Motorola ASTRO Digital XTS 3000 Manual de serviço básico - Página 27

Procurar online ou descarregar pdf Manual de serviço básico para Rádio portátil Motorola ASTRO Digital XTS 3000. Motorola ASTRO Digital XTS 3000 48 páginas. Handheld radio
Também para Motorola ASTRO Digital XTS 3000: Manual do operador (12 páginas)

Imprimir página
Motorola ASTRO Digital XTS 3000 Manual de serviço básico
Transmit
Deviation
Balance
(Compensation)
Alignment
800MHz Power Level
3 Watts
F
5. Press
to dekey the radio.
H
6. Press
to program the value.
7. Repeat steps 3-6 for the remaining frequencies.
J
8. Press
once to return to the TRANSMITTER ALIGNMENT MENU, or
J
press
twice to return to the SERVICE MENU.
Compensation alignment balances the modulation sensitivity of the VCO and
reference modulation (synthesizer low-frequency port) lines. The
compensation algorithm is critical to the operation of signalling schemes that
have very-low-frequency components (for example, DPL) and could result in
distorted waveforms if improperly adjusted.
1. From the SERVICE MENU, press
ALIGNMENT MENU.
D
2. Press
to select the TRANSMIT DEVIATION BALANCE
(COMPENSATION) alignment screen. The screen will indicate the
transmit frequencies to be used. See Figure 6.
MOTOROLA Radio Service Software
ASTRO
Model: H09UCH9PW7AN
MAIN:SERVICE:TX ALIGN:BAL ATTN
Frequency
---------
806.000
815.000
824.000
851.000
860.000
869.000
0
MIN |---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---| MAX
F1
F2
HELP

Figure 6 Transmit Deviation Balance (Compensation) Alignment Screen

P
Z
3. Press
(or
the lowest frequency shown).
D
4. Press
. This will cause the radio to key and the radio's DSP IC to inject
an 80Hz tone into the RF board.
5. Measure the deviation and record this value.
D
6. Press
to dekey the radio.

Table 10 Transmit Power Setting

All Test Frequencies
B
to select the TRANSMITTER
Use UP/DOWN Arrows To Adjust Softpot.
TRANSMIT DEVIATION BALANCE (COMPENSATION)
-----------------------------------------
Current
Value
-------
30
30
30
45
45
45
Transmitter..Off
F3
F4
F5
F6
TOGGLE LOW
TOGGLE HIGH
TONE PTT
TONE PTT
or [RETURN]) to select a frequency field (starting with
3.2 - 3.4
New Softpot Value
-----------------
30
30
30
45
45
45
F7
F8
F9
PROGRAM
VALUE
63
F10
EXIT
17