Rf Integration; Rf Connection - Sierra Wireless MC5725 Hardware Manual

3: RF Integration

Note: To disconnect the
antenna, make sure you use the
Hirose U.FL connector removal
tool (P/N UFL-LP-N-2(01)) to
prevent damage to the module
or coaxial cable assembly.
Rev 1.8.1 May.08
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
The MC87xx operates on the frequencies detailed in Table 3‐1.
Table 3-1: MC87xx — Supported frequencies
Product
MC8775 GSM 850
MC8775V
MC8780
MC8781
EGSM 900
MC8785V
MC8790
DCS 1800
PCS 1900
MC8775 Band I
MC8775V
UMTS 2100
MC8780
MC8781
MC8785V
MC8790
MC8775 Band II
MC8775V
UMTS 1900
MC8780
MC8781
Band V
MC8785V
UMTS 850
MC8790
MC8775V GPS
MC8780
MC8781
MC8785V
MC8790

RF connection

When attaching an antenna to the module:
• Use a Hirose U.FL connector (model
U.FL #CL331‐0471‐0‐10) to attach an antenna to a
connection point on the module, as shown in Figure 3‐1 (the
main RF connector on the top side; the diversity RF or GPS
connector on the bottom side).
• Match coaxial connections between the module and the
antenna to 50 Ω.
Proprietary and Confidential
Band Frequencies
(MHz)
Tx: 824–849
Rx: 869-894
Tx: 880-915
Rx: 925-960
Tx: 1710-1785
Rx: 1805-1880
Tx: 1850-1910
Rx: 1930-1990
Tx: 1920–1980
Rx: 2110–2170
Tx: 1850–1910
Rx: 1930–1990
Tx: 824–849
Rx: 869–894
Rx: 1575.42
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