Added Benefits of Preselected Millimeter Measurements
Reduced overload from many signals
Preselected millimeter mixers reduce
susceptibility to overloading by
numerous signals. Overloading can
cause your measurements to be
uncalibrated.
System amplitude accuracy
Millimeter preselection improves
system amplitude accuracy by
reducing the level of local oscillator
(LO) emissions back to the device
under test. Option 001 further
improves system amplitude accuracy
by adding an isolator in front of the
input filter. With Option 001, the RF
input VSWR is <1.6:1 in A, Q, and U
bands and <2.3:1 in V Band.
System configuration
To operate your 11974 Series
preselected millimeter mixer, simply
connect the tune+span output, local
oscillator output,
1
and the IF input of
the spectrum analyzer to the mixer.
Select the appropriate analyzer using
the switch on the rear panel of the
mixer. Make two easy adjustments,
and you’re ready to make millimeter
measurements.
The 11974 Series connect to a
standalone power supply with a
convenient 6-foot cable. Use the
same power supply with any 11974
Series preselected mixer.
A full set of upgrade kits is available
to ensure compatibility with your
existing spectrum analyzers including
Agilent 8560A, 8561A/B, 8562A/B,
8566A/B, and E4440A/46A/48A PSA
Series. Refer to the compatibility table
to determine whether your spectrum
analyzer requires an upgrade.
All versions of 8563A spectrum
analyzers and 70907B external mixer
interface modules are fully compatible
with the 11974 Series.
Greater dynamic range
Preselection improves dynamic range
when signals are sufficiently spaced.
The preselector allows only one of
these signals to reach the mixer at a
time. So internally produced distortion
products, such as third order
intermodulation, are reduced.
Ease of use
Operators no longer need to learn
techniques of signal identification.
Anyone familiar with preselected
microwave spectrum analyzers can
quickly and easily make millimeter
measurements. Spurs from a device
under test are easily found. They
are not hidden by images or multiple
responses.
11974A
11474Q
11974U
11974V
26.5 GHz
33 GHz
40 GHz
50 GHz
60 GHz
75 GHz
1. Operation with 8566B spectrum analyzers requires the use of an 11975A LO amplifier to provide sufficient local oscillator power to the 11974 Series LO input.
2
Specifications
Unless noted, all specifications
describe warranted performance
under the following conditions:
5-minute warm-up from ambient
conditions; 1-year calibration cycle;
environmental requirements met;
IF and LO connections between
the Agilent 11974 and a compatible
spectrum analyzer are made with one
length of coax cable (part number
5061-5458). Typical performance
is non-warranted. Supplemental
characteristics are denoted by
“nominal”; these constitute non-
warranted functional performance
information derived during the design
process and are not tested on a
continuing basis.
Amplitude
Displayed average noise level
Spectrum analyzers: 8566B, 71OOOC,
PSA Series (RBW = 10 Hz)
Maximum Typical
11974A
11974Q
11974U
11974V
–111 dBm
–106 dBm
–109 dBm
–100 dBm
–118 dBm
–116 dBm
–117 dBm
–109 dBm
Amplitude
Image rejection (image positioned
2x fIF above tuned response)
Spectrum analyzers: 8566B, 71000C,
PSA Series
O °C to
55 °C
11974A
11974Q
11974U
≤ –54 dBc
≤ –50 dBc
≤ –50 dBc
20 °C to
30 °C
≤ –59 dBc
≤ –55 dBc
≤ –55 dBc
≤ –55 dBc
≤ –45 dBc
Displayed average noise level
Spectrum analyzers: 8563A/62A/61B/
60A (RBW = 300 Hz)
1
Maximum Typical
11974A
11974Q
11974U
11974V
–96 dBm
–91 dBm
–94 dBm
–85 dBm
–103 dBm
–101 dBm
–104 dBm
–94 dBm
11974V
≤ –50 dBc
(50 to 67 GHz)
11974V
≤ –40 dBc
(67 to 75 GHz)
Image rejection (image positioned
2x fIF above tuned response)
Spectrum analyzers: 8563A/62A/61B/
60A
O °C to
55 °C
11974A
11974Q
11974U
≤ –50 dBc
≤ –45 dBc
≤ –45 dBc
Frequency
Frequency range
(LO harmonic number)
11974A (n = 8)
11974Q (n = 10)
11974U (n = 10)
11974V (n = 14)
26.5 GHz to 40 GHz
33 GHz to 50 GHz
40 GHz to 60 GHz
50 GHz to 75 GHz
Maximum conversion loss
RF to IF port (includes 1-m IF cable,
part number 5061-5458)
11974A
11974Q
11974U
11974V
44 dB
46 dB
43 dB
57 dB
20 °C to
30 °C
≤ –55 dBc
≤ –50 dBc
≤ –50 dBc
≤ –50 dBc
≤ –40 dBc
11974V
≤ –45 dBc
(50 to 67 GHz)
11974V
≤ –35 dBc
(67 to 75 GHz)
Preselector bandwidth
(3 dB points)
Minimum
11974A
11974Q
11974U
11974V
80 MHz
100 MHz
100 MHz
100 MHz
Typical
130 MHz
150 MHz
150 MHz
200 MHz
Conversion loss chart accuracy
20 °C to 30 °C: RSS of calibration
equipment errors (Add 0.7 dB if used
with 8563A/62A/61B/60A.)
0 °C to 55 °C: RSS of calibration
equipment errors plus worst-case
temperature effects of 11974 (Add
0.7 dB if used with 8563A/62A/61B/
60A.)
0 °C to
55 °C
11974A
11974Q
11974U
11974V
≤ ±2.3 dB
≤ ±2.3 dB
≤ ±2.6 dB
≤ ±4.5 dB
Multiple response
(Due to in-range applied signals mixing
with LO harmonics other than order n)
11974A (n = 8)
11974Q (n = 10)
11974U (n = 10)
11974V (n = 14)
(applied signal:
50 to 67 GHz)
(applied signal:
67 to 75 GHz)
≤ –60 dBc
≤ –55 dBc
≤ –63 dBc
≤ –60 dBc
≤ –60 dBc
Center frequency accuracy,
residual FM, span accuracy
Using specifications of the spectrum
analyzer, evaluate characteristics with
reference to the harmonic numbers
listed below.
Harmonic number
11974A
11974Q
11974U
11974V
n=8
n = 10
n = 10
n = 14
20 °C to
30 °C
≤ ±1.0 dB
≤ +1.0 dB
≤ +1.1 dB
≤ ±2.0 dB
1 dB gain compression
(nominal)
11974A
11974Q
11974U
11974V
≥ +6 dBm
≥ 0 dBm
≥ 0 dBm
≥ +3 dBm
1. The minimum usable resolution bandwidth of the 8563A/61B/60A in external mixing mode is 300 Hz. The 8562A can be used with its minimum resolution band width of
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