TTI TCB-550 - Page 16

Step Test Item UUT setting Equipment setting
Alignment
point
Spec.
4
FM
Deviation
Adjustment
Channel: CH19
Function:
1) FM mode
2) CB
Unit: TX condition
(PTT on)
Others: Don’t care
Connect the equipment and
UUT as shown on Figure.3
Audio generator
1) Set to 1KHz / 50mV
2) Input to MIC
Adjustment:
1) Adjust RV3 to obtain
1.8KHz deviation
RV3
1.8KHz
5
TX
Signal
Meter
of the UUT
Adjustment
Band Mode : F Band
Channel: CH19
Function:
1) FM mode
2) CB
Unit: TX condition
(PTT on)
Others: Don’t care
Connect the equipment and
UUT as shown on Figure.2
AM:1W , FM:4W
Adjustment:
1. AM mode : 1 W
2. FM mode : 4 W
Should
display
.AM mode :
1W
TX - Bar
.FM mode :
4W
TX - Bar
6
Half harmonic
of the UUT
Adjustment
Channel: CH19 Connect the equipment and
UUT as shown on Figure.4
Spectrum
1) Reference Level 35dB
2) Span 50KHz
Function:
1) AM mode
2) CB
Unit: TX condition
(PTT on)
Others: Don’t care
Adjustment:
1) Carrier Level (by spectrum)
Center Frequency : 27.185MHz
Spec : 33 ~ 35dBm
2) Half Harmonic (by spectrum)
Center Frequency : 39.5925MHz
Spec : < -100 dBm
LT1
LT2
< -100dBm
7
2
nd
Harmonic
of the UUT
Adjustment
Channel: CH19 Connect the equipment and
Function:
1) AM mode
UUT as shown on Figure.4
Spectrum
2) CB
1) Reference Level 35dB
2) Span 50KHz
Unit: TX condition LT11
(PTT on)
Adjustment:
LT12
< -86dBm
Others: Don’t care LT13
1) Carrier Level (by spectrum)
LT14
Center Frequency : 27.185MHz
Spec : 33 ~ 35dBm
2) 2nd Harmonic (by spectrum)
Center Frequency : 54.37 MHz
Spec : < -86 dBm