Codan 2110 series, Repair Manual

Page: 76 / 164

Functional description of PCBs
44 Manpack Transceiver 2110 series Repair Guide
Antenna Tuner PCB
The Antenna Tuner PCB performs the following functions:
• detects VSWR
• detects phases
• provides scanning amplification of Rx signal
• matches the antenna
• stores the last-tune settings in memory
• microcontrols tuning
The Antenna Tuner PCB contains:
• a PIC microcontroller (IC5)
• an EEPROM (IC7)
• a load-matching circuit
08-06063-001
When ordering a replacement PCB, use the information in the listed spares drawing to
select the correct assembly (see
page 25, Interconnection diagrams and listed spares
drawings ).
For details on the Antenna Tuner PCB,
Codan part number See...
08-06063-001 Table 11 on page 45 and
Figure 14 on page 32
CAUTION
If this PCB is replaced, ensure that IC5 has the same (or later) firmware
version as the original.
NOTE
All input signals for measuring Tx voltages are –10 dBv two-tone signals
from the 0208 test set (or equivalent), unless stated otherwise. This signal
level provides maximum ALC and therefore maximum output power for
taking the measurement.
NOTE
All input signals for measuring Rx voltages are –10 dBm from the RF
signal generator at ±1 kHz from SCF.