TB 11-6625 -3263-25
Items Potentially Replaceable
Designator
LIN
NSN
Condition Code
8640B
NONE
NONE
E53
SG-1093/U
J54125
P1, E51
SG-1112(V)1/U
S48051
P1, E52
SG-1112(V)2/U
S48119
P1, E53
Condition Codes
Code
Condition
E51
This item is an HP 8640 which has a built in frequency counter from 20 Hz
to 550 MHz. The TEMOD item does not have this capability. Replace with
TEMOD item if counter is not required.
E52
This item is an HP 8640B w/opt 004 which is the avionics option. It also
has a built in frequency counter. The TEMOD item has neither of these
capabilities. If neither capability is required, replace with TEMOD item.
E53
This item is an HP 8640B w/opt 001 which is an internal variable audio
The TEMOD item has an internal modulation generator from 20 Hz to 100
kHz; it does not have frequency counting capabilities. Replace with
TEMOD item if frequency counter and audio oscillator from 20 Hz to 600
kHz is not required.
Item will not be removed from the field at this time; however, item is
P1
replaceable by TEMOD item. This item will be LCC B (if type classified)
and is technically suitable for retention against authorizations for the
standard TEMOD LCC A item. (i.e., Objective is to fill shortages with
suitable item pending availability of LCC A item.)
4-130