Sanwa EM7000, Инструкция по эксплуатации, Страница: 47 / 68

DRAWING No.EM7000 09-1306 2040 2040
Detach the test pins from the circuit to be measured.
Turn off the power switch (power OFF: Lamp blinking goes off).
*Note : The dB scale of this unit are drawn in accordance with
the AC 3 V range, assuming that the output level is 0 dB
when the impedance (Z) at the measuring point is 600
Ω
and the output is 1 mW. If 0dB is converted to the
voltage, 0dB is 0.775 V (1 mW = E
2 /Z). When the
impedance at the measuring point is other than 600
Ω
,
obtain a value to add from the following table according
to impedance values, and add it to the value obtained in
and
.
Observe the same precautions as those for the measurement
of AC voltage (ACV rms).
— 43 —
Impedance Value to add Impedance Value to add Impedance Value to add
2 k
Ω
-5.2 dB 300
Ω
+3 .8 dB 16
Ω
+15.8 dB
1 k
Ω
-2.2 dB 150
Ω
+6 .8 dB 8
Ω
+18.8 dB
500
Ω
+0.8 dB 50
Ω
+10.8 dB 4
Ω
+21.8 dB
EM7000_08_英_再校 13.6.10 1:26 PM ページ17