Atec Agilent-E8257D - Manual (Page 4)

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Operating modes • Step sweep of frequency or amplitude or both (start to stop)
• List sweep of frequency or amplitude or both (arbitrary list)
Sweep range
Frequency sweep
Within instrument frequency range
Amplitude sweep Within attenuator hold range (see “Output” section)
Dwell time 1 ms to 60 s
Number of points 2 to 65535 (step sweep)
2 to 1601 per table (list sweep)
Triggering Auto, external, single, or GPIB
Settling time
Frequency
< 8 ms (typ) 1
Amplitude < 5 ms (typ)
Operating modes • Synthesized frequency sweep
(start/stop), (center/span), (swept CW)
• Power (amplitude) sweep (start/stop)
• Manual sweep
RPG control between start and stop frequencies
• Alternate sweep
Alternates successive sweeps between current and
stored states
Sweep span range Settable from minimum 3 to full range
Maximum sweep rate Start frequency Maximum sweep rate Max span for
100 ms sweep
250 kHz to < 0.5 GHz 25 MHz/ms 2.5 GHz
0.5 to < 1 GHz 50 MHz/ms 5 GHz
1 to < 2 GHz 100 MHz/ms 10 GHz
2 to < 3.2 GHz 200 MHz/ms 20 GHz
≥ 3.2 GHz 400 MHz/ms 40 GHz
Frequency accuracy ± 0.05% of span ± timebase (at 100 ms sweep time, for
sweep spans less than maximum values given above)
Accuracy improves proportionally as sweep time increases 4
Sweep time (forward sweep, not including bandswitch and retrace
intervals)
Manual mode settable
10 ms to 200 seconds
Resolution 1 ms
Auto mode Set to minimum value determined by maximum sweep
rate and 8757D setting
Triggering Auto, external, single, or GPIB
Markers 10 independent continuously variable frequency markers
Display Z-axis intensity or RF amplitude pulse
Functions M1 to center, M1/M2 to start/stop, marker delta
Two-tone (master/slave) Two PSG’s can synchronously track each other, with
measurements 5 independent control of start/stop frequencies
Network analyzer Fully compatible with Agilent 8757D scalar
compatibility network analyzer 6
Also useable with Agilent 8757A/C/E scalar network
analyzers for making basic swept measurements. 7
Step (digital) sweep
Ramp (analog) sweep
(Option 007) 2
1. 19 ms (typ) when stepping from greater than 3.2 GHz to less than 3.2 GHz.
2. During ramp sweep operation, AM, FM, phase modulation, and pulse modulation are useable but performance is not guaranteed.
3. Minimum settable sweep span is proportional to carrier frequency and sweep time. Actual sweep span may be slightly
different than desired setting for spans less than [0.00004% of carrier frequency or 140 Hz] x [sweep time in seconds]. Actual
span will always be displayed correctly.
4. Typical accuracy for sweep times > 100 ms can be calculated from the equation: [(0.005% of span)/(sweep time in seconds)]
± timebase. Accuracy is not specified for sweep times < 100 ms.
5. For master/slave operation use Agilent part #8120-8806 master/slave interface cable.
6. When measuring low-pass devices in AC mode, dynamic range may be reduced up to 10 dB below 3.2 GHz. An external
highpass filter may be required to remove 27 kHz pulse source feed-through (For instruments operating from 10 MHz to 20 GHz
with 3.5 mm connectors, use Bias Tee part number 5086-7322. For instruments operating from 10 MHz to 50 GHz with 2.4 mm
connectors, use Bias Tee part number 5086-7484.)
7. GPIB system interface is not supported with 8757A/C/E, only with 8757D. As a result, some features of 8757A/C/E, such
as frequency display, pass-through mode, and alternate sweep, do not function with PSG signal generators.