TM 11-5840-281-35/1
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
a.
a.
13
-------------------------------------
As last indicated, except:
On Control-Indicator C-6988/
LIN indicator lighted,
Master Control-Indicator
TPN-18 under test, observe
CIR indicator extin-
C-6988/TPN-18
condition of CIR and LIN
guished on Control-Indi-
indicators.
cator C-6988/TPN-18
ANT POL:LIN
under test.
b.
b.
On master Control-Indicator
None.
C-6988/TPN-18, place ANT
POL switch to CIR.
c.
c.
On Control-Indicator C-6988/
CIR indicator lighted,
TPN-18 under test, observe
LIN indicator extin-
condition of CIR and LIN
guished on Control-Indi-
indicators.
cator C-6988/TPN-18
under test.
d.
d.
On Control-Indicator C-6988/
None.
TPN-18 under test, observe a
weak radar return.
e.
e.
On master Control-Indicator
None.
C-6988/TPN-18, place ANT
POL switch to LIN.
f.
f.
On Control-Indicator C-6988/
LIN indicator lighted,
TPN-18 under test, observe
CIR indicator extin-
CIR indicator, LIN indicator,
guished, and weak radar
and weak radar return.
return increases slightly
when in linear polariza-
tion.
a.
a.
On Control-Indicator C-6988/
Width of large radar
TPN-18 under test, observe
returns decrease.
radar returns and place FTC
14
-------------------------------------
As last indicated ---------
switch on master Control-Indi-
cator C-6988/TPN-18 to ON.
b.
b.
On master Control-Indicator
Width of large radar
C-6988/TPN-18, place FTC
returns increase.
switch to OFF.
Observe type of presentation on crt
Master Control-Indicator
in both Control-Indicator C-
C-6988/TPN-18 has beta
6988/TPN-18 and presence of
scan. Slave Control-Indi-
radar and iff video.
cator C-6988/TPN-18 has
15
-------------------------------------
As last indicated, except:
ppi scan. Beta scan has
NOTE. Iff video will be present
Master Control-lndicator
radar video only. Ppi
only when Interrogator Set AN/
C-C98/TPN-18
scan has radar video and
TPX-44 is operated with Radar
and
iff video (when available).
Set AN/TPN-18 and is providing
Pulse Generator
sync and azimuth antenna control.
-1 SS$/TPN-18
SCAN MODE: SIMULT
a.
None.
a.
On associated iff equipment (if
IF GAIN-EL: Fully cw
used), ensure that IFF AN-
EL TARGET: Fully ccw
TENNA switch on Electrical
Equipment Cabinet CY-4922/
TPX is placed to ON and IFF
16 -------------------------------------
As last indicated, except:
ANT SCAN CONT switch is
Both Pulse Generators
placed to RADAR.
1O-SIS/TPN- 8
b.
Observe type of presentation on
SCAN MODE: $ORM
b.
Beta scan is scanning on
both Control-Indicators C-
RANGE MILES: 40
both Control-Indicators
6988/TPN-18. Note presence of
C-6988/TPN-18. Radar
radar video and absence of iff
video only is present.
video.
c.
On slave Pulse Generator O-
c.
Beta scan on master
1333/TPN-18, place SCAN
Control-Indicator C-
MODE switch to IFF and ob-
6988/TPN-18. Ppi scan
serve type of presentation on
on slave Control-Indicator
both Control-Indicators C-
C-6988/TPN-18. When
6988/TPN-18.
used with associated iff
4-39
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