triggered. When this function is enabled with a value of "ALL", all channels of the E5071C are triggered.
For example, if Trigger Scope is set to "ACTive" when Trigger > Continuous is selected for all channels, a measurement channel is automatically changed by switching over the active channel.
|
Trigger Scope |
Function |
|
All Channel |
Triggers ALL channels which are in "Initiate" status |
|
Active Channel |
Triggers Active channel which is in "Initiate" status |
You can set the trigger mode for each channel independently. This allows you to control the operation of each channel after a trigger signal is detected by setting the channel's status with the trigger mode.
|
Trigger mode name |
Function |
|
Sweep stop (Hold) |
The status ("Idle" status) in which the sweep is stopped. When a trigger signal is detected, the sweep is not performed. |
|
Single sweep (Single) |
An "Initiate" status. When a trigger signal is detected, a sweep is performed. After completion of the sweep, the "Idle" status is activated. |
|
Continuous sweep (Continuous) |
An "Initiate" status. When a trigger signal is detected, a sweep is performed. After completion of the sweep, the "Initiate" status is maintained. The sweep is repeated each time a trigger signal is detected. |
|
Hold All Channels |
Sets all channel trigger modes to hold sweep mode |
|
Continuous Disp Channels |
Sets trigger modes of all displayed channels (Display > Allocate Channels) to continuous sweep mode |
Follow the procedure below to select a trigger source.
Press Trigger.
Click Trigger Source.
Click the softkey that corresponds to the desired trigger source.
When External is selected as a trigger source, click Ext Trig Input to select trigger polarity.
|
Softkey |
Function |
|
Negative Edge |
Triggered at negative edge of an external trigger input signal. |
|
Positive Edge |
Triggered at positive edge of an external trigger input signal. |
The setting for trigger polarity is not valid for the external trigger from Hander I/O.
Follow the procedure below to select a trigger mode.
Press Trigger key.
Click Trigger Scope.
Click the softkey that corresponds to the desired trigger scope:
|
Trigger Scope |
Function |
|
All Channel |
Triggers ALL channels |
|
Active Channel |
Triggers Active channel alone. |
Follow the procedure below to select a trigger mode.
Press Channel Next/Channel Prev keys to select the channel for which the trigger mode will be set.
Press Trigger key.
Press the softkey that corresponds to the desired trigger mode. Repeat the procedure until each channel is set for its trigger mode.
|
Softkey |
Function |
|
Hold |
Sets active channel trigger mode to hold sweep mode |
|
Single |
Sets active channel trigger mode to single sweep mode |
|
Continuous |
Sets active channel trigger mode to continuous sweep mode |
|
Hold All Channels |
Sets all channel trigger modes to hold sweep mode |
|
Continuous Disp Channels |
Sets trigger modes of all displayed channels (Display > Allocate Channels) to continuous sweep mode |
Next, it is necessary to generate a trigger by using the trigger source selected in Selecting a Trigger Source.
Once the internal trigger source is selected, a series of triggers is continuously generated as soon as the setting becomes effective.
Pressing Trigger > Restart during a sweep forces the analyzer to abort the sweep.