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TABLE 3-1.
MODULATION/FUNCTION AVAILABILITY
•
The Mod Out connector provides external access to the
composite modulation signals. Output impedance is 600
ohms.
Note: All modulation sources are available at Mod Out
jack while in use as generator modulation. Code Synthe-
sizer Level control simultaneously sets both the output
level and the modulation level.
Mo •
,
RF SECTION
'-
the keypad to select any frequency of the generator
from 10 KHz to 1,000 MHz in 100 Hz increments. The
output range at the antenna port and the transceiver
port provides sufficient amplitude to get through mis-
aligned tuners and receivers.
It
is especially effective to
change a receiver's frequency.
----./
RF'LP,,;,j
Erl
\V~llmme'
SU;'p
Vanable
FIGURE 3-11. RF SECTION
•
RF LEVEL
In the RF SECTION of the front panel (figure 3-11) a
push-pull switch associated with the Variable level con-
trol selects either the antenna port or the transceiver
port. The out-position (Pull) selects the antenna port.
Control the output over a 16 dB range with the Variable
RF Level control and the attenuation with the 14 Step
attenuator at 10 dB per step. Use the attenuator to ex-
tend the range to the maximum antenna input level of
+ 10 dBm.
Available in FM, AM, or SSB
FUNCTION only in
Generate
position.
Same as Tone A.
°Tone Seq
°Tone Remote
•
EXTERNAL LEVEL
External Modulation Inputs from a microphone
(Motorola RTM-4000B) plugged into the front panel
and a signal applied to the Ext Mod In sum together to
provide a single external modulating signal. The
microphone input provides standard mobile radio pre-
emphasis,
clipping,
and
frequency
roll-off.
The
microphone push-to talk switch switches the system
from monitor to generate mode. Adjust the external in-
put sensitivity or impedance with the External Level
control, for analyses with external instruments. The Off
position turns off the composite external modulation
signal path.
0.61 uV
-111.4DBM
12.4PCT
DIST SINAD
-18.1 DB
-60
0
-4.74
DEV KHZ
+4.75
,-----.
-100
0
+
100
FIGURE 3-12.
GENERATE MODE METERING DISPLAY
TABLE 3-2.
RF OUTPUT LEVEL AT ANTENNA PORT
•
RF OUTPUT LEVEL
Table 3-2 shows RF output levels available at the anten-
na port. At the in-position (Push) transceiver port (RF
In/Out) the output level is attenuated by a nominal 30
dB below the level at the antenna port.
0.1 uV to 0.4 V
OISPLAV
_
C"n MooMIr
. • Modulnhon
e
Speci A,ni1IVI.t~,
OuplC'k Ceo
RF Memory
•
Stg"i1lmg Scq
•
F(eq Couniel
•
OVM DIST
8
E .. I Waltmtl'ler
•
IF
' "
SCOUt' AC
•
Scope DC
1111
FIGURE 3-10. DISPLAY MODES
3.4 DlSPLAY SECTION
To select one of the twelve DISPLAY modes shown in
figure 3-10, press an arrow key located under the DIS-
PLAY list to activate up or down movement of the adja-
cent LED indicator. If a DISPLAY mode is located at
the top or bottom of the list when a key is pressed, the
DISPLAY mode will wrap around. Confirm the
selected configuration by the appropriate display on the
CRT.
•
GENERATE/MONITOR METERING
•
GENERATE
In Generate FUNCTION the Analyzer generates an RF
signal at a controllable output level useful for receiver
testing. Many forms of internal and external modula-
tion can be simultaneously impressed on the carrier fre-
quency to generate composite signals for servicing. Use
3-4
FUNCTION
FM and CW
AM
GENERATEFM
PL) 150.0
VOLTS RMS
0.1 uV to 1 V
RF LEVEL
DBM
-127 to + 13
-127 to +5
- - ) 154.1250 MHZ
DPL) ---
'-.....-/
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