YOKOGAWA TA220 User Manual page 75

7.2 Measurement of the RF Signal Voltage Level and DC Output of the Voltage Level
IM 704610-01E
Selecting the Voltage Level DC Output Mode
You can select whether voltage level DC output or determination output is output from
the voltage level DC output terminal (LEVEL DC OUT) on the rear panel.
• LEVEL (Voltage Level DC Output)
The voltage level of the RF signal can be converted to DC voltage (0 to 5 V) and
output from the voltage level DC output terminal on the rear panel. You can specify
the voltage levels that will output 5 V (upper limit) or 0 V (lower limit), and output a DC
voltage that is proportional to the voltage level. However, if more than 5 V is
calculated, 5 V is output. For the setting range of the upper and lower limit, see
"Upper and Lower Limit of the Voltage Ratio DC Output Range" below.
When the upper limit is set to 5 V and the lower limit to 1 V
5.0
Output
voltage
(VDC)
0.0
1
Voltage level
Note
• For information on the update interval of the voltage level DC output, see the Note in
section 4.5.
• The voltage level DC output is not available when D-to-C high speed calculation is ON
(see section 4.9). The voltage level is always set to 0 V.
• JudGE (Determination Output)
The voltage level of the measured RF signal is determined according to a previously
specified determination range. 5 VDC is output from the DC voltage output terminal
when the voltage level is between the upper and lower limit of the determination
range, and 0 VDC is output when the voltage level exceeds the upper limit or is less
than or equal to the lower limit. For the setting range of the upper and lower limit, see
"Upper and Lower Limit of the Voltage Ratio Determination Range" below.
Example with the determination range set 2 to 3 V.
3V
Determination range
2V
5.0
Output voltage
(VDC)
0.0
Upper and Lower Limit of the Voltage Level DC Output Range
You can set the upper and lower limit of the voltage level DC output range in the
following range. The upper and lower limits correspond to 5 VDC and 0 VDC,
respectively.
Setting range: 0.00 to 5.000 V (in steps of 0.001 V)
If the lower limit is set equal to or higher than the upper limit (or vice versa), the upper
and lower limits are set to the same value.
5
Changes in the voltage level
Time
7
7-9