M403 datasheet(32/89 Pages) BK

32 / 89 page

* If the unit is changed to

dBμV,dBmV,dBVor dBm,the offset is automaticallychanged.

2. By pushing

, the step size of offset is changed. (10 dB, 1 dB, 0.1 dB)

9.6

Setting of Input Impedance

By pushing

, the input compensation can be set to 50

Ω (no offset) or75 Ω. (5.6dB offset

compensation)

The reference level is adjusted automatically, based on the input impedance selection. When the input impedance

is set to 75

Ω,the referencelevel is displayed includingoffset and conversion of 75Ω. Forthe amplitudereadingto

be correct, a coaxial

50 Ω /75 Ωimpedance conversion adaptermust be connectedtothe RFinput.

* When “75

Ω” isselected, valuesinAmplitude axissettingvaluesdisplayareawill change accordingto

Ω, andthe offset is set to 5.7dB (insertion loss of 50 Ω/75Ω adapter ).Moreover,the offset can be

changed.

When the unit at marker point is set to W, V, V/m or other, it is converted correctly from dBm.

* Be sure to attach a coaxial

50Ω /75 Ωimpedance conversion adapter when selecting“75 Ω”

9.7

Reference Level Setting Range for Each Unit

Unit

dBm

dBμV

dBmV

dBV

Maximum

117

-3

Minimum

-40

-53

Minimum

(shifted spectrum data)

-60

-13

-73

“Available unit in measuring function”

Unit

dBμV/m (Electricfield strengthmeasurement)

dBμA/m

(Magnetic field strength

measurement)

Setting

M401

M402

M403

M404

M405

M406

CP-2S

Maximum

143

146

149

150

137

159

160 ~ 203

Minimum

100

109

110 ~ 153

Minimum

(shifted spectrum

data)

90 ~ 133

* When the reference level is set between “Minimum” and “Minimum (shifted spectrum data)”, the

spectrum of “Minimum” is shifted and displayed on the screen.

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