User guide

UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 53 of 78
Both receiver outputs are B.T.L. type (Bridged Tie Load) and the OEM circuitry shall
be designed bridged to reduce the common mode noise typically generated on the
ground plane and to get the maximum power output from the device; however also a
single ended circuitry can be designed for particular OEM application needs.
10.2.2. Output Lines Characteristics
“Ear_MT” Differential output path
• line coupling DC
• line type differential
• output load resistance 32 Ω
• max. load capacitance 500pF(max.)
• differential output impedance 1 Ω (max) @1.02KHz
• signal bandwidth 150 - 4000 Hz @ -3 dB
• differential output voltage 1060mVrms
(typ.)@0dBm0
• SW volume level step 2dB
• number of SW volume steps 10
“Ear_HF” differential output path
• line coupling DC
• line type differential
• output load resistance 32 Ω
• max. load capacitance 500pF(max.)
• differential output impedance 1 Ω (max) @1.02KHz
• signal bandwidth 150 - 4000 Hz @ -3 dB
• differential output voltage 833 mVrms
(typ,)@0dBm0
• SW volume level step 2dB
• number of SW volume steps 10