SECTION 3: OSCOR MANUAL OPERATION
REI OSC-5000E 32
UP and DOWN
Similar in function to the rotary dial, the UP and DOWN buttons will immediately jump
to the next higher or lower frequency span (Frequency Display Window). These buttons
are also used for tuning the sub-carrier system (see page 40 Tuning Sub-Carrier).
Pressing SHIFT followed by UP or DOWN will jump one half screen. The UP and DOWN
buttons are also used to scroll through the input lists and signal database lists (see page
43 Data Functions (STORE/RECALL)).
SEEK/LIMITS
The SEEK/LIMITS button uses the automatic tuning function to automatically adjust the
signal being received and analyzed.
Press SHIFT then SEEK/LIMITS to scan to the next higher frequency signal while
operating in the Analyze mode.
Direct Frequency Entry
Rather than using the rotary dial with the EXPAND/NARROW and UP/DOWN buttons, a
frequency can be entered directly from the keypad. The OSCOR will immediately jump to
the required input antenna and appropriate frequency window to view the desired
frequency.
To enter a frequency megahertz using the keypad:
1. Type the desired frequency,
2. Press ENTER.
To enter a frequency kilohertz using the keypad:
1. Type in the desired frequency,
2. Press the k/MHz button to change the units mode to kilohertz,
3. Press ENTER.
Receiver Attenuator
Since the OSCOR is a highly sensitive receiver, it is possible for very strong signals to
have an overloading effect on the antenna pre-amplifiers. Receiver overload is evidenced
by strong signals (such as FM broadcast radio stations) appearing at harmonic
frequencies. For example, if you are near a very strong FM radio station transmitter, a
signal at 98.5MHz may also appear in the spectrum at 197MHz. The transmitter is not
actually radiating these harmonic signals; they are being generated in the receiver as a
result of an overloaded RF circuit. The built-in attenuator should be turned on to reduce
or eliminate the RF overload. The RF attenuator will reduce sensitivity by 20 dB. The
attenuation is being applied prior to amplification in the antenna panel pre-amplifiers.
To turn on the RF attenuator:
In the Sweep or Analyze Mode, press the F4 button (labeled ATTN OFF on the
Display). The F4 button toggles the attenuator mode to on or off.
NOTE: The OSCOR attenuator does not affect the operation of the MDC-2100.
To Next Page
Loading...