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Page Title:
Table 4. Oscillator Panel 1A1 OUTPUT 2 Frequencies |
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  Table 4. Oscillator Panel 1A1 OUTPUT 2 Frequencies
(1A1) panel and tilt panel to vertical position.
Unit under test
Frequency counter indication
(4) Remove oscillator holddown cover plate
(Hz)
to expose oscillators and adjustments.
FREQUENCY
IN MHZ 2
Oscillator switch
Minimum
Maximum
(5) Rotate the frequency adjustment of each
position
oscillator to obtain indications within the limits specified
A1
1.000
999,995
1,000,005
in tables 3, 4, 5, and 6.
A2
1.400
1,399,993
1,400,007
NOTE
A3
1.500
1,499,992
1,500,008
To permit access to the frequency
A4
1.600
1,599,992
1,600,008
calibration adjustment of oscillators
AS
1.700
1,699,991
1,700,009
A1 through A11 use extender card
A6
1.800
1,799,991
1,800,009
assembly (table 1B).
A7
1.900
1,899,990
1,900,010
(6) Reinstall oscillator holddown cover plate.
AS
2.100
27099,989
2,100,011
(7) Release slide latches and position
A9
2.200
2,199,989
2,200,011
oscillator (1A1) panel into cabinet. Secure panel to cab-
inet frame with holding screws.
A10
148.750
148,747,025
148,752,975
A33
92.50
92,498,150
92,501,850
9.
Frequency Doubler 1A2AR3 Calibration
Table 5. Oscillator Panel 1A1 OUTPUT 3 Frequencies
Unit under test
Frequency counter
a. Performance Check.
indication (Hz)
(1) Connect N to BNC adapter to vhf signal
FREQUENCY
generator RF OUTPUT.
IN MHZ 3
(2) Connect RF OUTPUT connector of vhf
Oscillator switch position Minimum
Maximum
signal generator to unit under test 2F INPUT connector
A11
1.750
1,749,991
1,750,009
of matrix test panel (1A2) using RF cable W118.
A12
2.900
2,999,985
2,900,015
(3) Connect 2F OUTPUT terminal of matrix
A13
13.000
12,999,935
13,000,035
test panel (1A2) to D INPUT connector terminal of
A14
14.000
13,999,930
14,000,070
frequency counter using RF cable W119.
A15
16.000
15,999,820
16,000,080
(4) Insure that power supply panel (1A3)
A16
22.000
21,999,890
22,000,110
MAINS switch is set to ON.
A17
23.000
22,999,885
23,000,115
(5) Set vhf signal generator for an output of
86 MHz at a level of 100 millivolts.
A18
29.050
29,049,855
29,050,145
(6) Observe that the frequency counter
A19
30.000
29,999,850
30,000,150
indicates between 171 and 173 MHz.
A20
34.000
33,999,320
34,000,680
(7) Remove cables from unit under test.
A21
138.000
137,997,240 138,002,760
b. Adjustments.
Table 6. Oscillator Panel 1A1 OUTPUT 4 Frequencies
(1) Loosen captive screws securing matrix/
Unit under test
Frequency counter
test indicator panel (1A2) to cabinet frame and open.
indication (Hz)
(2) Locate the frequency doubler adjustment
FREQUENCY
cap (opposite 2F INPUT OUTPUT connectors on front
IN
panel) and remove.
MHZ 4
(3) Adjust frequency doubler trim capacitor
Oscillator switch position Minimum
Maximum
C5 until frequency counter indicates between 171 and
A34
2.000
1,999,990
2,000,010
173 MHz.
A35
4.750
4,749,976
4,750,024
(4) Replace frequency doubler adjustment
A36
15.000
14,999,925
15,000,075
cap. Do not secure matrix test panel (1A2) to cabinet
A37
17.000
16,999,915
17,000,085
frame until the procedures in paragraph 10 have been
completed.
A38
18.000
17,999,910
18,000,090
A39
19.000
18,999,905
19,000,095
10.
Vhf Amplifier 1A2AR2 Calibration
A40
20.000
19,999,900
20,000,100
a. Performance Check.
A41
21.000
20,999,895
21,000,105
(1) Interconnect unit under
test and
A42
144.250
144,247,115 144,252,885
calibration equipment as shown in
A43
156.750
156,746,856 156,753,135
CONNECTION A.
b. Adjustments
(1) Remove holding screws securing oscillator panel ( 1A1 )
to unit under test cabinet f came.
(2) Pull out panel until it locks in open position.
(3) Release the two slide latches on oscillator
5
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