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Measuring Function
19.3 Occupied frequency bandwidth measurement <Occ BW> F3
Measures the bandwidth at the point of N [%] of total power (N% POWER) or the bandwidth at the point X [dB] down from the peak level (XdB DOWN). Two modes are available. N% POWER mode [Use F1 (MODE) to select N%.] Measures the bandwidth at the point of N [%] of total power displayed on the screen. 1. Use
F2
(dB) and
to set the down level from peak level.
Setting range: 0.1 to 80.0 dB.
19.4 Electric field strength measurement <E/F ANT> F4
Measures electric field strength by connecting an optional antenna. Allows using an antenna other than options by creating and inputting the original compensation table (Refer to �23.6 Writing of original compensation data� for how to create and write).
It is shown on MEAS area of LCD as �OBW N%� The measured value is displayed at the right lower corner on the screen.
�Specifications of the antenna (antenna gain and VSWR are specified at a center of frequency range). �
Items Type Frequency range Antenna gain VSWR Dimensions Weight Reference level setting range M301 Sleeve 0.8 to 1.0 GHz +1 dBi or higher 1.5 or lower 7 ��250 mm .5 approx.20 g 93 to 143 dBµV/m M302 Sleeve 1.25 to 1.65 GHz +1 dBi or higher 1.5 or lower 7 ��250 mm .5 approx.20 g 96 to 146 dBµV/m M303 Sleeve 1.7 to 2.20 GHz +1 dBi or higher 1.5 or lower 7 ��180 mm .5 approx. 20 g 98 to 148 dBµV/m
1. Use F2 power.
(RATIO) and
to set the percentage to total
Setting range: 80.0 to 99.9 %.
XdB DOWN mode [Use F1 (MODE) to select XdB.] Measures the bandwidth at the point X [dB] down from the peak level.
(except for the minimum value in screen shift) Items Type Frequency range Antenna gain VSWR Dimensions Weight Reference level setting range M304 Sleeve 2.25 to 2.65 GHz +1 dBi or higher 1.5 or lower 7 ��180 mm .5 approx. 20g 100 to 150 dBµV/m M305 1/4 λ whip 300 to 500 MHz +1 dBi or higher 1.5 or lower 8.0 ��195 mm approx.30 g 87 to 137 dBµV/m
It is shown on MEAS area of LCD as �OBW XdB� . The measured value is displayed at the right lower corner on the screen.
(except for the minimum value in screen shift)
Measured value varies depending on how to have HM5033 main unit. Moreover, if the person who has is different, measured value will vary. Because M305 is 1/4 λ whip antenna. Therefore, in the measurement used an antenna M305, measurement errors occurs. The error value is several dB or 10 dB or more. In order to lessen the error value, use it, separating from the body as much as possible so that there is no influence of human body.
Mode selection and measurement Use F1 (ANT) to select an antenna, M301, M302, M303, M304, M305 or USER. As soon as the antenna is entered, the measurement is taken.
