User's Manual
PCS3_HD_v01.000-03
Confidential / Preliminary
Page 52 of 101
2013-10-21
PCS3 Hardware Interface Description
5 Antenna Interfaces
Configuration
Wakeup State
RING0
WAKEUP
AT^SCFG="URC/Ringline",
"local"
(P)
low (active) low (PD)
"asc0"
low (active) low (PD)
"off"
high
low (PD)
"wakeup"
high
high (active)
Configuration
Wakeup Active Time
for RING0, WAKEUP
AT^SCFG=
"URC/Ringline/ActiveTime",
"0"
4.6ms-9ms
"1"
(P)
100ms
"2"
1s
"keep"
keeps active until
1st time enter sleep mode
Pull down (appr. 100k)
iven high
driven
low dashed line:
lternative funtion
1)
(P) Power up default value
2)
If needed: During runtime the LCI feature has to be enabled by
AT^SCFG="MEopMode/PowerMgmt/LCI","enabled"
Figure 24: RING0 (ASC0), WAKEUP and LCI_IND startup behavior
4
Antenna Interfaces
The PCS3 only CDMA main Antenna, PCS3 didn’t have GPS fora GNSS receiver
5.1
CDMA Antenna Interface
The PCS3 CDMA antenna interface comprises a main CDMA antenna as well as an optional
CDMA Rx diversity antenna to improve signal reliability and quality
1
. The interface has an
impedance of 50
ohm PCS3 is capable of sustaining a total mismatch at the antenna interface
without any damage, even when transmitting at maximum RF power.
The external antenna must be matched properly to achieve best performance regarding
radiation power, modulation accuracy and harmonic suppression. Matching networks are not
included on the PCS3 PCB and should be placed in the host application, if the antenna does
not
have an impedance of 50ohm
Regarding the return loss PCS3 provides the following values in the active band:
Table 16: Return loss in the active band
State of module Return loss of module Recommended return loss of application
Receive > 8dB > 12dB
Transmit not applicable > 12dB
Idle < 5dB not applicable
1.
By delivery default the optional CDMA Rx diversity antenna is configured as available for the module. To
avoid negative side effects and performance degradation it is recommended to disable the diversity an-
tenna path if
- the host application does not support a diversity antenna
- the host application includes a diversity antenna - but a network simulator is used for development and
performance tests.
Please refer to [1] for details on how to configure antenna settings.