TM 11-6625-2398-15-3
Step
Test equipment
Equipment under
Test
Performance
No.
control setting
test control settings
procedure
standard
POWER: OFF
zero set the OUTPUT VOLTS
(down)
meter.
OUTPUT VOLTS:
zero set
d. SG-340/G
POWER: ON
adjust the OUTPUT LEVEL control
Attenuator: 0db
knob for an OUTPUT VOLTS
OUTPUT VOLTS:
meter indication at the SET LEVEL
SET LEVEL
(+4DBM) mark.
Note: Check that OUTPUT
VOLTS meter indication .is exactly
on the SET LEVEL mark with the
attenuator set to 0dB (outer scale).
Readjust the OUTPUT LEVEL con-
trol knob if required.
2
SG-340/G
None
Adjust the MOD. LEVEL control
Function Switch:
for a reading of 50 on the PER-
1000
CENT MODULATION meter. Ad-
PERCENT
just the standing wave ratio indi-
MODULATION: 50
cator VERNIER GAIN control and
MOD. UP NORMAL
RANGE switch for an exact meter
DOWN:
reading (e.g. .5 on the EXPANDED
NORMAL
DB meter scale). Record the meter
AN UPM-108A
reading.
METER SCALE:
EXPAND
RANGE
As required for meter reading
3
Controls remain as at end of step 2.
a. Disconnect the hybrid attenuator
under test and connect the variable
attenuator, as shown by broken
lines, figure 8-3.
b. Adjust the variable attenuator
Insertion loss on the
ATTENUATOR DB control for the
ATTENUATOR DB
same standing wave indicator meter
control of the variable
reading recorded in step 2 above.
attenuator must
indicate 6.51.5.
Note. Correct the
hybrid attenuator
calibration tag
marking for 1090MHz, if
incorrect.
4
SG-340/G
None
a. Reconnect the hybrid attenuator,
MEGACYCLES:
solid lines figure 18-3.
1030
Balance of controls
Insertion loss on the
remain as at end of
MEGACYCLES dial to 1030 with
ATTENUATOR DB
step 2.
the frequency control knob and re-
control Of the vari-
peat steps 2 and 3.
able attenuator must
indicate. 6.51.5.
Note. Correct the
hybrid attenuator
calibration tag marking
for 1030MHz.
if incorrect.
8-12
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