REI manual Example of a Desired Frequency, Recommended Implementation, Span, MDC-2100/MDC-900

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Example of a Desired Frequency

Version 4

27 Feb 08

includes the desired frequency span. The table below provides some examples and recommended search span for speed and accuracy.

Example of a Desired Frequency

Recommended Implementation:

 

Span:

 

4

– 6GHz

3 – 9GHz (MDCA-1 & MDCB-1/OSCOR 5.0)

6

– 8GHz

3 – 9GHz (MDCA-1 & MDCB-1/OSCOR 5.0)

5.7

– 5.9GHz

5.8 GHz, 250MHz span

8 – 10GHz

3 – 21GHz (MDCA-all & MDCB-all/OSCOR 5.0)

13

– 16GHz

3 – 21GHz (MDCA-all & MDCB-all/OSCOR 5.0)

Figure 10; EXAMPLES OF STORING SPANS

Storing a Signal in the MDC Frequency Range

When a signal is stored in the OSCOR signal database, only the signal frequency is stored in OSCOR memory. However, when the OSCOR tunes to a specific signal in the MDC frequency band (3 - 21GHz) then the OSCOR automatically directs the MDC to the proper antenna band and filter group to maximize the signal to noise ratio and maximize the system performance. An example signal is shown below, Figure 11.

Figure 11: ANALYZE MODE USING THE MDC (OSCOR 4.0)

To store a specific frequency:

1.Ensure that the OSCOR is in the ANALYZE mode.

2.Type in the desired center frequency between 3 and 21 GHz (or 3 and 9GHz for the MDC-900).

3.Press the STORE button.

4.To review the stored frequencies, simply press the RECALL button from ANALYZE mode. Alternatively, you may select AUTO/MANUAL, then MANAGE DATA, then SIGNALS, then EDIT MENU and pick from that list.

Note: Frequencies are stored in a 2.5MHz wide window (span). If a different span is desired the frequency should be stored as a span. See previous instructions. Further details can be found in the OSCOR Owner’s Guide.

REI

MDC-2100/MDC-900

11

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Contents RESEARCH ELECTRONICS INTERNATIONAL 455 Security Drive MDC-2100/MDC-900MDC-900 MDC-2100 OWNER’S GUIDEFIGURE 11 ANALYZE MODE USING THE MDC OSCOR TABLE of CONTENTSTABLE of FIGURES STORING A SIGNAL IN THE MDC FREQUENCY RANGEFigure 1 MDC-2100 MICROWAVE DOWNCONVERTER INTRODUCTIONFilter A & B ANTENNA BANDFilter A Filter BInstalling the MDC-2100/MDC-900 OSCOR Version Signal identification ProcessOperational Control of the MDC-2100/MDC-900 Press F4/Identify see Figure 6B Viewing Bands 1, 2 andPress F4/MDC Anlz Press SWEEP/ANALYZEFIGURE 7 USING “IDENTIFY” TO VERIFY A SIGNAL OSCOR OSCOR Sweep and Analyze Modes with the MDCFigure 6A ANALYZING AN MDC SIGNAL OSCOR Figure 6B ANALYZING AN MDC SIGNAL OSCORFigure 8 SELECTING A SIGNAL WITH THE MDC OSCOR Storing a Sweep Span with the MDC Span Storing a Signal in the MDC Frequency RangeExample of a Desired Frequency Recommended ImplementationMicrowave Transmission Considerations for the MDC it is absolutely necessary in order to save time. A good rule of thumb is to assume that the MDC has an antenna pattern that is about 100 degrees wide. In other words, it is necessary to point the MDC in at least 4 different directions around the room to cover the perimeter. Also, the MDC should be pointed up and possibly moved around the room to cover the ceiling, and down to cover the floor. Furthermore, if you expect a very sophisticated threat, it is recommended to point the MDC into ducting, above ceiling tiles, and in any enclosed spaces in which it would be possible to place a transmitter with a high gain antenna. It is highly recommended that the “Show All” mode of operation for the MDC-2100 be utilized MDCA-all and MDCB-all if using OSCOR 5.0. When a signal is detected, the user can then manually select the different antenna bands and filters to further investigate the signal. Or, the user can simply go to the analyze mode and allow the MDC to determine the operational frequency of the transmitter. Also, it is not recommended to use the MDC with the OSCOR automatic mode unless the MDC directional characteristics are taken into consideration. If running the OSCOR and MDC in the automatic mode, take care to enable the appropriate MDC spans. To maximize usage of the MDC, include MDC 3-21GHz Filter A and MDC 3-21GHz Filter B in your span list For OSCOR 4.0 users, set span to All Bands A&B Using the MTU-2100 Microwave Test Unit MDC-900 MDC-2100/MDC-900 SPECIFICATIONSSpecifications MDC-2100Technical Bulletin