20
3-4. Common attribute: manual/automatic triggering
Automatic triggering
(default)
The DL-2052 triggers according to the refresh rate. See the previous page for
refresh rate setting details.
Manual triggering
Press the TRIG key to trigger measurement
manually.
3-5. dBm/dB Measurement
Applicable to
(NOT applicable to ACV+DCV)
Background
Using the ACV or DCV measurement result, the DL-2052 calculates the dB or
dBm value based on a reference resistance value in the following way.
dBm
10 x log
10
(1000 x Vreading
2
/ Rref)
dB
dBm
– dBmref
Parameters
Vreading
Input Voltage, ACV or DCV
Vref
Reference voltage obtained by Rref/1mW
Rref
Reference resistance simulating an output load
dBmref
Reference dBm value
3-6. Measure dBm
Activate dBm
Press the Shift key followed by the
key. The
1st display shows dBm, and the 2nd display shows
the reference resistance.
dBm result appears
dBm
Indicates dBm measurement
600
Ω
2nd display indicates the reference resistance
Select reference
resistance
To change the reference resistance, press the
Up/Down key. The new resistance appears in the 2nd
display. The following is the resistance list.
2
4
8
16
50
75
93
110
124
125
135
150
250
300
500
600
800
900
1000
1200
8000
Deactivate dBm
measurement
To cancel the dBm measurement, press the Shift key
followed by the
key, or simply activate
another measurement.
3-7. Measure dB
Background
dB is defined as
[dBm−dBmref]. When the dB measurement is activated, the
DL-2052 calculates the dBm using the reading at the first moment and stores it
as dBmref.
Activate dB
Press the Shift key followed by the Hz/P key. The
1st display shows dB, and the 2nd display shows
the current Voltage reading.
