
TB9100 Reciter Service Manual
RF Circuitry
97
© Tait Electronics Limited January 2006
Figure 6.5
Reciter Exciter Synthesizer Modulator Block Diagram - B and H Bands
ADC
ADC
DA
C
DA
C
Delay
Delay
FM
Demodulator
VcoMod
Digitised
Tx
Audio
IntGain
DSP based FCL Processor
VcxoScale
TripleScale
TripleScale
PresT
riDemod
FclF
reqOffset (DC v
alue)
FclMidP
oint
(DC v
alue)
Integr
ator
VcxoScale
Q Channel
I Channel
/4
/R
/N
Divide by 4
LPF
LPF
FCL_I
FCL_Q
I-Q Exclusive OR Gate
Twisted Ring Counter
Digital Clock
Buffer
Digital Clock
Buffer
12.8MHz FCL
VCXO Oscillator
12.8MHz
Reference
Oscillator
VCXO Modulation
+ DC Offset
Exciter
VCO
Progr
ammable
Reference Divider
Progr
ammable
VCO Divider
Digital Clock
Buffer
Phase
Detector
Charge
Pump
f
ref
f
VCOfb
Softw
are
Register
VCO F
eedback
Attenuator
Exciter Control
Circuit
64/65
Prescaler
Frequency Synthesizer IC
Loop
Filter
Varicap
Diodes
VCO
LNA
Buffer
Harmonic
Filter
Fixed Slope
Attenuator
Final
Driver
Fixed
Attenuator
+11dBm
to P
A
Ex_K
ey
PA_K
ey
FCL_VCXO_CTRL
SYN_VCO_MOD
Frequency Control Loop
Clock
Data
Chip Select/Latch Enable
Serial Bus
Lock Detect
Output
Lock Detect
Circuitry
Summary of Contents for TB9100
Page 1: ...TB9100 base station Reciter Service Manual MBA 00017 01 Issue 1 January 2006...
Page 12: ...12 TB9100 Reciter Service Manual Tait Electronics Limited January 2006...
Page 32: ...32 Reference Switch TB9100 Reciter Service Manual Tait Electronics Limited January 2006...
Page 86: ...86 Network Circuitry TB9100 Reciter Service Manual Tait Electronics Limited January 2006...