Sierra Wireless HL7748 用户手册
41110555
Rev 1.0
September 21, 2017
35
Product Technical Specification
Detailed Interface Specifications
Refer to the following table for the pad description of the PWM interface.
Table 34.
PWM Pad Description
Pad Number
Signal Name
I/O
I/O Type
Description
58
PWM0
O
1.8V
PWM output
Refer to the following table for the electrical characteristics of the PWM interface.
Table 35.
PWM Electrical Characteristics (TBC)
Parameter
Conditions
Minimum
Typical
Maximum
Unit
V
OH
High impedance load
--
1.8
-
V
V
OL
-
-
-
0.2
V
I
PEAK
-
-
-
8
mA
Frequency
-
25.6
-
1625
kHz
Duty cycle
-
1
-
99
%
3.18. RF Interface
The RF interface of the AirPrime HL77xx modules allow the transmission of RF signals. This interface
has a 50
has a 50
Ω
nominal impedance.
3.18.1. RF Connection
A 50
Ω
(with maximum VSWR 1.1:1, and 0.5dB loss) RF track is recommended to be connected to
standard RF connectors such as SMA, UFL, etc. for antenna connection.
Refer to the following table for the pad description of the RF interface.
Table 36.
RF Pad Connection
Pad Number
RF Signal
Impedance
VSWR Rx (max)
VSWR Tx (max)
49
RF_MAIN
50
Ω
1.5:1
1.5:1
3.18.2. RF Performances
RF performances are compliant with 3GPP recommendation TS 36.101.
The following table shows typical RX sensitivity with the reference sensitivity level at 95% of the
maximum throughput, using the following 3GPP test conditions:
maximum throughput, using the following 3GPP test conditions:
•
3GPP Pattern
•
QPSK modulation
•
4RB_DL, 6RB_UL
•
23dBm UL power