IFR NAV-402AP-3 Operation Manual page 29

ITEM DESCRIPTIO N
5. FREQ UENCY MODE Switch
Selects fr equency band to be used:
Mar ker ( MKR) , VO R, Localizer (L O C) ,
G lide Slope (G /S) or COMM.
band except COM has two positions;
one with a fixed fr equency ( FIXED)
and the other
fr equency ( VAR) . The COM band has
thr ee positions;
fr equency ( FIXED)
var iable fr equencies ( CO M 25kHz and
CO M 8.33kHz) .
6. G /S DDM Contr ol
Selects amount
deviation of an ILS Indicator under
test. Calibr ations in DDM r epr esent
standar d deflection (.091) , full scale
( .175) and gr eater
deflections ( .400) . Clockwise r otation
pr ovides upwar d deflection.
The 90 ~ or 150 ~ position deletes the
opposite tone ( 150 or 90 Hz) and sets
the selected
150 Hz) to the same level as the on
cour se value ( 40%) for a flag test.
NOTE: Setting the LO C DDM Contr ol
to the same 90 ~ or 150 ~
position when using the G lide
Slope function deletes the
selected G lide Slope tone.
Setting the G /S DDM Contr ol to 90 ~
and the LO C DDM Contr ol to 150 ~ or
vice ver sa pr ovides continuous wave
( CW) oper ation.
The ↓ position allows the G /S VAR
DDM Contr ol
deviated deflection.
O P E R AT I O N M A N U A L
I FF - 7 0 1 T i
Each
with a var iable
one with a fixed
and two with
of G /S pointer
than full scale
tone ( 90 or
to set continuously
ITEM DESCRIPTIO N
7. CRYSTAL HI/LO Switch
Selects high ( HI) or low ( LO ) fixed
fr equencies in G /S FIXED or VO R
FIXED modes
FREQ UENCY
CRYSTAL HI/LO Switch also applies
modulation to
Localizer Tr ansmitter fr equency when
FREQ UENCY MODE Switch is set to
G /S FIXED.
Localizer Tr ansmitter fr equencies with
G /S fixed
AVG /PEAK LO C XMTR O N Switch is
set to PEAK LOC.
8. COUNTER MODE Switch
Selects signal sour ce to be counted
and shown on the DIG ITAL Display:
G G EN measur es and display
inter nal Signal G ener ator
fr equency.
G HZ ( 1 Hz r esolution) , kHZ ( 10 Hz
r esolution) , KHZ ( 100 Hz
r esolution) and MHZ ( 1 kHz
r esolution) measur es and displays
CO M Tr ansmitter fr equency
connected to CO M XMTR IN
Connector or exter nal signal
fr equency connected to MO D
IN/EXT FREQ CTR IN Connector .
G BRG measur es and displays digital
bear ing cir cuit output to ver ify
bear ing set by VO R BRG SELECT
Switches. In the BRG position,
the bear ing monitor cir cuits also
check VO R modulation for cor r ect
oper ation at 90 ° .
9. METER BEARING CENTER Adjust
Used to center the MO NITO R Meter
when the
FUNCTION Switch is set to BRG and
the COUNTER MODE Switch is set to
any position
METER BEARING
sets a r efer ence level in the inter nal
bear ing check oper ation.
as selected by the
MODE Switch. The
the appr opr iate
The Test Set pair s
fr equencies when
MO NITO R METER
except BRG . The
CENTER Adjust
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Page 5
Jul 1/00