3. TECHNICAL BRIEF
- 32 -
3.6.1 Baseband Transmit Section
1. The AD6537B Baseband Transmit Section is designed to support GMSK for both single-slot and
multi-slot application.
2. The transmit channel consists of a digital GMSK modulator, a matched pair of 10-bit DACs and a
matched pair of reconstruction filter.
3.6.2 Baseband Transmit Section
1. This section consists of two identical ADC channels that process baseband in-phase(I) and
quadrature(Q) input signals.
Active
CT Filter
GMSK
Modulator
PGA
Control
Serial
Port
Baseband
Serial
Port
Tx
DAC
CSFS
CSDI
CSDO
BSIFS
BSDI
SC
Filter
Active
CT Filter
PGA
SC
Filter
Tx
DAC
Active
CT Filter
SC
Filter
Ramp
DAC
Ramp
RAM
PGA
AD6537B
IP
IN
QP
QN
PA
Figure 3-12. AD6537B BASEBAND TRANSMIT SECTION
Digital
Filter
Baseband
Serial
Port
Rx
ADC
BSOFS
BSDO
SC
Filter
Digital
Filter
Rx
ADC
SC
Filter
AD6537B
IP
IN
QP
QN
Othello™
Figure 3-13. AD6537B BASEBAND RECEIVER SECTION
Summary of Contents for C3380
Page 1: ...Service Manual Model C3380 Date November 2005 Issue 1 0 Service Manual C3380 ...
Page 3: ... 4 ...
Page 83: ...4 TROUBLE SHOOTING 84 4 11 KEY backlight Trouble Test Points Figure 4 22 ...
Page 109: ...Note 110 ...
Page 116: ... 117 8 PCB LAYOUT ...
Page 117: ... 118 8 PCB LAYOUT ...
Page 125: ...10 STAND ALONE TEST 126 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 129: ... 130 ...
Page 131: ... 132 ...