Wavetek 3000 - Page 80

MAINTENANCE
willbe
10 .000 MHz with the
kHz FREQUENCY
switches set
to 000 kHz, andthe
frequency
willdecrease
to
9
.001 MHz with the
kHz
switches
set to 999 kHz . If the
signal
level is
as specified in Table 5-2,
module M31 is
operating properly .
If output of
each of theabovemodules
is correct, moduleM34
or an RF cable
TTL LOGIC LEVEL
is defective
.
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A further check
of the
M34 can be
made by monitoringM34
pin 8
with a digital
voltmeterwhile
stepping
through the
frequency range
from
10
MHz
to 520 MHz in 10
MHz steps .
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The
volt-
meterreading
should be 0 t3 V ;
however,
a defective M34
may give avoltage
read-
ing of 12 to 16
volts .
2 V
P-P
Min .
PHASE-LOCKED
LOOP MODULE
TABLE 5-2 . MODULE
SIGNAL
INPUT-SIGNAL
FREQUENCY -
LEVELS
INPUT-SIGNAL
LEVEL
SIG . MEASURED
AT
1 M31
1 kHz
TTL
M30 (W13)
2 M32 1 MHz
TTL
M30
(W12)
1440
MHz -12 to
-15 dBm M30 (W9)
3
M33 1198 MHz
-10
dBm
±3
dB M9W (W5)
1200 MHz (120
comb) -15 dBm ±5
dB
M30 (Win)
1 .5 to 2 .5
MHz 1 volt p-p M29-1(W7)
2 MHz
TTL
M30 (W11)
4
M34 1198 to 1718
MHz -10 dBm ±5
dB M9W (W4)
1448 to 1487
MHz -2 dBm ±3 dB
M32 (W8)
40 to 280 MHz (40
comb) -10 dBm ±3 dB
M30 (W6)
10 to 9 .001
MHz TTL
M31 (W14)
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