Design innovations in the 6070A and 6071A combine the
precision resolution and settability of a synthesizer with
the low-noise performance of the best open-loop signal
generators on the market. And these two state-of-the-art
instruments were developed to be competitively priced as
well as cost effective in other ways.
The 6070A and 6071A are programmable and directly compatible
with IEEE Std 488-1978. With them, you may make
sophisticated tests and measurements rapidly and with great
precision. On VHF and UHF receivers you can measure
selectivity, sensitivity, intermodulation distortion, AM
rejection, AGC response, audio hum, noise and distortion,
and SINAD ratio. Or you can align a discriminator or check
IF response using the digital sweep feature.
Spectral purity is excellent. Spurious outputs, those not
related harmonically to either the carrier frequency or the
power line frequency, are on the order of -90 dBc to -100
dBc to 520 MHz and -84 dBc above 520 MHz. The typical
broadband noise floor is a comfortable -150 dBc per Hz, and
the single sideband phase- noise is typically -138 dBc per
Hz at 20 kHz offset from a 500 MHz carrier. These
specifications, by any standard, reflect a truly excellent
level of spectral purity.
AM, FM, 0M Modulation
Amplitude modulation depth can be set from 0% to 99.9% in
0.1% steps. External dccoupling is provided for leveling,
extending bandwidths down to dc, or providing analog control
of output amplitude.
Frequency or phase modulation can be set with deviations up
to 1 MHz or 100 radians respectively, depending on the rf
frequency. Exceptionally wide deviation is made possible by
a high deviation mode that is automatically activated when
required. External, dc-coupled FM is available for phase
locking the instrument to another source. That extends the
maximum deviation at low rates, and provides for analog
sweeping with an external signal.
Simultaneous AM+FM or ΑΜ+φΜ is available internally or from
internal-external combinations. The internal modulation
oscillator covers a wide range of frequencies. It can be
continually varied from 20 Hz to 200 kHz, with an overrange
capability extending it from 1 Hz to 255 kHz in steps of
The modulation oscillator output is available at a front
panel connector. This provides you with an audio source
separate from the rf output. Typical total harmonic
distortion is 0.05%.