Amps/Tdma 800 Mhz Front End; Tdma 1900 Mhz Front End - Nokia RH-41 Series Technical Documentation Manual

RH-41
System Module
ITEM
Gain relative accuracy in receiving band **
Gain absolute accuracy in receiving band **
* referenced to the sensitivity level
** After production alignment

AMPS/TDMA 800 MHz Front End

Typical values.
Parameter
Diplexer input loss
Duplexer input loss
LNA gain: High gain mode
Low gain mode
LNA noise figure*
LNA 3rd order intercept (IIP3)*
Bandfilter input loss
Mixer gain*
Mixer NF*
Mixer IIP3*
Total:
Gain
Noise Figure
3rd order intercept (IIP3)
*see Taco spec/measurements

TDMA 1900 MHz Front End

TDMA 1900 LNA is discrete. It uses integrated Bias control block, which is inside Taco. In
the normal high-gain operation mode, the bias voltage 2.78V is connected onto the col-
lector and the sink type constant current source is connected onto the emitter. The bias
current source is adjustable from 0.5 mA to 7.5 mA with 0.5 mA step. The base is biased
from 2.78V voltage via resistor.
When LNA AGC step is enabled, LNA is in low gain operation mode. Voltage and current
bias sources and direction of current are switched on the contrary. In this operation
mode the LNA has good linearity, still low noise figure and about -3 dB gain.
During TX slot LNA is in power-down mode, which is executed by switching the bias cur-
rent source to 0 mA.
Page 46
Nokia Corporation
CCS Technical Documentation
NMP Requirement
2
4
MIN TYP
0.35 0.4
2.5 3
16 16.5
-4.5 -4
1.4 1.7
-4 -3
1.5 2
6 7.5
8 9
4 4.5
18.2 18.6
4.6 5.5
-8.9 -7.5
Confidential
MAX Unit/Notes
0.45 dB
4.1 dB
17.3 dB
-3.8 dB
2.3 dB
-1.5 dBm
2.5 dB
8 dB
10.5 dB
5 dBm
20 dB
7 dB
-6.8 dBm
Issue 2 09/2003