Specifications
Amplitude
Inputs and outputs
(all values are nominal)
LO input
Connector type SMA (f)
Frequency range
Options
Option 001: Input isolator attached
and included in calibration. An input
isolator provides a specified broadband
RF input match. This is important
when the device under test requires
protection from out-of-band reflections
off the 11974’s input tracking filter.
With Option 001, the 11974 conversion
loss is calibrated with the input isolator
in place so that system amplitude
accuracy is maintained.
Third-order intercept (nominal)
(For two signals spaced less than
200 MHz apart)
11974A
11974Q
11974U
11974V
≥ +13 dBm
≥ +13 dBm
≥ +13 dBm
≥ +13 dBm
11974A
11974Q
11974U
11974V
Maximum LO
input level
3.3 GHz to 5 GHz
3.3 GHz to 5 GHz
4 GHz to 6 GHz
3.5 GHz to 5.3 GHz
+14.5 dBm to 16 dBm
IF subharmonic response (nominal)
Intercept (2nd order; response at
fIF/2 above input signal)
Specifications changes for Option 001
Amplitude
Displayed average noise level and
maximum conversion loss: Add +2 dB
to the standard specifications for A, Q,
and U bands; add +3 dB for V band.
VSWR
< 2.0:1 (50 Ω)
fIF/2 = 160.7 MHz
(8566B/71000C)
IF output
Connector type
Match
fIF/2 = 155.35 MHz
SMA (f)
< 1.6:1 (50 Ω)
(8563A/62A/61B/60A)
11974A
11974Q
11974U
11974V
≥ +45 dBm
≥ +45 dBm
≥ +45 dBm
≥ +30 dBm
Tune + span input
Connector type
BNC (f)
RF input VSWR
(across full waveguide band)
11974A, Q, U
11974V
< 1.6:1
< 2.3:1
Dynamic range
Refer to Figure 3
Inputs and outputs
(all values are nominal)
–20
–30
–40
RF input
Displayed
Waveguide size, flange type
average
noise floor
Size
Flange
Second order
IF subharmonic
distortion
11974A
11974Q
11974U
11974V
WR-28
WR-22
WR-19
WR-15
+25 dBm
UG 599/U
UG 383/U
UG 383/U-M
UG 385/U
–50
–60
Image and
multiple
response
–70
Maximum
RF input
level (CW,
peak, or
Third order
–80
intermod
(≤ 200 MHz
signal separation)
–90
average)
–100
VSWR (at
peak of
< 3.0:1
–110
–120
–130
preselector
filter)
–70 –60 –50 –40 –30 –20 –10
RF input (dBm)
0
+10 +20
Figure 3. Agilent 11974A system dynamic range
4
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
