Atec Noise-Com-PNG7109 - Manual

png7000 series
PRECISION
NOISE
GENERATORS
(AWGN)
General Specifications:
Output White Gaussian noise
Crest factor 18 dB minimum
Output noise power +3 dBm
Noise attenuator 0 to 63 dB in
range 0.25 dB steps
Noise attenuator ±0.2 dB or 0.5%
accuracy at 1 - 500 MHz
±0.2 dB or 1%
at 0.5 - 1.0 GHz
±0.3 dB or 2%
at 1 - 2 GHz
Signal path gain 0 ±1 dB
Group delay variation ±0.2 ns/40 MHz
Standard connectors BNC female
Dimensions 17 in. wide x 5.25 in.
high x 12.5 in. deep
Mounting Front panel handles
and fold-down feet
for bench mounting.
Brackets included for
19 in. rack mounting
Power 115 VAC, 60 Hz (230
VAC, 50 Hz optional)
Operating -10 o C to +60 o C
temperature
Specifications subject to change without notice.
The PNG7000 Series instruments generate
additive white Gaussian noise and provide a
summing input to perform signal-to-noise or
carrier-to-noise ratio testing capability. A key
feature of this instrument is its low distortion
signal path which sums the user-supplied signal
with the internal precision white noise source.
The signal path has a nominal insertion gain of
0 dB, with very
low amplitude
and phase
ripple. The noise
source provides
an exceptionally
high crest factor
of 18 dB for
accurate bit error
rate testing, even
with large carrier-to-noise (CNR) or bit energy-
to-noise density (E
b
N
o
) ratios. With option 7
(DC instead of AC coupled) signal path, the
PNG7000 can add noise directly to a digital TTL,
ECL, or similar signal that operates in a 50-ohm
system.
The standard PNG7000 is a broadband device.
For applications in which the frequency range is
limited, the unit can be configured with up to
five band-limited noise sources, each optimized
for flatness over the specified frequency band.
The PNG7000 Series is microprocessor-controlled
and continually provides information about
operation of the instrument on a 4 x 20 charac-
ter LCD display. The instruments allow control of
the noise level, noise on/off, signal on/off, and
noise source selection in three ways: at the front
panel keypad, remotely via IEEE-488 bus, or
automatically under program control.
The PNG7000 instruments can be integrated
into a test station under software control (Lab
Windows drivers are available from National
Instruments) and with the aid of a precision
power meter, carrier-to-noise ratios can be set.
1 2
www.noisecom.com
1 MHz TO 2 GHz
Rev Date 5/15/03