User Guide

PAMS
Technical Documentation
NME–3
Technical Information
Page 20
Issue 1 10/99
Handset Audio Path
Sending (SLR=8dB)
8kHz
13 bit
parallel
Serial Interface
5th order
3kHz
elyptic
lowpass filter
0dB @ 1kHz
anti–aliasing
prefilter
0dB
2nd order
300Hz
highpass
filter
0dB @
1KHz
13 bit ADC
6,14 dBm0
@ 0dBV
//
nom: –16dBm0
max: +3,14dBm0
nom: 78mV
max: 707mV
nom: 1.95mV
max: 17.68mV
DSP
0dB @ 1kHz
Networklevel after DSP
correction:
nom: –16dBm0
max: +3,14dBm0
nom: 78mV
max: 707mV
29dB
Fix20dB+
VAR9dB
20–42,5 dB
in 1,5dB steps
nom: 87mV
max: 790mV
HSMICP
HSMICN
31dB
EMC Filtering
–11,3dBm0/Pa @ 1kHz from MRP to Network
Mic+Boot
Mic:
–41,7dBV/Pa
@ 1cm @ 1kHz
Vbias
2.2V
nom: 2.37mV
max: 21.5mV
nom: 3.28mV
max: 30,0mV
nom: 87mV
max: 790mV
nom: –4,7dBPa
max: 14,3dBPa
MRP
Phone Unit
Handset
7m cable
– dB
EMC Filtering
0dB
EMC Filtering
0dB
HSMICP
HSMICN
–2.8 dB
–33 dB
nom: 1.95mV
max: 17.68mV
Mic2
Cobba
Figure 8. Audio Path – Hand–Set
Receiving (RLR=2dB)
8kHz
13 bit
parallel
Serial Interface
5th order
3kHz
elyptic
lowpass filter
0dB @ 1kHz
13 bit DAC
–7,07 dBVrms
@ 0dBm0
//
nom: –16dBm0
max: +3dBm0
nom: 70,2mV
max: 636mV
nom: 14mV
max: 401mV
DSP
0dB @
1kHz
Networklevel after
DSP correction:
nom: –16dBm0
max: +3,14dB
m0
nom: 70,2mV
max: 636mV
EARP
6,5dBPa/0dBm0 from Network to ERP (nominal)
nom: –9,5dBPa
max: 19,5dBPa
ERP
Phone Unit
Handset
Gain is adjustable from
0 to –30dB in 2dB steps.
Sorftware is set up to provide 10
volume steps.
– 6dB
– 8dB
–10dB
–12dB
–14dB
–16dB
–18dB
–20dB
–22dB
–24dB
12.1dB
6dB gain
increase
done
EMC Filtering
Earp
24dB
Pa/V
@
1kHz
nom: 17.7mV
max: 506mV
nom: 70.5mV
max: 2030mV
nom: 17.5mV
max: 501 mV
19,5dBPa@3,14dBm0 (maximal)
EARN
HSEARP
HSEARN
EMC Filtering
–__dB
EMC Filtering
–__dB
+6dB
nom: 28mV
max: 802mV
–4 dB
–12dB
EARP/EARN
Cobba
–18dB (nom)
– 6dB (max)
8KHz
8KHz