Here are the main
differences between the HP 8920B and the Agilent E8285A units. The
E8285A does not have the following features found on the
1) The E8285A
does not auto count the RF frequency on the
RF Analyzer Screen and the 8920B does.
2) The E8285A
does have an encoder
and decoder screen like the 8920B units but these screens do not
include the DPL,
LTR, EDACS or POSCAG
functions found on the 8920B. The
8935 does encode / decode CTCSS and
3) The E8285A does
not have a squelch control. The squelch can be operated in a "fixed"
level or open.
Only E8285A units with option 102 have the spectrum analyzer / tracking
Power input is limited to 2.5 watts. More power will require an
The E8285A has some extra's over the 8920B. The E8285A has spec'd.
from 300KHz-1000MHz and 1.7GHz-2.0GHz.and works down to 0.1 MHz.
The E8285A has an
"electro-luminicent" display that is much more visable in sunlight and
has a longer life than the 8920 type CRT display. Most modules
including the input module can easily be swapped from unit to unit
because the cal data is included in the module and will auto read.
Here are the HP / Agilent E8285A Screens.
They are the TX Test, RX Test, Duplex Test, RF Generate, RF
Analyzer, AF Analyzer, Spectrum
Analyzer, Spectrum Analyzer with Tracking Generator in use,
Oscilloscope, Encoder and Decoder.
E8285A TX Test
E8285A RF Generator
Some of these pictures aren't the
sharpest but it's easy to note that they are very similar to the 8920B
Using the E8285A Test Set
The E8285A Test Set has several screens for analog use. To access these
screens, rotate the curser knob on the front panel until the curser is
on the top most field known as the title bar. Select this field by
pressing in the curser knob. With the field highlighted, rotate the
curser knob and the different fields will scroll. To select one, stop
on it and select it. The scroll knob can now be used to move the curser
to different fields on te screen. Fields are changed by selecting the
field and rotating the curser knob of using the keyboard to enter
numbers / letters. To make the test set boot to the analog RF Generator
field, your test set has this field saved as "POWEON". (in the save /
recall menu) The analog section of the E8285A test set was removed from
the units user manual but is is extremely similar to the E6380A unit.
For more information on using the E8285A, it's suggested you download
the E6380A Reference Manual and see the analog
Differences between HP
8920A/B, 8924C, E8285A and HP E6380A
Set up your E8285A
for Analog Radio Use
AA battery low warning
Capture the E8285A
screen to your PC
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