Wavetek 3000 - OPTION 1 B RF LEVEL PROGRAMMING; General Information for Option 1 B; Option 1 B Operating Instructions

GENERAL INFORMATION
This factory-installed option requires
the addition of a Programmable
Attenuator
and M42 AttenuatorDrive
module to the
standard signalgenerator,
and provides
remoteprogramming of the
RF
level via
the rear-panel input
connector using
8-4-2-1 BCD contact
closures or TTL signals . The level
_programming rangecovers 0 to 90
dB
in 10
dB
steps . The O dB
referencepoint
is
set to the desired level by
the
instrument front-panel attenuators .
Remote selection of CW or AM mode is
also provided by a switch-contact
closure or a TTL signal .
Reverse-power
protection is also
providedby
this option to prevent
damage to
the instrument if DC (100 V
max) or
RF
(50
W max) voltages are
inadvertently
applied to the instrument
RF OUT connector
.
NOTE
DC protection is not included on
Model 3002 .
Due to the slight
"insertion
loss" and
change 'in
flatness causedby
addition
of the Programmable
Attenuator
to the
instrument,
it willnot be
possible to
obtain +13
dBm. output at
all
frequencies, therefore,
the
maximum
calibrated output
is +12 dBm
when
Option 1B is installed
.
OPERATING INSTRUCTIONS
Front-Panel
Operation
REMOTE PROGRAMMING
OPTION 1B
RF LEVEL PROGRAMMING
Table 8/1B-1
lists . instrument
specifications which
are additions to
or deviationsfrom
the specifications
given in Section 1 of
the instrument
instruction manual .
Refer to Figure 8/1B-2 for location
of
added
components .
Front-panel
operationremainsbasically
the same as for
a standard instrument,
except that the
maximum calibrated
output is +12 dBm .
However, any
external RF level programming
must be
removed or the front-panel
indicated
outputlevel will be incorrect .
Also,
the external CW/AMprogramming
must be
set to AM in order for the
front-panel
MODE switch to function properly
.
Six
wires are required to
connect the
remote
programming switches
or TTL
signals
to the rear-panel PROGRAMMING
plug (see
Figure 8/1B-1) : four
are
used for
level programming, one
for
mode
selection (CW or AM), and
one is
common
(ground) .

8-4-2-1 BCD
switch
closures
or TTL signals are
used to
select
the attenuator 10 dB steps
over
a range of 0
to
90
dB as shown in Table
8/1B-2 .
After the programming
switches have been
connected to the rear-panel
PROGRAMMING
plug, the 0 dB reference
point is set
to the desiredvalueby the
front-panel
attenuators ; then, the 10 dB steps are