Connections; Initialization; Setup - Berkeley Varitronics Systems YellowFrog 2 Wideband Manual

Battery Maintenance Note
The only maintenance needed by the YF2 unit is periodic charging of the internal Lithium-Ion Polymer
battery whenever the red LED near the DC charging port (on the input side of the unit) turns on. After
charging adequately, this LED will turn off. If the unit is used without charging after the battery LED
turns on, eventually the message "LOBAT" will be displayed in the LCD. This message will disappear
when the battery is.

Connections

Connect the YF2 unit input side (this is the side with the power switch and engraved serial number of
the YF2 unit) to the RF source and the output side (this is the side with the USB port) to a 50 Ohm load
or termination. If the YF2 is used with a computer, the USB port on the YF2 is connected to the
computer USB port by the provided cable.

Initialization

The unit is initialized by turning on the power switch. After this, if an input signal is applied and the
output of the YF2 is properly terminated by a 50 Ohm load, the reading will be displayed on the LCD
and the units (dBm or Watt) are indicated by one of the LEDs to the right of the LCD. If the unit is set
to read in both units, then the two LEDs will alternate continuously as the measurements are made.

Setup

Start the YF2 Power Meter software. Enter the unit settings in the following order:
Frequency:
Enter in units of (MHz) either by scrolling the small triangles up/down or by directly entering a number
in the Frequency field.
Power Offset:
This field is used to enter the loss in the cable used to connect the input RF port of the unit to the signal
source, in multiples of 0.1 dB. If the loss is below 0.1 dB, enter "0".
Signal Type (Optimize for Technology)
The unit will measure true RMS level for a pure sinusoid (CW) or a carrier modulated as a CDMA,
GSM or W-CDMA signal. Select one of the four types of signal under "Optimize for Technology"
Units (dBm or Watts)
Select one or both units. If one unit is selected, the reading is displayed steadily on the LCD, with the
corresponding LED steadily on. If both units are selected the LCD and the LEDs will alternate to
indicate both readings continuously.
After these parameters are selected, press the "SET" button under "UNIT SETUP", to set the unit.
Once set, these parameter values will be "remembered" by the YF2 unit until they are changed again at
a later time. The current values of these parameters will be displayed on the lower right hand side
compartment of the YF2 Power Meter window, as seen in Figure 1 above. To change them, enter new
values by repeating this sequence. To start reading power level, click the "START REPORTING"
button. This will result in the flashing of the label Power Report in green background and the display
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