參數(shù)資料
型號： KS8701
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： FLEXTM Roaming Decoder II
中文描述： FLEXTM漫游解碼器二
文件頁數(shù)： 57/73頁
文件大?。?/td> 434K
代理商： KS8701
Appendix A: Application Notes
KS8701
56
FLEX
TM
Roaming Decoder II
Figure 11: Automatic Receiver Warm Up Sequence
HOST INITIATED RECEIVER WARM UP SEQUENCE
The host can cause the KS8701 to warm-up the receiver in three ways: (1) by turning on KS8701 by setting
the
ON
bit in the control packet; (2) by requesting a noise detect by setting the
SND
bit in the roaming control
packet; or (3) by requesting an A-word search by setting the
SAS
bit in the roaming control packet. When the
KS8701 warms up the receiver in response to a host request, the first warm up setting, if enabled, is applied to the
receiver control lines for the amount of time programmed for that setting. Each subsequent warm up setting is
applied to the receiver control lines for their corresponding time until a disabled warm up setting is found. Once a
disabled warm up setting is found, the
“
3200sps Sync Setting
”
(for
ON
and
SND
warm ups) or the
“
1600sps Sync
Setting
”
(for
SAS
warm ups) is applied to the receiver control lines and the decoder does not expect valid signal
until after the
“
3200sps Sync Warm Up Time
”
(for
ON
,
SND
, and
SAS
warm ups) has expired. In figure 12 on
page 56 the receiver warm up sequence when the host initiates a warm-up sequence and when all warm up
settings are enabled is shown.
Figure 12: Host Initiated Receiver Warm Up Sequence
Warm Up
Off Time
Warm up
Time 2
Warm up
Time 3
Warm up
Time 1
Warm up
Time 4
Warm up
Time 5
Warm Up
setting 5
Warm Up
setting 4
Warm Up
setting 3
Warm Up
setting 2
Warm Up
setting 1
Off
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
160ms
EXTS1 & EXTS0
signals are
expected to be
valid here.
1600sps or 3200sps
sync setting
RECEIVER
CONTROL
LINE SETTING
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
EXTS1 & EXTS0
signals are
expected to be
valid here.
3200sps
sync setting
RECEIVER
CONTROL
LINE SETTING
Warm up
Time 5
Warm up
Time 4
Warm up
Time 3
Warm up
Time 2
Warm up
Time 1
Warm Up
setting 5
Warm Up
setting 4
Warm Up
setting 3
Warm Up
setting 2
Warm Up
setting 1
Off
3200sps
sync
Warm up
Time
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