Fluke DDS Function Generator 271, User Manual

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Introduction and Specifications
Specifications
1
1-7
Start/Stop Phase
The phase relationship between the
MAIN OUT
and
AUX OUT
sockets is determined by
the start/stop phase setting.
Carrier frequency: 0.1 mHz to >1 MHz.
Carrier waveforms: All.
Range: -360 to +360 degrees.
Resolution: 1 degree.
Accuracy: Typically 1 degree to 30 kHz.
Trigger Generator
Internal source 0.005 Hz to 50 kHz square wave, adjustable in 20 µs steps with 3 digit
resolution. Available for external use from a rear panel socket.
Outputs
Main Output
Output Impedance: 50 Ω or 600 Ω
Amplitude: 5 mV to 20 V p-p into an open circuit,
2.5 mV to 10V p-p into 50
Ω /600 Ω .
Output can be specified as VhiZ (open circuit value) or V
(voltage into characteristic impedance) in p-p, r.m.s. or dBm.
Amplitude accuracy: ±3 % ±1 mV at 1 kHz into 50 Ω /600 Ω .
Amplitude flatness: ±0.2 dB to 500 kHz; ±1 dB to 10 MHz.
DC offset range: ±10 V. The dc offset plus signal peak is limited to ±10 V
from 50
Ω /600 Ω .
DC offset accuracy: typically ±3 % ±10 mV, unattenuated.
Resolution: 3 digits for both amplitude and dc offset.
Pulse aberrations: <5 % + 2 mV.
Aux Out
CMOS/TTL levels with symmetry and frequency of main output. The phase relationship
between
MAIN OUT
and
AUX OUT
is determined by the start/stop phase setting.
Trig/Sweep Out
The function of this output is automatically determined by the generator operating mode.
Except in sweep and hop modes the output is that of the internal trigger generator, a fixed
amplitude square wave, the frequency of which is set in the
trig
or
gate
menu.
The rising edge of the trigger generator initiates trigger, gate and burst modes.
In sweep mode the output is a 3-level waveform, changing from high (4 V) to low (0 V)
at the start of the sweep, with narrow 1 V pulses at marker points.
In hop mode the output goes low on entry to each waveform step and high after the new
frequency and wave shape of that step have been set.
Output impedance is 1 k
Ω .
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