General Information; General Description; Differences Between Instruments; Unpacking And Inspection - HP 606A Operating And Service Manual

Figure 1-1. Model 606A High Frequency Signal Generator
Model 606A
SECTION I
GENERAL INFORMATION
1-1. GENERAL DESCRIPTION.
1-2. The Hewlett-Packard Model 606A is a general-
purpose signal generator with a frequency range of
50 kc to 65 mc. The instrument has a direct reading
frequency dial calibrated to an accuracy of 1%. Out-
put is held constant within ± 1 db and is continuously
adjustable from . 01 microvolt to 3 volts into a 50 ohm
resistive load. An internal crystal calibrator pro-
vides check points at 100 kc and 1 mc intervals with
an error of less than 0.01%. A front- panel meter
accurately indicates the percent amplitude modulation
for frequencies within the modulation bandwidth of
the signal generator.
1-3. The Model 606A has a highly refined amplitude
modulation system which allows modulation up to 90%
with low distortion and incidental fm. This feature
makes possible precision distortion checks of re-
ceivers from antenna to output. The instrument can
be internally modulated at 400 or 1000 cps. It can
be externally modulated from dc to 20 kc or more,
depending on rf frequency in use. Complex wave-
forms, square waves, and dc voltages may be used
to modulate the Model 606A for testing and evaluating
filters, networks, amplifiers, and receivers.
Section I
Paragraphs 1-1 to 1-8
1-4. DIFFERENCES BETWEEN INSTRUMENTS.
1-5. The Model 606A carries a five- digit serial
number with a three- digit prefix ( 000-00000). The
prefix changes only when a change is made in the
instrument. The prefix, then, is an identifier, and
it appears on the title page of this manual to indicate
to which instrument this manual directly applies. A
supplement may be included with this manual to indi-
cate the necessary changes to be made in the manual
to make it apply directly to instruments which carry
a different serial number prefix.
1-6. UNPACKING AND INSPECTION.
1-7. Unpack and inspect the Model 606A as soon as
possible after receipt. Save all packing materials
until inspection is complete. These materials may
be required for reshipment should you discover any
damage.
1-8. Inspect the instrument first for signs of physical
damage such as scratched or abraded panel, broken
knobs, etc. If possible, energize the instrument and
check it electrically. Operation check is described
in paragraph 4-56. If there is any indication of
damage, file a claim with the carrier. Refer to the
warranty page in this manual.
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