U1270 Datasheet, PDF (15/19 Pages) Agilent(Hewlett-Packard) – Agilent U1270 Series Handheld Digital Multimeters

Decibel (dB) for U1272A ^{[1] - [3]}
dB base
1 mW (dBm)
1 V(dBV)
Reference
1 to 9999 Ω
1V
Default reference
50 Ω
1V
1. The reading of dBm is indicated in decibels of power above or below 1 mW, or decibels of voltage above or below 1 V. The
formula is calculated according to the voltage measurement and specified reference impedance. Its accuracy is
depended on the accuracy of the voltage measurement. See Decibel (dBV) accuracy table below.
2. Auto-ranging mode is used.
3. The bandwidth is according to voltage measurement.
Decibel (dBV) accuracy
Range
30 mV
300 mV
3V
30 V
300 V
1000 V
dBV range
Minimum Maximum
-56.48
-36.48
-16.48
+3.52
+23.52
+33.98
-30.46
-10.46
+9.54
+29.54
+49.54
+60
Accuracy
45 to 65 Hz
20 Hz to
1 kHz
1 Hz to
5 kHz
5 kHz to
20 kHz
20 Hz to
100 kHz
0.06
0.07
0.09
0.1
0.32
0.06
0.07
0.09
0.1
0.32
0.06
0.09
0.14
0.19
0.32
0.06
0.09
0.14
0.19
0.32
0.06
0.09
0.14
0.19
-
0.06
0.09
0.14
-
-
Measurement rate (approximate)
Function
ACV
DCV
Ω
Ω with offset compensation
Diode
Auto Diode
Capacitance
DCI
ACI
Temperature
Frequency
Duty cycle
Pulse width
U1271A
7
7
14
-
14
-
4 (<100 µF)
7
7
7
2 (>10 Hz)
1 (>10 Hz)
1 (>10 Hz)
Times/second
U1272A
7
7
14
3
14
3
4 (<100 µF)
7
7
7
2 (>10 Hz)
1 (>10 Hz)
1 (>10 Hz)
15