Generate Mode; Rf Bus Control; Mod Control; Receiver Control - Motorola R-20010 Maintenance Manual

Table 2-2. RF BUS Control
HIT CONWDI CONWD2
0
I
2
:I
4
!\
MOD CONTA MOD
X2/XI
fi
MOD CONTB
BWCONT
;
-N MSB ..,- NMSB
X
t
t
!I
10
24 MHz fiOM Hz
II
LOOP LOOP
12 CONTROL CONTROL
1:1
t
!
I ~
1.-.
In
~
I.SB
-'- NLSB
li ~· A
MSB
-'- A MSB
1 8 I
Js •
I
!I
:!0
21
22
:!:I ..,.A
LSI:!
· N ot ~: Functions with bar over top are active low.
Hits
(1 .
i
uf CONWD4 are RF' Synthesizer control bits.
Hit,..ll·2:! uf CONWD4 are Re.:eiver control bits.
Table 2-3. MOD Control
A H
c
l:lW CONT Functilln
()
II
()
0
SWEEP
n
I I
0
NARROW MOD
I II I
0
WIDE MOD
I I
I
I
MOD INHIBIT
T able 2-4. Receiver Control
IW R l H2 R8 IH3
Rl 4 Rl ii Function
II I I I
0
1
I
AMWB
II
I I
0 0
I 1
AM NB
n
I I I
I I 0
CW/SSBWB
()
I I
(I
I I
0
CW/SSB NB
n
I I
I
I 0 I
FMWB
II
I 0 0 1
0 I
FM NB
II II
X X
I
1 I
WBDET
Ta hle 2-5. Duplex Control
S \\' 1
S\\':!
Function
II
II
0· 10 MHz
II
4ii MHz
I
OFF'
CONWD3
CONW0 4•
CONWD5
0.5· 1 GHz EN
GHz LOOP SENSE
VCO SELECT
:JOO.:J!'iO CLAM P
:l!'iO-!'iOO MHz. EN
MOD SENS E 0.01-250 MHz EN SWI
MOD CONT C 2.50-:lliO MHz EN SW2
-'- N MSB WBAMPHI/ LO -i-N MSB
t
RO
AM/FM/CW CRT EN
t
Rl WBDETEN
~ 10-440 MHz R2 NBF'M GA IN X 10 DUPLEX
LOOP R:l SPA RE GENERATOR
CONTROL R4 SPA RE CONTROL
!
R!i SPKR EN
!
R6 BIT1 2
Ri DEMODI NV
.;- N LSB
R8
WB/NB ..,. N LSB
..,- AMSB
R9 LPFL:IOO - AMSB
I
RI O LPFL 3K
1
Rl l HPFL 3K
Rl 2 HPF'L 300
Rl :l AM EN
Rl4 F'M EN
.;- A LSB
Rt:i SSB EN
.,. A LSB
Table 2-6. Receiver Filters
2-3
Low-Pass High-Pass
R9 R10
FREQ
R6
Rll
Rl2
FREQ
0 1
300Hz
0 1
I 5 Hz
1
0 3 kHz I
1
0 300 Hz
1 I 20kHz 1
0 0
3kHz
2.3
GENERATE MODE
2.3.1 DESCRIPTION
The generate mode provides a variable-level RF
output that is phase-locked
to
the internal 10-MHz
standard. AM, FM, and sideband modulation is pos-
sible on the output signal.
A block diagram of the generate mode is shown at
the end of the section in Figure 2-3.