Specifications

17
Bandwidth selectivity
60 dB/3 dB bandwidth ratio:
< 15:1 3 MHz to 100 kHz
< 13:1 30 kHz to 10 kHz
< 11:1 3 kHz to 30 Hz
60 dB points on 10 Hz bandwidth are separated by < 100 Hz.
Bandwidth shape
Synchronously tuned (approximately Gaussian).
Figure 1. Typical spectrum analyzer resolution
Marker
Normal
Displays the frequency at the horizontal position of the
tunable marker.
Accuracy: Center frequency accuracy + frequency span
accuracy between the marker and center frequency.
Peak search positions the marker at the center of the
largest signal response present on the display to within
± 10% of resolution bandwidth.
∆
Displays the frequency difference between the stationary
and tunable markers. Reference frequency need not be
displayed.
Accuracy: Same as frequency span accuracy; in the
frequency count mode, twice the frequency count
uncertainty plus drift during the period of the sweep
(see STABILITY DRIFT).
Freq Count
Displays the frequency of the signal on whose response the
marker is positioned.
1 Line voltage disconnected without power to the frequency reference. When the
analyzer is in “stand by”, the frequency reference temperature is maintained at
a steady state. Frequency accuracy is then subject to the standard instrument
warm-up period indicated in the General Specifications section.
2 30 kHz and 100 kHz bandwidth accuracy figures only applicable ≤ 90% relative
humidity.
Frequency
Measurement range
100 Hz to 1500 MHz through two RF inputs: 100 Hz to
1500 MHz dc coupled and 100 kHz to 1500 MHz ac coupled.
Display values
Center frequency
0 Hz to 1500 MHz.
Variable from data knob or numeric/unit keyboard
in approximately 1% increments.
Frequency reference accuracy:
Aging rate: < 1 x l0E–9/day and < 2.5 x l0E–7/year
Warm-up time (after less than 24 hours with line
power disconnected):
1
< 72 hours to meet aging rate specification
Warm-up time (after line power is disconnected
indefinitely):
1
30 days to meet aging rate specification
Temperature stability: < 7 x 10E–9 over the 0 ° to 55 °C range.
Readout accuracy
Span ≥ 100 Hz: ±(2% of frequency span + frequency
reference accuracy x tune frequency +10 Hz) after
adjusting freq zero at stabilized temperature.
Zero frequency span
Resolution Accuracy: Freq ref Readout
bandwidth accuracy x tune freq + resolution
10 to 300 Hz 10 Hz 1 Hz
1K to 3kHz 100 Hz 10 Hz
10K to 3 MHz 1 kHz 100 Hz
Frequency span
100 Hz to 1500 MHz over 10-division CRT horizontal axis.
Variable from data knob, or numeric/unit keyboard in
approximately 1% increments; step keys change span
in a 1,2, 5 sequence.
In zero span, the instrument is fixed tuned at the center
frequency.
Full span (0 to 1500 MHz) is immediately executed with
0 to 1.5 GHz or INSTR PRESET keys.
Frequency span accuracy: For spans > 1 MHz, +(2% of the
indicated frequency separation between two points
+0.5% span); for spans ≤ 1 MHz, ±(5% of frequency
separation + 0.5% span).
Start-stop frequency
Readout accuracy: center frequency accuracy
+ 1/2 frequency span accuracy.
Resolution
Resolution bandwidth
3 dB bandwidths of 10 Hz to 3 MHz in a 1, 3,10 sequence.
Bandwidth may be selected manually or coupled to
frequency span.
Bandwidth accuracy: Calibrated to:
2
±10%, 1 MHz to 3 kHz bandwidths.
±20%, 1 kHz to 10 Hz. 3 MHz bandwidths.
Specifications
See definition of specifications and supplemental characteristics on page 16.