HT9015

13

April 10, 2000

Preliminary

The SIG_OUT terminal generates combination states of RX and TX lock detectors. The RSSI and

NOISE detector are shown in figure 2 below.

SW1 and SW2 in Fig. 3 determine the output on SIG_OUT using selection bits in a control regis-

ter according to the figure below.

RX P L L

RX L D

TX L D

TX P L L

RS S I

L O C K D ET EC T O R

SW 1

LD O U T

DE T O U T

SI G_ O U T

IF A M P

SW 2

R S S I D E T

N D

NO I S E DE T E CT O R

AF O U T

RS S I

I n t e r nal

Ex t e r n a l

N _ R E C

N _F I L_O U T

N _ F I L_I N

Figure 3 Signal output block diagram

L D T X

L DRX

RS S I

ND

D e c i de S W 1

and LD O U T

D e c i de S W 2

and D E T O U T

L D T X

L D RX

RS S I

ND

1000

E x am pl e: T X l o c k det ec t o r oper at i o n

Figure 2 SIG_OUT bits