TM 11-6625-3053-14
STEP
OPERATION
NORMAL INDICATION
CORRECTIVE ACTION
7
Rotate ATTENUATOR probe
(cont'd)
from ground stub vertical posi-
tion to attain this, if necessary.
Once +10 dBm attained, tighten
set screws holding attenuator
probe to drive yoke.
If +10 dBm cannot be attained go
to T/S item 14.
Set MODULATION to RF OFF.
Remove 10 dB atten pad from set
up.
Set MODULATION to CW.
Rotate ATTENUATOR control
counterclockwise until "0" dBm is
measured on ext power meter.
Check if ATTENUATOR dial
reads "0" behind the hairline. If it
does, the ATTENUATOR dial is
calibrated. If not, continue.
With the sig gen running, loosen
the 2 ea 6-32 spline set screws on
the hub of the ATTENUATOR
dial.
Slip the ATTENUATOR dial until
the "0" registers against the
hairline.
Tighten the 2 set screws.
Reverify that the POWER MON-
ITOR meter reads "0" or SET, and
the ATTENUATOR dial reads "0"
at the same time the ext power
meter reads 0 dBm.
The Attenuator dial is now
calibrated.
6-43