REI MDC-900 Benutzerhandbuch

Version 4 

 

27 Feb 08 

 

Since the MDC down-conversion process displays multiple frequency bands at once, the 
easiest way to quickly view a specific frequency span is to type in a desired center 
frequency and then use the EXPAND and NARROW keys to adjust the span.  
 
To store a specific frequency span: 
1.  Ensure that the OSCOR is in the SWEEP mode and the MDC is connected.  
2.  Type in the desired center frequency between 3 and 21 GHz (or 3 and 9GHz for the 

5.  To review the stored spans, simply press the RECALL button from the SWEEP mode. 
 
Note:  Further details can be found in the OSCOR Owner’s Guide.  
 
There are some important aspects of storing spans that should be understood: 
•  If you store a specific frequency band in the MDC range (for example 5.6 to 5.8GHz), 

the MDC will also simultaneously search a parallel frequency band (in the example it 
will also search from 6.2 to 6.4GHz).  

•  You cannot store frequency spans that cross the 1.5GHz crossover points.  See 

Figures 2 and 3 for the 1.5GHz bands.  Therefore, to search specifically from 4 to 
6GHz as an example, you may choose to search the 3 to 9GHz antenna band with the 
Group A filter to cover the range from 4.5 to 6GHz (See Figure 3).  And then, store a 
range centered at 4.25GHz with a 500MHz span to cover from 4 to 4.5GHz.  If using 
OSCOR 4.0, the fastest and simplest method would be to simply cover the entire span 
from 3 to 9GHz with Filter A & B selected.   

•  When storing a span in memory, the actual frequency limits are not displayed in the 

frequency span list. However, pressing the RECALL button will recall the span 
showing the stored frequency span.  

•  To summarize these effects:  

REI   

MDC-2100/MDC-900

 

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