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3-5. Bias Voltage Adjustment
n
Perform "3-4. Low Voltage Limit Adjustment" before
performing this adjustment.
Equipment : Spectrum analyzer
Oscilloscope
Signal generator
DC regulated power supply
Coaxial cable with N-type connectors (2
pieces)
Connection
WLL-RX50 connector panel
IF
INPUT
OUTPUT
IF INPUT
IF OUTPUT
Coaxial cables with
N-type connectors
Signal generator
Preparations
. Connect the unit and equipment as shown in the connec-
tion diagram, and turn ON the power.
. Set the DC regulated power supply to 12.0 ± 0.1 V dc.
Adjustment Procedures
1. Main menu setting :
MENU : RF Center Freq.
Ch* (customer setting) → Ch 4 (2442
ITEM :
MHz)
n
Write down the customer setting.
3-4 (E)
DC-IN
DC-IN
DC regulated
power supply
Spectrum
analyzer
2. Setup the spectrum analyzer as shown in the following
table.
Setting item
Frequency
BW
Monitor
3. Setup the signal generator as follows checking the
spectrum analyzer.
Setting item
Frequency
Amplitude
0
A
(Spectrum analyzer)
4. Technical menu setting :
MENU :
D/A Level Adjust
SUB MENU :
Cafe-S Bias Adj
Cafe-S Bias Adj
(EL display)
Specifications
Center :
362 MHz
Span :
50 MHz
RBW :
1 MHz
VBW :
3 kHz
Div :
10 dBm
Ref level : 0 dBm
Specifications
362 MHz
A = _13.5 ± 0.5 dBm
**
WLL-RX50
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