FCC ID: K6630173X3D
IC ID: 511B-30173X3D
Alignment
4/5
Vertex Standard Co,. Ltd.
With the
PTT
switch pressed, adjust
VR1003
so that the maximum deviation is ±4.4
kHz.
Set the output of the audio generator (AG) to 100 Hz and 1 V.
With the
PTT
switch pressed, adjust
VR1004
so that the maximum deviation is ±4.4
kHz.
Adjustment of Receiver Front-end
Adjust the receiver front-end coil.
Setup the test equipment as shown below.
Set the center frequency of the spectrum analyzer to 159.00 MHz, set SPAN to 20.00
MHz, set RBW and VBW to 30 KHz, and set SWP to 56 ms.
Adjust L
1010
,
L1013
,
L1027
,
L1028
, and
L1031
until the wave form shown in below is
obtained.
Note
: Adjust the output of the tracking generator so that RF AMP and spectrum analyzer
will not saturate.
Figure shows the reference wave form. The wave form varies with measuring instruments.
It is impotent to take the lowest possible value at the stop band near 150 MHz and the
highest possible value at the band near 156 MHz.
Each coil shall be adjusted at the range between the initial condition and right and left
revolving.
GX1255S-FRONT-END
ATTEN 20dB
RL 10.0dBm
10dB/
CENTER 159.00 MHz
*RBW 30 kHz VBW 30 kHz
SPAN 20.00 MHz
SWP 56.0 ms
