The
6060A.AN Synthesized Signal
Generator (referred to
as the
Generator or instrument) is a fully-programmable,
precision, synthesized signal
Generator. In addition, an
FM deviation meter is included. The
Generator is designed
for applications that require good modulation, frequency
accuracy, and output level performance with moderate
spectral purity. It is well suited for testing a wide
variety of RF components and systems including filters,
amplifiers, mixers, and radios, particularly on-channel
radio testing.
.
Generator DESCRIPTION
Fundamental features of the
Generator are as follows:
0.01-MHz to 520-MHz output frequency range in 10-Hz steps
+ 13-dBm to -127-dBm level range in 0. l-dB steps
AM and FM, internal or external
Internal 400-Hz and 1000-Hz modulation
Oscillator
FM Deviation Meter
Relative frequency and amplitude
Volts/dBm conversion
Store/recall memory
Master/slave for frequency, amplitude, and modulation step
(IEEE-488
Interface controlled)
Fluorescent display, 5 '/t-inches high, rack mountable (with
optional kit)
1-5. Controller Functions
The Controller microprocessor controls all operator
Interface functions, performs background operations such as
status checks, and updates (strobes) the front panel
displays. Whether you are using local control with the front
panel, or remote control with the IEEE-488
Interface, the
microprocessor provides self test and diagnostic capability.
Economical instrument performance is achieved by using
Software compensation
1-6. LOCAL CONTROL
The value of the
Basic parameters of the
Generator, i.e..
amplitude, frequency, or modulation can be controlled in
three ways:
Direct numeric entry
Incrementing or decrementing the bright digit
Step-up or step-down entry where the step size can be
operator programmed
Other controls provide selection of the POWER ON/OFF, RF
OUTPUT ON/OFF, MODULATION ON/OFF, internal/external
frequency reference, and STATUS.
1-7. DISPLAY FIELD
The programmed values of modulation, frequency, and
amplitude are displayed in the three display fields. When in
the deviation meter mode, the measured deviation, frequency,
and detector status are displayed in the three display fields.
1-8. REMOTE-CONTROL PROGRAMMING
The IEEE-488
Interface allows the
Generator to be remotely
controlled with any IEEE-488 bus controller. The instrument
can also be used on the IEEE-488 bus without a controller in
a listen-only or talk-only mode by selecting the appropriate
Generator rear panel IEEE-488 switch settings.
All instrument controls can be remotely controlled except
the POWER ON/OFF and the rear panel REF INT/EXT switches.
The IEEE-488
Interface provides additional commands not
available with local control, such as data transfer and
individual control of internal I/O control bits.
The IEEE-488
Interface allows two Generators to track
amplitude, frequency, or modulation in a master/ slave
configuration when using the front panel step-up and
step-down entries on one of the instruments. For instance,
frequency tracking is convenient for tests involving mixers,
and amplitude tracking is useful for two-tone
intermodulation testing.
1-9. Frequency
The specified frequency range is 0.01 to 520 MHz. The
frequency is synthesized from a
m.MH7 rpfprpnpp onrl r» r rn /1 /H pc on Aiitnnt ro c lliti
nn rtf 1 A l-I 7 r\ 70 f ilia onti ro f ran uan/i r
*V >'* lit 1 Wiv,« v.ivt Uiiu pi w v 1UVJ un i** I i
VOU1U11U1I KJ1 1 J Hi, U VV1 LllW LUlll W II W Vj UCI
range. The relative frequency mode allows the frequency to
be programmed in relation to a center frequency or an offset
frequency. This is convenient for testing filters and
mixers. The output frequency stability and accuracy depends
on the reference, whether that reference is internal or
external.
1-10. Reference
The internal frequency reference is a 10-MHz ambient crystal
oscillator. With the rear panel REF INT/EXT switch set to
INT, the
Generator output frequency is synthesized from the
internal 10-MHz crystal
Oscillator reference, and the
internal
Oscillator (timebase) TTL signal is available at
the 10 MHz IN/OUT connector.
^CTO^^QQQaiSKrated from an external 10-MHz timebase by
setting the rear panel REF INT/EXT switch to EXT and
applying a TTL timebase signal to the 10 MHz IN/OUT connector.
1-11. Amplitude
The
Generator has a specified signal level range from + 13
to -127 dBm with programming limits of+ 19 and -147.4 dBm.
This corresponds to specified terminated voltages of IV to
0.1 yuV and limits of 2V to 0.01 ¿iV, respectively. The
maximum usable signal level is approximately + 15 dBm. The
level entry can be in dBm or volts, or it can be converted
from one to the other. In addition, the relative amplitude
mode allows you to account for cascaded gain or loss, or to
display the level (in dB) relative to 1 ¿tV or 1 mV.
1-12. Modulation
Both internal and external amplitude modulation and
frequency modulation capability is available. The internal
modulation
Oscillator is selectable between 400 Hz and 1000
Hz. AM depths of 0% to 99% are available in 1% steps. FM
deviation ranges of 10 kHz, 100 kHz, and 500 kHz are
available in steps of 10 Hz, 100 Hz, and 1 kHz, respectively.
1-13. Deviation Meter
The deviation meter measures FM deviation in two ranges of
500 kHz and 50 kHz. Deviation measurements can be made over
a frequency range of 30 to 500 MHz and a level range of 15
mV to 5V rms. The frequency, displayed in the frequency
field, can be varied while making deviation meter
measurements. The measured deviation is displayed in the
modulation field and the detector status (± peak) is
displayed in the amplitude field.
Comments