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Page Title:
Set sweep oscillator controls as follows: |
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  Table 2-3. Lines 2,3, and 7 are superseded
TB 11-6625-2402-35/1, 8 May 1973, is
as follows:
changed as follows:
-300 V . . . . . . . . . . . . . . 9.5 K to10.5 K
The title is superseded as shown above.
+275V . . . . . . . . . . . . . . 28 K to 34 K
HELIX(10:1)/HELIX(1:1AC) . . . ZERO
Page 3, paragraph 1-2. In lines 7 and 8,
change address to read "Commander, US
Table 2-3. T h e f o l l o w i n g f o o t n o t e
Army TMDE Support Group, ATTN: DRXTM-
added: -
L P P , Redstone Arsenal t AL 35898."
*This indication applies to model 8690A
only.
A l s o see note following paragraph
Paragraph 1-3b, PL-1241A/USM-308(V)
2-2a(7) above.
(HP 8698B). Make the following changes in
t h e specifications:
Table 2-5. Delete "SWP REF AM +36 +40
- 4 " from table.
Frequency range . . . . . . . 4 to 11 MHz,
low band; 4
Paragraph 2-3a(2). In line 5, change "(1.
to 110 MHz,
4)" to read "(1-3)".
high band
Frequency accuracy . . . . . Low range:
Paragraph 2-3a(6) is superseded as follows:
±1% of
frequency
(6) Set sweep oscillator controls as
±50 kHz
follows:
High range:
(a) LINE switch to RF.
±1% of
( b ) START/CW pointer to 38V scribe
Frequency
line.
±500 kHz
(C) STOP/
F pointer to 73V scribe
Uncalibrated RF output
-15 dBm
line.
minimum
(d) SWEEP SELECTOR to CW.
( e ) AMPLITUDE MODE pushbutton.
Page 11. Paragraph 2-2a(7) is superseded as
all released.
follows:
(f) ACL pushbutton released.
(g) SWEEP TIME (SEC) control to .01-
( 7 ) Multimeter indication will be greater
.1.
than indication obtained in (4) above.
(h) VERNIER control to maximum
clockwise (line sync).
Add note after paragraph 2-2a(7) as
( i ) FUNCTION
pushbutton
follows:
START/STOP in (remaining 3 released).
NOTE
FUNCTION
(j) UUT
SELECTOR
T h i s circuit contains a diode. When
switch to SWP REF AM.
the diode is forward biased, the
a m o u n t of resistance measured will
Add paragraphs 2-3a(7), (8), and (9) as
depend on the sensitivity and range of
follows:
the meter being used.
(7) Voltmeter (1-2) will indicate between
+36 and +40 V dc.
Page 12, table 2-2. L i n e s 1, 2, and 3 are
(8) Set UUT SWEEP SELECTOR switch as
superseded as follows:
appropriate and FUNCTION SELECTOR
s w i t c h to positions listed in table 2-5 and
SWPREF AM . . . . . . . . . .
observe that the indications are within
-300V . . . . . . . . . . . . . . . . 9.5 K to 10.5 K
p r e s c r i b e d limits.
+275V . . . . . . . . . . . . . . . . 28 K to 34 K
( 9 ) Set sweep oscillator (1-5) SWEEP
S E L E C T O R control to AUTO. Oscilloscope
Table 2-2, footnote. The footnote is
(1-4) will indicate -4 V pulse as in figure 2-1.
d e l e t e d entirely.
2
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