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R & S E K 8 9 5 / R & S E K 8 9 6
User Manual
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Bandwidth
3.1.9.2 Altering the Bandwidth Quasi>continuously or Selecting a Fixed Bandwidth
(R&S EK 895)
Note:
For this the Software Option R&S EK!895S7 is
required.
The bandwidth can be either selected from a
choice of fixed frequencies or be set quasi>
continuously.
Upon actuation of softkey BW the bandwidth
selection menu is called up. The menu offers
the following functions:
f BW= (move to the next lower fixed
bandwidth)
f BW> (move to the next higher fixed
bandwidth)
f VAR (switchover to quasi>continuous
bandwidths)
Once the bandwidth selection menu has been
called up, the tuning knob will only have effect
on the function BW.
The currently effective bandwidth is displayed
in the bandwidth field (in kHz) and in the
menu line (in Hz).
3.1.9.2.1 Altering the Bandwidth Quasi>
continuously
The available bandwidth range (100 Hz to
9!kHz) is subdivided into 128 bandwidths.
Neighbouring bandwidths differ by approx.
3!%.
Example: ....155 Hz Æ 161 Hz Æ 166 Hz...
Depending on the set modulation mode, the
bandwidth can be altered within certain limits
(see table on the folllowing page) by turning
the tuning knob.
For decreasing the bandwidth turn the tuning
knob counter>clockwise. For increasing the
bandwidth turn the tuning knob clockwise.
Turning the tuning knob automatically
activates the quasi>continuous bandwidth
selection and the displayed VAR is underlined.
3.1.9.2.2 Selecting a Fixed Bandwidth
Note:
Depending on the set modulation mode, only
certain bandwidths can be set resp. only these
bandwidths make sense:
FM: f 4 kHz
ISB: 2.1 to 3.1 kHz
SSB: 150 Hz to 3.6 kHz
2.7 kHz (for data link models)
Depending on the set modulation mode, the
operator can select from up to 17 bandwidths
by actuating softkey BW= or BW>.
The following bandwidths (indications) are
possible:
f 150 Hz (0.1) f 2.4 kHz (2.4)
f 300 Hz (0.3) f 2.7 kHz (2.7)
f 400 Hz (0.4) f 3.1 kHz (3.1)
f 600 Hz (0.6) f 3.6 kHz (3.6)
f 800 Hz (0.8) f 4.0 kHz (4.0)
f 1 kHz (1.0) f 4.8 kHz (4.8)
f 1.5 kHz (1.5) f 6 kHz (6.0)
f 1.8 kHz (1.8) f 8 kHz (8.0)
f 2.1 kHz (2.1)
In order to move to the next larger bandwidth
actuate softkey BW>.
In order to move to the next smaller band>
width actuate softkey BW=.
Actuate the relevant softkey several times, as
necessary, until the desired bandwidth is indi>
cated.
Once the maximum or minimum value is
reached, the display does not change any more
for further actuation of the relevant softkey.
By actuating softkey BW= or BW>, selection
from the fixed bandwidths is automatically ac>
tivated and the VAR indication will no longer
be underlined.
6164.0717.02_01
> 3.20 >
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