Radio Systems i.AM.Radio Transmitter Instruction Manual download pdf (Page 8)

i. Select direct low frequency readout using meter Function 13. This

is done by selecting F13 on the meters front panel and setting the

instrument to then BC.

ii. Set BANDWIDTH to 15 kHz (NB)

iii. Turn FSM RF Amplifier OFF

iv. Set AUDIO to AM (This setting does not affect measurements in

any way. It only affects the detector driving the internal speaker.)

v. If not in the dBuV read out mode, set measurement units to dBuV

using meter function F14 (switches between dBm and dBuV) and

confirm signal strength is within range (+90dBuV to +10dBuV) (-

17dBm to –97dBm) of field strength meter. If the signal to be

measured is larger than –17dBm +90dBuV the SIGNAL LEVEL

readout will display "> -17 dBm 90dBuV " with the ">" sign

blinking. A calibrated 30 dB, 50 ohm coaxial pad may be installed

at input to block converter if signal strength is too high.

vi. Set measurement units to dBuV/m using meter function F15 (F15

activates inclusion of Antenna Factors from the resident table

within the meter. This resident table is unique to your calibrated

antenna and may be programmed into your meter using the

supplied Load_Tab.exe application.)

vii. Read field strength directly in dBuV/m on Field Strength Meter

front panel.

b. If making measurement using the PC application:

i. Set BANDWIDTH to 15 kHz (NB)

ii. Turn FSM RF Amplifier OFF

iii. Set AUDIO to AM (This setting does not affect measurements in

any way. It only affects the detector driving the internal speaker.)

iv. Using the FSM front panel, confirm that the meter reads in the

dBuV. If not in the dBuV read out mode, set measurement units to

dBuV using meter function F14 (switches between dBm and

dBuV) and confirm signal strength is within range (+90dBuV to

+10dBuV) of field strength meter. If the signal to be measured is

larger than +90dBuV the SIGNAL LEVEL readout will display ">

90dBuV " with the ">" sign blinking. A calibrated 30 dB, 50 ohm

coaxial pad may be installed at input to block converter if signal

strength is too high.

v. Place the FSM in Remote mode by selecting function 93 (F93) on

the meter front panel.

vi. Connect the meter to the PC serial port

vii. Launch the Application by double clicking on the desktop icon.

viii. Enter antenna factor for sum of antenna and cable and pad (if used)

ix. Read field strength directly in dBuV/m on the PC display.

4. For mobile measurements using Z Technology GPS aware software:

a. As described in an earlier section, set frequency, bandwidth, block

converter offset, antenna factor, and readout mode on the FSM front panel.

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Radio Systems i.AM.Radio Transmitter Instruction Manual Page 8

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