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FLEX-6000 Signature Series - SmartSDR for Windows Software User’s Guide

Page 100

be pointed toward the band opening for this measurement because noise propagates with the

opening.

Note: Although the RF gain slider is present in every Panadapter, the setting controls the RF

preamplifier of the associated SCU. If you adjust the preamp settings for one Panadapter, all other

Panadapters associated with that SCU will also be changed since the change is made to the SCU.

On a FLEX-6600/M and FLEX-6700, this is equivalent to making the change on a “per antenna”

basis. In the case of the FLEX-6500, FLEX-6400/M and FLEX-6300 with a single SCU, the preamplifier

settings affect all Panadapters and receivers.

The preamp indicator in the upper right corner of the Panadapter will be lit whenever the

preamp/attenuator is turned on for the band. It will show the requested gain on all radio models

other than the FLEX-6300. On the 6300, the preamp provides different levels of gain by frequency. If

there is a net +5dB or better gain, the indicator will show PRE. If there is a net -5dB or less gain

(attenuation) then the indicator will read ATTN. If it is in-between these two values, it will read ----

to indicate that the preamp is on, but not providing much change in the band of interest. This means

that on a 6300 one Panadapter could indicate PRE and the other ATTN.

25.13 ANTENNA CONFIGURATION BASIC TERMS AND RULES

For more advanced antenna configurations, it is helpful to define terms used to describe the FLEX-

6000 Signature Series architecture and the rules associated with its configuration.

• A Spectral Capture Unit (SCU) is a direct sampling, wideband digitizer that captures the entire

RF spectrum within its input filter limits.

• The FLEX-6700/6700R and FLEX-6600/M models contain two fully equivalent but

independent SCUs. The FLEX-6500, FLEX-6400/M and FLEX-6300 contain a single SCU.

• The FLEX-6700/6700R and FLEX-6600/M models can simultaneously digitize two antennas,

one for each SCU, while the FLEX-6500, FLEX-6400/M and FLEX-6300 digitize a single

antenna.

• Each Panadapter spectral display requires selection of an associated receive antenna. The

default association for the first Panadapter is ANT1.

• One or more Slice Receivers may be placed on one or more Panadapters.

• Multiple Slices and Panadapters can share a single receive antenna.

• SmartSDR allows up to eight Panadapters and eight Slice Receivers on the FLEX-6700/6700R

models and up to four Panadapters and four Slice Receivers on the FLEX-6600/M and FLEX-

6500. The FLEX-6400/M and FLEX-6300 allow up to two Panadapters and two Slice Receivers.

FlexRadio Systems FLEX-6000 Signature Series User Manual

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